pickering 40-923A-001 PXI 19-Slot PXI Chassis User Manual

: June 15, 2024
: pickering

Table of Contents

40-923A-001 PXI 19-Slot PXI Chassis
Product Information
Product Usage Instructions
8 status Reading of temperature sensor #1 in °C Reading of temperature sensor
2 in °C Reading of temperature sensor #3 in °C Reading of temperature sensor
4 in °C Reading of temperature sensor #5 in °C Reading of temperature sensor
6 in °C Reading of temperature sensor #7 in °C Reading of temperature sensor
8 in °C DC +12V status DC +5V status DC +3.3V status DC -12V status DC +12V
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

40-923A-001 PXI 19-Slot PXI Chassis

Product Information

Product Name: 19-SLOT PXI MAINFRAME 40-923A

Manufacturer: Pickering Interfaces

Issue: 2.3

Date: February 2023

Website: pickeringtest.com

ISO 9001 Registration Number: FM38792

Warranty: Three years from the date of delivery to the original
purchaser. Programmable power supplies are excluded from the
warranty coverage. Defective products within the warranty period
will be repaired or replaced at the discretion of Pickering
Interfaces. Products serviced and repaired outside of the warranty
period are warranted for ninety days.

Extended warranty and service options are available. Please
contact Pickering Interfaces for more information.

Environmental Policy: Pickering Interfaces operates under an
environmental management system similar to ISO 14001. The company
aims to fulfill all relevant environmental laws and regulations,
reduce waste and releases to the environment, and design and
operate products in a way that protects the environment, health,
and safety.

Technical Support: For technical support, please contact
Pickering Interfaces via phone, website, or email.

Contact Information:

Headquarters (United Kingdom)
- Tel: +44 (0)1255-687900
- Email: [email protected]
USA (West)
- Tel: +1 541 471 0700
- Email: [email protected]
USA (East)
- Tel: +1 781 897 1710
- Email: [email protected]
France
- Tel: +33 9 72 58 77 00
- Email: [email protected]
Germany
- Tel: +49 89 125 953 160
- Email: [email protected]
Sweden
- Tel: +46 340-69 06 69
- Email: [email protected]
Czech Republic
- Tel: +420 558 987 613
- Email: [email protected]
China
- Tel: +86 4008 799 765
- Email: [email protected]

Product Usage Instructions

This product is a 19-slot PXI mainframe (model 40-923A)
manufactured by Pickering Interfaces. It is designed to provide a
platform for PXI modules and offers a range of features for testing
and measurement applications.

Before using the 19-slot PXI mainframe, please ensure that you
have read and understood the safety symbols and instructions
provided in the product documentation.

Safety Symbols:

PROTECTIVE EARTH (GROUND): This symbol
indicates terminals intended for connection to an external
conductor for protection against electric shock or as a protective
earth (ground) electrode.
DANGEROUS VOLTAGE: This symbol warns of
hazards arising from dangerous voltages.
WARNING / CAUTION: This symbol indicates the
need to follow appropriate safety instructions or caution regarding
potential hazards.

For detailed instructions on using the 19-slot PXI mainframe,
please refer to the relevant sections in the product manual. The
manual provides information on installation, module insertion and
removal, power requirements, and other important operational
guidelines.

If you encounter any technical issues or require further
assistance, please contact Pickering Interfaces’ technical support
team via phone, website, or email.

40-923A User Manual
PXI 19-Slot Chassis

Issue 2.3 February 2023

pickeringtest.com

pickering

© COPYRIGHT (2023) PICKERING INTERFACES. ALL RIGHTS RESERVED.
No part of this publication may be reproduced, transmitted, transcribed, translated or stored in any form, or by any means without the written permission of Pickering Interfaces.
Technical details contained within this publication are subject to change without notice.
ISO 9001 Reg No. FM38792

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TECHNICAL SUPPORT
For Technical Support please contact Pickering Interfaces either by phone, the website or via e-mail.
WARRANTY
All products manufactured by Pickering Interfaces are warranted against defective materials and workmanship for a period of three years, excluding programmable power supplies, from the date of delivery to the original purchaser. Any product found to be
defective within this period will, at the discretion of Pickering Interfaces be repaired or replaced.
Products serviced and repaired outside of the warranty period are warranted for ninety days.
Extended warranty and service are available. Please contact Pickering Interfaces by phone, the website or via e-mail.
ENVIRONMENTAL POLICY
Pickering Interfaces operates under an environmental management system similar to ISO 14001. Pickering Interfaces strives to fulfil all relevant environmental laws and regulations and reduce wastes and releases to the environment. Pickering Interfaces aims to design and operate products in a way that protects the environment and the health and safety of its employees, customers and the public. Pickering Interfaces endeavours to develop and manufacture products that can
be produced, distributed, used and recycled, or disposed of, in a safe and environmentally friendly manner.

Worldwide Technical Support and Product Information pickeringtest.com

Pickering Interfaces Headquarters

Stephenson Road Clacton-on-Sea CO15 4NL United Kingdom

Tel:

+44 (0)1255-687900

E-Mail: [email protected]

USA Tel: (West) +1 541 471 0700 Tel: (East) +1 781 897 1710 E-mail: [email protected]
France Tel +33 9 72 58 77 00 E-mail [email protected]
Germany Tel: +49 89 125 953 160 E-mail: [email protected]
Sweden Tel: +46 340-69 06 69 E-mail: [email protected]
Czech Republic Tel: +420 558 987 613 E-mail: [email protected]
China Tel: +86 4008 799 765 E-mail: [email protected]

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PRODUCT SAFETY
SAFETY SYMBOLS
The following safety symbols may be used on the product and throughout the product documentation.

MEANING / DESCRIPTION

SYMBOL

PROTECTIVE EARTH (GROUND) To identify any terminal which is intended for connection to an external conductor for protection against electric shock in case of a fault, or the terminal of a protective earth (ground) electrode.

DANGEROUS VOLTAGE To indicate hazards arising from dangerous voltages.

WARNING / CAUTION

An appropriate safety instruction should be followed or caution to a potential hazard

exists.

!

Refer to the relevant instructions detailed within the product manual.

HEAVY

If this product is heavy reference should be made to the safety instructions for

provisions of lifting and moving.

kg

STATIC SENSITIVE To indicate that static sensitive devices are present and handling precautions should be followed.

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CONTENTS
Copyright Statement ………………………………………………………….II
Technical Support and Warranty…………………………………………III
Product Safety …………………………………………………………………..IV
Contents (this page)…………………………………………………………..V
Warnings and Cautions ……………………………………………………..VII
Section 1 Technical Specification………………………………………………………1.1
Section 2 General Description …………………………………………………………..2.1
Mechanical Overview ……………………………………………………2.1 Backplane Overview……………………………………………………..2.2
Section 3 Installation…………………………………………………………………………3.1
Installing the PXI Chassis……………………………………………..3.1 Selecting the Trigger Bus Segment ……………………………….3.3 Selecting the 10MHz Clock Source………………………………..3.4 Installing & Identifying a PXI Chassis in NI MAX ……………..3.5 Installation of Individual Modules………………………………….3.5
Section 4 Chassis Management System …………………………………………….4.1
Status Indicators ………………………………………………………….4.1 Remote Management ……………………………………………………4.1 Installing the Monitor Utility ………………………………………….4.2 Connect Control …………………………………………………………..4.2 Remote Status and Control …………………………………………..4.4 Function Reference ………………………………………………………4.10
Section 5 Trouble Shooting & Maintenance………………………………………..5.1
Appendix A Rack Mounting The Chassis……………………………………………….A.1

19-SLOT PXI MAINFRAME 40-923A

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WARNINGS AND CAUTIONS

WARNING – HAZARDOUS ENVIRONMENTS
This product is not specifically designed for use in hazardous environments, for example in explosive atmospheres. If the product is to be used in hazardous environments we recommend that the user ensures suitable protective measures are taken.

SYMBOL
!

WARNING – DANGER OF ELECTRIC SHOCK
This chassis may be populated with modules that contain hazardous voltages. Before removing any module from the rack remove all supplies and disconnect user I/O signals.
Unused slots in this chassis are populated with blanking plates to prevent access to user I/O signals that may be present. Blanking panels are available to order from Pickering in a variety of slot widths. If the product is not used in this manner for example by using an extender card then additional care must be taken to avoid contact with exposed signals.

SYMBOL

CAUTION – HANDLING OF ELECTROSTATIC-SENSITIVE DEVICES
Certain semiconductor devices used in this equipment are liable to damage due to static voltage. Observe the following precautions when handling these devices in their unterminated state, or sub-assemblies containing these devices:
1. Persons removing sub-assemblies from equipment using these devices must be earthed by a wrist strap and a resistor at the point provided on the equipment.
2. Soldering irons used during the repair operations must be low voltage types with earthed tips and isolated from the mains voltage by a double insulated transformer.
3. Outer clothing worn must be unable to generate static charges.
4. Printed Circuit Boards (PCBs) fitted with these devices must be stored and transported in anti-static bags.

SYMBOL

CAUTION – PRODUCT DOCUMENTATION
Suitably qualified & trained users should ensure that the accompanying documentation is fully read and understood before attempting to install or operate the product.

SYMBOL
!

SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS
All cleaning and servicing requires the equipment to be isolated and disconnected from the power source and user I/O signals (refer to the Maintenance Section). · Appropriate manual handling procedures should be followed as dictated by the weight of the individual module or
the combined weight of the modules & chassis. · Should a fault occur with the module or chassis, immediately isolate and disconnect the incoming power to the
chassis and the user I/O signals. · Ensure the equipment is installed, operated and maintained by trained and authorised personnel. · For suitably equipped products in the event of an emergency press the red “emergency stop” button situated on
the front of the unit.

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SECTION 1 – TECHNICAL SPECIFICATION

SECTION 1 – SPECIFICATION

High Performance 19 Slot PXI/cPCI Backplane 3 Slot PXI System Controller Compatible 600 W Industrial Grade Power Supply Compact Benchtop Footprint Integrated Carrying Handles Low Profile 4 U Rugged Design Remote Chassis Monitoring System Power, Temperature and Fan
Monitoring LEDs Low Audible Operating Noise Optional Rack Mounting Kit RoHS Compliant 3 Year Warranty
Pickering Interfaces’ 40-923A PXI Chassis is a fully compliant 19 slot PXI chassis that can accept any 3U PXI or cPCI module. It is ideal for bench top use or for use in a rack system.
The 40-923A includes all the features and performance required by the PXI standard and supports a control interface or embedded controller and up to 18 additional 3U peripheral modules. The control interface can be provided by a Pickering’s 41-924 PCIe to PXI interface kit, allowing the chassis to be controlled from a PC.
The chassis is fitted with a 600 W industrial grade power supply mounted at the rear of the unit with sufficient capacity to support PXI modules with very high current demands.
An intelligent chassis management system monitors the power supply voltage, internal temperature and cooling fan speed. The current condition of the chassis is displayed on front panel status LEDs and can also be monitored remotely via an RS232 port.

Pickering’s Range of PXI & PXIe Chassis

Chassis Type PXI PXI

Slots Chassis Size Model No. 8 4U Full Rack 40-908 14 4U Full Rack 40-914

PXI

19 4U Full Rack 40-923A

PXI PXIe Hybrid (Gen 3)

8 4U Half Rack 40-924 8 4U Half Rack 42-924

PXIe Hybrid (Gen 3)

18 4U Full Rack 42-925

PXIe Hybrid (Gen 2) PXI with LXI Control*

18 4U Full Rack 42-926 7 4U Half Rack 60-102D

PXI with LXI Control*

18 4U Full Rack 60-103D

PXI with LXI/USB Control 2 1U Half Rack 60-104 PXI with LXI/USB Control 4 2U Half Rack 60-105

PXI with LXI/USB Control* 6 1U Full Rack 60-106

*Includes Scan List Sequencing and optional Triggering function.

Three 120mm fans insure maximum PXI module cooling and an efficient direct convection design allows the chassis to operate over an extended ambient temperature range of 0 °C to +55 °C.
The 40-923A chassis can also be supplied with mounting brackets for installation into a standard 19″ rack. These brackets are adjustable allowing the chassis to be recessed by up to 10cm, allowing clearance for connector blocks and module wiring.
The system slot is compatible with any PC-PXI bridge and any 3 slot wide PXI controller.

40-923A PXI chassis with 63-103-001 optional rack mounting hardware fitted allowing the front of the chassis to be recessed by up to 10 cm in the host rack

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Specifications

Number of Slots: System Slot:

1 system slot, 18 peripheral slots.
Accepts any 3 slot or narrower PXI compatible controller or interface. Pickering Interfaces recommends the 41-924 interface for remotely controlled configurations. Particularly, Adlink controllers are recommended for applications requiring embedded control.

Chassis Backplane:

Incorporates all the features of the PXI specification Rev 2.2. The backplane is 64-bit with PXI triggers, Star Trigger, Local Bus & internal PXI clock.

Cooling Airflow:

Bottom intake, rear exhaust.

Per-slot Cooling Capacity:

25 W at 55 °C ambient 40 W at 40 °C ambient

Fans:

3 off 185.9 cfm fans with filters

Power Supply Input Voltage Range: 90 – 264 VAC full range

Input Frequency: 47 to 63 Hz

Supplied with a 600 W DC output power supply with the following total capacity:

DC Outputs +3.3 V +5 V +12 V -12 V

Max Current 42 A 45 A 15 A 4.75 A

Chassis Monitoring

Front Panel LEDs:

Power supply status Cooling fan status Internal temperature status

Remote Interface: RS232 port on rear panel

Frequency Standard

Source:

Either 10 MHz PXI compliant internal standard or external 10 MHz standard applied to rear panel BNC connector.

Product Order Codes

19-Slot, 3 U, PXI Chassis

40-923A-001

Optional 19″ rack mounting hardware 63-103-001

PCIe to PXI Control Interface Kit

41-924-001-KIT

(for full details of our fast PCI to PXI control Interface

see the 41-924 data sheet).

Mechanical Specification

Cardcage:

Front loading 3 U x 160 mm, 19 slots, IEEE 1101.1, 1101.10 and 1101.11

Dimensions:

Width: 444 mm (17.48″) Height: 178 mm (7.01″) Depth: 455 mm (17.91″)

Weight:

13.4 kg (29.5 lbs) without PXI modules

Operating/Storage Conditions

Operating Conditions

(operating with specified airflow)

Operating Temperature: 0 °C to +55 °C

Humidity:

10 % to 90 % non-condensing

Storage and Transport Conditions

Storage Temperature: Humidity:

-20 °C to +70 °C 10 % to 90 % non-condensing

Safety, CE & RoHS Compliance
All modules are fully CE compliant and meet applicable EU directives: Low- voltage safety EN61010-1:2001, EMC Immunity EN61000-6-1:2001, Emissions EN55011:1998.
The 40-923A Chassis also complies with the European Restriction of Hazardous Substances directive (RoHS).

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SECTION 1 – TECHNICAL SPECIFICATION

Connectivity Solutions
We provide a full range of supporting cable and connector solutions for all our switching products–20 connector families with 1200+ products. We offer everything from simple mating connectors to complex cables assemblies and terminal blocks. All assemblies are manufactured by Pickering and are guaranteed to mechanically and electrically mate to our modules.

Connectors & Backshells

Multiway Cable Assemblies RF Cable Assemblies

Connector Blocks

We also offer customized cabling and have a free online Cable Design Tool that can be used to create custom cable solutions for many applications. Visit: pickeringtest.com/cdt to start your design.
Mass Interconnect We recommend the use of a mass interconnect solution when an Interchangeable Test Adapter (ITA) is required for a PXI or LXI based test system. Our modules are fully supported by both Virginia Panel and MacPanel.
Pickering Reed Relays
We are the only switch provider with in-house reed relay manufacturing capability via our Relay Division. These instrument grade reed relays feature SoftCenterTM technology, ensuring long service life and repeatable contact performance. To learn more, please go to: pickeringrelay.com

Programming
Pickering provide kernel, IVI and VISA (NI & Keysight) drivers which are compatible with all Microsoft supported versions of Windows and popular older versions. For a list of all supporting operating systems, please see: pickeringtest.com/os
The VISA driver support is provided for LabVIEW Real Time Operating Systems (Pharlap and Linux-RT). For other RTOS support contact Pickering. These drivers may be used with a variety of programming environments and applications including:
· Pickering Interfaces Switch Path Manager · National Instruments products (LabVIEW, LabWindows/CVI, Switch Executive, MAX, TestStand, VeriStand, etc.) · Microsoft Visual Studio products (Visual Basic, Visual C++) · Programming Languages C, C++, C#, Python · Keysight VEE and OpenTAP · Mathworks Matlab · Marvin ATEasy · MTQ Testsolutions Tecap Test & Measurement Suite Drivers for popular Linux distributions are available, other environments are also supported, please contact Pickering with specific enquiries. We provide Soft Front Panels (SFPs) for our products for familiarity and manual control, as well as comprehensive documentation and example programs to help you develop test routines with ease. To learn more about software drivers and development environments, please go to: pickeringtest.com/software

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Signal Routing Software
Our signal routing software, Switch Path Manager, automatically selects and energizes switch paths through Pickering switching systems. Signal routing is performed by simply defining test system endpoints to be connected together, greatly accelerating Test System software development. To learn more, please go to: pickeringtest.com/spm
Diagnostic Relay Test Tools
eBIRST Switching System Test Tools are designed specifically for our PXI, PCI or LXI products, these tools simplify switching system fault-finding by quickly testing the system and graphically identifying the faulty relay. To learn more, please go to: pickeringtest.com/ebirst
Three Year Warranty & Guaranteed Long-Term Support
All standard products manufactured by Pickering Interfaces are warranted against defective materials and workmanship for a period of three years from the date of delivery to the original purchaser. Extended warranty and service agreements are available for all our modules and systems with various levels to suit your requirements. Although we offer a 3-year warranty as standard, we also include guaranteed long-term support–with a history of supporting our products for typically 15-20 years. To learn more, please go to: pickeringtest.com/support
Available Product Resources
We have a large library of product resources including success stories, product and support videos, articles and white papers as well as application specific product brochures to assist when looking for the switching, simulation and connection solutions you need. We have also published handy reference books on Switching Technology and for the PXI and LXI standards.

To view, download or request any of our product resources, please visit: pickeringtest.com/resources

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SECTION 2 – TECHNICAL DESCRIPTION

SECTION 2 – TECHNICAL DESCRIPTION
MECHANICAL OVERVIEW
The 40-923A PXI Chassis comprises the following:
· Full width rack mountable chassis also suitable for desk top operation. · 19 slot PXI/cPCI compatible backplane, Rev. 2.2 compliant. · 18 peripheral slots. · System slot accepts controller module up to 3 slots wide. · 600W industrial grade power supply. · Front panel mounted chassis status LEDs. · Rear panel mounted 9-pin D-type connector for chassis monitoring and control via RS232. · Rear panel mounted BNC socket for connection to external 10MHz clock source. · Rear panel mounted IEC plug for connection to the mains supply.

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BACKPLANE OVERVIEW
Interoperability with CompactPCI
The 40-923A is designed to be used with both PXI-compatible products and standard CompactPCI products. Its backplane is compliant with PXI Specification Rev. 2.2.
The signals on Slot 1 of the backplane meet the requirements of the CompactPCI specification for both the peripheral and system modules.
The PXI-specific signals are located on Slot 2 onwards. Signals that are reserved or not used in the CompactPCI 64-bit specification are used as PXI- specific signals. Therefore, peripheral modules that meet the requirements of the CompactPCI 64-bit specification will function in the 40-923A.
Note: Do NOT install CompactPCI peripheral modules which operate with rear I/O in 40-923A due to the possible conflict between rear I/O signals and PXI- specific signals on J2.
System Controller Slot
The System Controller slot is Slot 1 of the chassis as defined by the PXI specification. The 40-923A chassis can accommodate a PXI system controller that occupies up to 3 slots width. As defined in the PXI specification, two controller expansion slots allow the controller to expand to the left to avoid occupying peripheral slots.
Star Trigger Slot
The Star Trigger (ST) slot is Slot 2. This slot has dedicated trigger lines between ST slot itself and slots 3 to 15. The star trigger functionality is intended to provide a precise trigger signal to the peripheral modules by installing a specific star trigger controller module in the ST slot. The star trigger slot can be also used as a general peripheral slot if you do not need the star trigger functionality.
Peripheral Slots
There are 18 peripheral slots in 40-923A (including the Star Trigger controller slot). Each peripheral slot can accommodate a 3U PXI/CompactPCI peripheral module.
Note: DO NOT install a 3U CompactPCI module with rear I/O function in the 40-923A chassis.
Local Bus
The local bus on a PXI backplane is a daisy-chained bus that connects each peripheral slot with its adjacent peripheral slots to the left and right. Each local bus has 13 lines and can transmit analog or digital signals between modules. It can also provide a highspeed side-band communication path that does not affect the PCI bandwidth.
In accordance with the PXI specification, the local bus connects all adjacent slots except slots 1 and 2.
Trigger Bus
The trigger bus is a 8-lines bus that connects all PXI slots in the same PCI segment. The trigger bus can be used to provide an inter-module synchronization mechanism. PXI modules can transmit trigger or clock signals to one another through trigger bus, allowing precisely timed responses to asynchronous external events the system is monitoring or controlling.
The 40-923A provides three trigger bus segments connected by two trigger bus buffers. The first segment is from slot 1 to slot 6, the second from slot 7 to slot 12, and the last from slot 13 to slot 19. A DIP switch on the backplane controls the configuration of these two buffers. This is outlined in Section 3
System Reference Clock
The 40-923A supplies the PXI 10MHz system reference clock (PXI_CLK10) to each peripheral slot for inter-module synchronization. An independent buffer (having source impedance matched to the backplane and a skew of less than 1ns between slots) drives the clock signal generated from a high-precision oscillator to each peripheral slot.
This common reference clock signal can be used to frequency synchronize multiple modules in a PXI chassis. The source of the reference clock for the 40-923A backplane is automatically selected from one of three sources; the internal high-precision standard, the Star Trigger slot or an external clock via the BNC connector on the rear panel. The priority of the automatic clock source selection is described in Section 3.

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1

SECTION 2 – TECHNICAL DESCRIPTION
System Controller

PXI Star Triggers

PXI Trigger Bus Segment & PCI Bus Segment

Bridge

PXI Trigger Bus Segment & PCI Bus Segment

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

LOCAL BUS

Star Trigger Controller Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot Peripheral Slot
Figure 2.1 – 40-923A PXI Chassis Bus Routing 19-SLOT PXI MAINFRAME 40-923A

10MHz Clock & Buffer Circuitry

Page 2.3

Bridge

PXI Trigger Bus Segment & PCI Bus Segment

SECTION 2 – TECHNICAL DESCRIPTION

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SECTION 3 – INSTALLATION

Refer to the Warnings and Cautions at the front of this manual

!

The chassis is designed for indoor use only.

Connecting Safety Ground

WARNING

!

THE 40-923A CHASSIS IS DESIGNED WITH A THREE-POSITION IEC CONNECTOR THAT CONNECTS THE GROUND LINE TO THE CHASSIS GROUND. TO MINIMIZE SHOCK HAZARD, MAKE SURE YOUR ELECTRICAL POWER OUTLET HAS AN APPROPRIATE EARTH SAFETY GROUND THAT IS CONNECTED
WHENEVER YOU POWER UP THE CHASSIS.

IF YOUR POWER OUTLET DOES NOT HAVE AN APPROPRIATE GROUND CONNECTION, YOU MUST CONNECT THE FACTORY WIRE SAFETY GROUND TO THE CHASSIS. TO CONNECT THE SAFETY GROUND, COMPLETE THE FOLLOWING STEPS:

1. Connect a 16 AWG (1.3 mm) wire to a chassis grounding screw using a toothed grounding lug. The wire must have green insulation with a yellow stripe or must be non-insulated (bare).
2. Attach the opposite end of the wire to permanent earth ground using toothed washers or a toothed lug.

INSTALLING THE PXI CHASSIS
Site Considerations
The 40-923A is designed to operate on a bench or in an instrument rack. It is supplied fitted with feet for bench top operation but if you want to use your 40-923A in a rack, mounting flanges will need to be fitted and the feet will have to be removed. Also it should be noted that there is an air intake in the underside of the chassis therefore it is important to fit the chassis in a 5U gap to provide sufficient cooling. For the procedure for fitting the 63-103-001 rack mounting kit to the chassis, refer to Appendix A.

Figure 3.1 – Front of the 40-923A PXI Chassis configured for bench-top operation

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Cooling Considerations
The chassis draws cooling air through an intake in the underside of the chassis directly below the PXI module slots (see Figure 3.2). It is important not to block the passage of air into the intake on the chassis underside. When mounting in a rack, a 1U gap should be provided between the bottom of the chassis and any other instruments to provide an unrestricted air flow into the 40-923A.

Figure 3.2 – Underside of the 40-923A PXI Chassis Showing Air Intake.
The 40-923A expels cooling air through exhaust vents in the rear panel (see Figure 3.3 below). During installation make sure that these outlets are not restricted in any way, and items such as loose cabling are secured out of the way. It is recommended that a clear space of at least 3 inches (76.2mm) is allowed for at the rear of the chassis for unrestricted cooling. To maintain the correct internal air flow, ensure that all unused PXI module slots in the chassis have blank front panels fitted.

Chassis Ground
Lug

Mains Supply Input
(IEC connector)

Fan Control Switch Inhibit Switch

Remote Monitoring Port (see Section 4)

10MHz Reference Clock Input (BNC connector)

Figure 3.3 – Rear of the 40-923A PXI Chassis showing air outlets, switch and connector positions

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SECTION 3 – INSTALLATION

Fan Speed Setting
The 40-923A uses variable speed fans to adjust the cooling level in the chassis. The normal setting is for the fan speed to be automatically controlled, this ensures that for low thermal loads and ambient temperatures the fan speed is slow resulting in low levels of acoustic noise. As the chassis temperature rises the fan’s speed will rapidly rise to increase the cooling. In some circumstances the fans may cycle between high and low speeds.
For most applications users should use the automatic mode, however, if the chassis includes modules with high power dissipation, such as powers supplies or very high capacity switches carrying large currents, users may need to set the fan speed to the permanently high speed setting to lower the stress on the high power module. Using the high speed setting is particularly important when just a few high thermal load modules are fitted since these would take longer to heat the chassis .
A switch on the rear panel of the chassis sets the fan speed to either “AUTO” or “HIGH”. This can also be set using the Chassis Management System which requires the use of the Remote Monitoring port. Once set the fan speed mode setting is stored and will be automatically set to the requested mode when power is applied to the chassis.
Inhibit Switch
The setting of the Inhibit Switch on the rear panel determines how the chassis is powered on and off. In the “DEF” (default) position, the front panel power button turns the power supply on/off, and in the “MAN” (manual) position, the remote controller turns the power supply on/off via the Remote Monitoring port (see Section 4).
SELECTING THE TRIGGER BUS SEGMENT
The 40-923A provides three trigger bus segments connected by two trigger bus buffers. The first segment is from slot 1 to slot 6, the second from slot 7 to slot 12, and the last from slot 13 to slot 19. A DIP switch on the left hand end of the backplane, next to the system controller slot, controls the configuration of these two buffers. The function of these switches and the corresponding trigger bus settings are shown in Tables 3.1 and 3.2 below:

Switch Number

Trigger Bus DIP Switch Function 10MHz clock supplied to peripheral slots

Switch Positions

P1

–

P2

Enables/Disables (On/Off) bus buffer between first and second segments.

P2 P4 P1 P3 P5

P3

Enables/Disables (On/Off) bus buffer between second and

ON

third segments.

P4

Determines direction of the bus buffer between first and second segments, with high left to right and low right to left.

1 2345

P5

Determines direction of the bus buffer between second and third segments, with high left to right and low right to left.

Table 3.1 – Trigger Bus DIP Switch Functions

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P2 X OFF ON ON ON OFF OFF ON ON

P3 X OFF ON OFF OFF ON ON ON ON

P4 X X ON ON OFF OFF OFF OFF OFF

Trigger Bus Settings

P5

Configuration

Description

X X ON OFF OFF ON OFF OFF ON

N/A All Segments Isolated
1 2 3 1 2 1 2 2 3 2 3
1 2 3 1 2 3

N/A All Segments Isolated Segments 1 to 2 & 3
Segments 1 to 2 Segments 2 to 1 Segments 2 to 3 Segments 3 to 2 Segments 3 to 1 & 2 Segments 2 to 1 & 3

Table 3.2 – Trigger Bus Settings

SELECTING THE 10MHz REFERENCE CLOCK SOURCE
The PXI reference clock can be used to synchronize the modules hosted by the chassis. The 40-923A can source the PXI clock from an internal high accuracy oscillator, an external clock reference (via a BNC connector on the rear panel) or from the star trigger slot. The source of the 10MHz clock is detected by the backplane and set automatically, Table 3.3 shows the priority of the clock source.

System Timing Slot (slot 2) No Clock Present No Clock Present
10MHz Clock Present 10MHz Clock Present

Clock Source Priority BNC Connector on Rear Panel
No Clock Present 10MHz Clock Present
No Clock Present 10MHz Clock Present

10MHz clock supplied to peripheral slots
The clock is generated by the backplane
The clock from the BNC connector is routed to all
peripheral slots
The clock from the System Timing slot is routed to all
peripheral slots
The clock from the System Timing slot is routed to all
peripheral slots

Table 3.3 – Priority for the automatically selected 10MHz clock

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The automatically selected clock source is indicated by three LEDs on the backplane next to the controller slot at the far left of the chassis:

Right Hand LED: 10MHz clock is generated by the backplane.

Middle LED:

10MHz clock is sourced from the rear mounted BNC connector.

Left Hand LED: 10MHz clock is sourced from the System Timing slot.

INSTALLING AND IDENTIFYING A PICKERING PXI CHASSIS IN NI MAX
Any non-NI PXI chassis will not be identified by manufacturer and model in MAX unless the appropriate files are added to the controller system.
This lack of identification is not usually a problem, the chassis will appear as (Unidentified) in the MAX list, but this should not affect its performance in any way.
In order to make MAX fully identify a Pickering chassis, follow these instructions:
If you are obtaining the configuration ini files from the Pickering “Software Installation” disk then ignore steps 1, 2 and 6a, alternatively if you are downloading these files ignore step 6b.
1. Copy the required .ini file from the download location to your PC using the following link: http://www.pickeringtest.info/downloads/drivers/Chassis/
2. Copy the files to any convenient location on your PC, for example to the Desktop.
3. Launch MAX and expand: My System, Devices and Interfaces, PXI System.
4. The Pickering chassis will appear in the list followed by the word (Unidentified).
5. Right click on the entry and select: Identify As.
6a. Select the entry appropriate for the chassis, if it is not present, then select “Other” and browse to the location of the file downloaded above.
6b. Select the entry appropriate for the chassis, if it is not present, then select “Other” and browse to the location of your chassis .ini file on the Pickering “Software Installation” Disk, in the folder: “Drivers_PXIPXI Chassis Identification”.
7. Change the file filter to “All Files (.)” and select the appropriate ini file.
8. The chassis should now be correctly identifed in MAX.

INSTALLATION OF INDIVIDUAL MODULES
Please refer to the module user manual for the correct installation procedure of individual PXI modules.

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SECTION 4 – CHASSIS MANAGEMENT SYSTEM

STATUS INDICATORS
The 40-923A has a built in management system that monitors the internal chassis temperature and varies the fan speed accordingly. The system also monitors the power supply’s voltage rails and speed of the fans and indicates the chassis’ status on three front panel LEDs. The meaning of these LEDs is outlined in the table below.

LED

Status

Name Power
Fan Temp

Color

On

Off

Blue Green Amber

DC voltage supply is normal
Fans operating normally
N/A

Chassis is powered down
Chassis is powered down
Temperature is normal

Blinking
One or more power rails exceeds threshold settings (defaults are +5%, – 3% for 5V and
3.3V ±5% for +12V and – 12V)
One or more fans falls below threshold speed (default is 800RPM)
One or more temperature sensors exceeds threshold temperature (default 70°C)

Table 4.1 – 40-923A Status LED Conditions

Figure 4.1 – 40-923A Status LED Positions

The status information can also be accessed via the RS232 port on the chassis’ rear panel. This remote monitoring and control interface is described in the following section.
REMOTE MANAGEMENT
The 40-923A chassis provides an advanced remote monitoring and control function. The chassis’ status, including internal temperature, fan speed, and DC voltages, are exported via an RS-232 port located on the rear of the unit allowing the monitoring of the system on a remote computer. You may also use the remote computer to turn the system on or off via the monitoring port by sending appropriate software commands.
To remotely monitor and control the 40-923A, you need to connect the monitoring port to a remote computer using a standard RS-232 cable with 9-pin D-type connectors.
Note: The remote monitor port is Rx-Tx/Tx-Rx crossed. You need to use a RS-232 cable which is Rx-Rx/Tx-Tx connected for the remote monitoring function.

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INSTALLING THE MONITOR UTILITY
You can find the setup file to install the remote monitoring utility and function library in the supplied CD.
To install the monitoring utility: 1. Connect a USB CD-/DVD-ROM drive to the system controller. 2. Place the supplied CD in the optical drive. 3. Locate the monitoring utility in the folder: X:DriversPXI chassis Monitor (system 40)pxi_monitor_setup when using autorun or: X:Drivers_PXIPXI Chassis Monitorpxi_monitor_setup when in folder view (where X: denotes your CD-ROM drive). 4. Double-click on the Setup.exe file to begin installation.
CONNECT CONTROL
The Connect Control section connects and disconnects the link between the 40-923A and the remote computer, displays chassis status log data, and saves and loads threshold settings.
To establish a connection between the remote computer and the 40-923A, first the com port has to be set up: 1. Make sure you have proper connection between remote monitoring port of the 40-923A and the RS232 port of the remote computer. 2. Launch the PXISRemoteMonUtil.exe on the remote computer. 3. On the Remote Monitor Utility Interface, select the COM port number on the remote computer that is connected to the 40-923A (COM1, for example).

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Figure 4.2 – 40-923A Remote Monitor Utility Interface 19-SLOT PXI MAINFRAME 40-923A

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SECTION 4 – CHASSIS MANAGEMENT SYSTEM

4. Select “Connect” to initiate a connection. 5. Select “Run” to commence monitoring system status. 6. Select “Stop” to cease monitoring.
Chassis Status Log With the Chassis Status Log function, monitored data can be recorded. Clicking the “Log Chassis Status” button opens the Log Options window as shown:

Figure 4.3 – 40-923A Log Options Dialog Window
The name of the log file can be entered, and the “Overwrite” or “Append” option selected to replace or add to an existing log file. The time delay in seconds between logging operations can be set by entering a numerical value in the “Log Period” box. Clicking “Start” begins the log. Clicking on the “Over Threshold Statistics” button displays information regarding thresholds being exceeded.
Threshold Settings This is used to save or load all threshold and control settings. Clicking “Save Threshold Settings” saves all current settings, clicking “Load Threshold Settings” loads all settings from the saved file, and clicking “Load Default Threshold” resets all threshold settings to the default values.
Version Info Displays the current firmware version.

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REMOTE STATUS AND CONTROL
This interface sets the operation and threshold settings for the 40-923A chassis, including remote chassis on/off, target temperature, fan mode, and threshold settings for DC voltage, temperature, and cooling fan speed.

Figure 4.4 – 40-923A Remote Status and Control Inteface
Remote On/Off
This displays the on/off status of the 40-923A chassis. Choosing “Power ON” or “Power OFF” and clicking “Set” directly powers the chassis on or off. The remote on/off function is also controlled by the setting of the Inhibit Switch on the rear panel. In the “DEF” (default) position, the front panel power button turns the power supply on/off, and in the “MAN” (manual) position, the power supply can be turned on/off remotely using the graphical interface.
Target Temperature
The cooling fans run at different speeds based on the monitored temperature when the FAN switch on the rear panel is set to “AUTO”. “Target Temp” indicates the temperature when the fans are at 100%. Using the default of 50°C as an example, the fans run at 40% when all temperature readings are less than 25°C, and begin to increase speed when any reading exceeds 25°C. The fans run at 100% speed if any temperature reading exceeds 50°C (Target Temperature). Target Temp can be set by entering the desired target temperature value in the field and clicking “Set”. The fan speed and temperature relationship is outlined in Figure 4.5.

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SECTION 4 – CHASSIS MANAGEMENT SYSTEM
E D

Fan Speed
(%)

40 A

C B

0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 Highest temperature reported by the 8 backplane sensors (ºC)
Figure 4.5 – Chassis Temperature to Fan Speed Relationship Graph

Legend A B C D E

Temperature 0ºC 45ºC 70ºC
25ºC to 70ºC 25ºC

Parameter
Minimum chassis temperature at which the fans’ speed begin to ramp-up to the 25°C level.
Maximum chassis temperature at which the fans’ speed begin to ramp-up to the 70°C level.
Highest maximum chassis temperature at which the fans reach maximum speed.
45° range within which the maximum chassis temperature (at which the fans reach maximum speed) can be set.
Lowest maximum chassis temperature at which the fans reach maximum speed.

Table 4.2 – Legend for Chassis Temperature to Fan Speed Relationship Graph

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Fan Speed
Auto/Full status of the 40-923A’s cooling fans is shown here. “Auto” is displayed when the cooling fans are set to automatically change with the temperature of the chassis and “Full” is displayed when the fans are set to run permanently at full speed. The cooling fans’ mode is changed by selecting “Auto” or “Full” and clicking the “Set” button.
Alarm Threshold
This shows the active alarm threshold settings which includes DC voltage, temperature and fan speed. This also allows the user to enter a new threshold setting by entering the desired value and clicking “Set Threshold Settings”.

CHASSIS STATUS
The Chassis Status area of the control interface shows the voltage levels of the power supply, the current chassis temperature and the speed of the cooling fans.
DC Voltage
The monitored 5V AUX, 3.3V, 5V, 12V, and -12V power rail readings are shown here. The status is shown as “Normal” when the readings are within the threshold range, and “Abnormal” when the readings are outside the threshold range.
Chassis Temperature
Eight temperature sensors are monted on the top of the backplane. These are numbered T1 to T8 from left to right and provide the control interface with chassis temperature readings. When status is shown as “Normal” the readings are within the threshold value (default of 70°C), the status is “Abnormal” when the readings exceed the threshold value.
Fan Speed
This shows the monitored speed of the three cooling fans. The status indicates “Normal” when the readings are above the threshold value (default of 800 RPM), and “Abnormal” when the readings fall below the threshold value.

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Using the Monitoring/Control Function Library
The monitoring/control function library can be used to create a customized program that can be used to remotely manage the 40-923. The function library consists of three data structures as shown below. Data Structure – Chassis Status This includes power status, fan status, temperature status and power supply voltage status.

typedef struct tagChassisStatus

{

BYTE PowerStatus;

//Power on/off Status

//Fan status and RPM BYTE Fan1Status; BYTE Fan2Status; BYTE Fan3Status;

//Fan#1 status //Fan#2 status //Fan#3 status

int Fan1RPM; int Fan2RPM; int Fan3RPM;

//Fan#1 speed in RPM //Fan#2 speed in RPM //Fan#3 speed in RPM

//Temperature sensor status and reading in degree centigrade

BYTE Temp1Status;

//Temperature sensor#1 status

BYTE Temp2Status;

//Temperature sensor#2 status

BYTE Temp3Status;

//Temperature sensor#3 status

BYTE Temp4Status;

//Temperature sensor#4 status

BYTE Temp5Status;

//Temperature sensor#5 status

BYTE Temp6Status;

//Temperature sensor#6 status

BYTE Temp7Status;

//Temperature sensor#7 status

BYTE Temp8Status;

//Temperature sensor#8 status

float Temp1Reading; float Temp2Reading; float Temp3Reading; float Temp4Reading; float Temp5Reading; float Temp6Reading; float Temp7Reading; float Temp8Reading;

//Temperature sensor#1 reading (°C) //Temperature sensor#2 reading (°C) //Temperature sensor#3 reading (°C) //Temperature sensor#4 reading (°C) //Temperature sensor#5 reading (°C) //Temperature sensor#6 reading (°C) //Temperature sensor#7 reading (°C) //Temperature sensor#8 reading (°C)

//DC status and reading

BYTE DC1Status;

//DC 5Vsb status

BYTE DC2Status;

//DC 3.3V status

BYTE DC3Status;

//DC 5V status

BYTE DC4Status;

//DC 12V status

BYTE DC5Status;

//DC -12V status

float DC1Reading; float DC2Reading; float DC3Reading; float DC4Reading; float DC5Reading;

//DC 5Vsb voltage //DC 3.3V voltage //DC 5V voltage //DC 12V voltage //DC -12V voltage

} ChassisStatus;

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Data Structure – Chassis Setting This includes target temperature, temperature threshold, fan speed threshold and power supply voltage threshold.

typedef struct tagChassisSetting

{

int TargetTemp;

//Target Temperature

int ThresholdTemp; int ThresholdFan;

//Temperature Threshold //Fan Speed Threshold

int Threshold5V_H; int Threshold5V_L; int Threshold3V3_H; int Threshold3V3_L; int Threshold12V_H; int Threshold12V_L; int ThresholdN12V_H; int ThresholdN12V_L;

//5V High Threshold //5V Low Threshold //3.3V Hight Threshold //3.3V Low Threshold //12V High Threshold //12V Low Threshold //-12V High Threshold //-12V Low Threshold

BYTE FanFullSpeed;

//Fan in Full or Auto Speed Mode

} ChassisSetting;

Data Structure – MCU Version
This includes MCU Code Version, Major Number, and Minor Number.
typedef struct tagMCUVersion {
BYTE MajorNo; BYTE MinorNo;
} MCUVersion;

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SECTION 4 – CHASSIS MANAGEMENT SYSTEM

Data Structure Variables The variables in the data structure are described below:

Variable
PowerStatus
Fan1Status Fan2Status Fan3Status Fan1RPM Fan2RPM Fan3RPM Temp1Status Temp2Status Temp3Status Temp4Status Temp5Status Temp6Status Temp7Status Temp8Status Temp1Reading Temp2Reading Temp3Reading Temp4Reading Temp5Reading Temp6Reading Temp7Reading Temp8Reading DC1Status DC2Status DC3Status DC4Status DC1Reading DC2Reading DC3Reading DC4Reading

Description

Type

Power On/Off status

BYTE

Fan#1 operating status
Fan#2 operating status
Fan#3 operating status Fan#1 speed in RPM Fan#2 speed in RPM Fan#3 speed in RPM Temperature sensor #1 status Temperature sensor #2 status Temperature sensor #3 status Temperature sensor #4 status Temperature sensor #5 status Temperature sensor #6 status Temperature sensor #7 status Temperature sensor

8 status Reading of temperature sensor #1 in °C Reading of temperature sensor

2 in °C Reading of temperature sensor #3 in °C Reading of temperature sensor

4 in °C Reading of temperature sensor #5 in °C Reading of temperature sensor

6 in °C Reading of temperature sensor #7 in °C Reading of temperature sensor

8 in °C DC +12V status DC +5V status DC +3.3V status DC -12V status DC +12V

voltage reading DC +5V voltage reading DC +3.3V voltage reading DC -12V voltage reading

BYTE
BYTE
BYTE int int int BYTE BYTE BYTE BYTE BYTE BYTE BYTE BYTE float float float float float float float float BYTE BYTE BYTE BYTE float float float float

Value 0: Off 1:On 0: Normal 1: Abnormal 2: Disabled 3: Stopped RPM value
0: Normal 1: Abnormal
Temperature Value
0: Normal 1: Abnormal
Voltage value

Table 4.3 – Data Structure Variables for the Chassis Management System

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FUNCTION REFERENCE

InitCOM

Description: Initializes the remote computer COM port connected to the remote monitoring port of the 40-923A.

Syntax:

HANDLE InitCOM(LPCWSTR com)

Parameter: com

A string denotes the COM port. Can be COM1 ~ COM8.

Return Value: A handle to the initialized COM port. If the function returns NULL, the initialization of COM port failed.

Example:

HANDLE hCOM; hCOM= InitCOM(“COM1”);

GetChassisStatus

Description:
Gets the chassis status and stores the status in a ChassisStatus structure. You can invoke this function periodically to update the chassis status.

Syntax:

BOOL GetChassisStatus(HANDLE hCom, ChassisStatus* Status)

Parameters: hCom Status

The initialized COM port.
ChassisStatus data structure that stores the chassis status in which PowerStatus, Fan1Status, Fan2Status, Fan3Status, Fan1RPM, Fan2RPM, Fan3RPM, Temp1Status ~ Temp8Status, Temp1Reading ~ Temp8Reading, DC1Status ~ DC5Status, DC1Reading ~ DC8Reading will be updated.

Return Value: TRUE if the function succeeded. FALSE if the function failed.

Example:

ChassisStatus status;
BOOL ret; ret= GetChassisStatus(hCom, &status);

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SECTION 4 – CHASSIS MANAGEMENT SYSTEM

GetThreshold

Description:
Acquires chassis fan speed, temperature, and voltage threshold settings and stores the results in a ChassisSetting structure..

Syntax:

BOOL GetThreshold(HANDLE hCom, ChassisSetting* Setting)

Parameters: hCom Setting

The initialized COM port.
ChassisSetting data structure that stores the chassis status in which TargetTemp, ThresholdTemp, Threshold-Fan, Threshold5V_H, Threshold5V_L, Threshold3V3_H, Threshold3V3_L, Threshold12V_H, Threshold12V_L, ThresholdN12V_H, ThresholdN12V_L will be updated.

Return Value: TRUE if the function succeeded. FALSE if the function failed.

Example:

ChassisSetting setting;
BOOL ret; ret= GetThreshold(hCom, &setting);

GetMCUVersion

Description: Acquires the MCU code version number and stores the result in a ChassisStatus structure.

Syntax:

BOOL GetMCUVersion(HANDLE hCom, MCUVersion* Version)

Parameter: com

The initialized COM port.

Version

MCUVersion data structure that stores the chassis status in which MajorNo, MinorNo will be updated.

Return Value: TRUE if the function succeeded. FALSE if the function failed.

Example:

MCUVersion version;
BOOL ret; ret= GetMCUVersion(hCom, &version);

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SetChassisPowerOn

Description: Powers on the 40-923A.

Syntax:

BOOL SetChassisPowerOn (HANDLE hCom)

Parameter: com

The initialized COM port.

Return Value: TRUE if the function succeeded. FALSE if the function failed.

Example:

BOOL ret; ret= SetChassisPowerOn (hCom);

SetChassisPowerOff

Description:
Powers off the 40-923A. You should shut down the system controller via the operating system before turning off the chassis power.

Syntax:

BOOL SetChassisPowerOff (HANDLE hCom)

Parameter: com

The initialized COM port.

Return Value: TRUE if the function succeeded. FALSE if the function failed.

Example:

BOOL ret; ret= SetChassisPowerOff (hCom);

NOTE: To enable PowerONPowerOff functions to work the inhibit switch on the rear panel has to be in MAN position

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SECTION 4 – CHASSIS MANAGEMENT SYSTEM

SetFanSpeedMax

Description: Set fan speed control as Max mode (force the fans to operate in full speed)

Syntax:

BOOL SetFanSpeedMax (HANDLE hCom)

Parameter: com

The initialized COM port

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; ret= SetFanSpeedMax (hCom);

SetFanSpeedAuto

Description: Set fan speed control as Auto mode (automatically control fan speed according to internal temperature).

Syntax:

BOOL SetFanSpeedAuto (HANDLE hCom)

Parameter: com

The initialized COM port

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; ret= SetFanSpeedAuto (hCom);

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SetTargetTemp

Description: Sets a Chassis target temperature that fan the speed will automatically adjust to meet.

Syntax:

BOOL SetTargetTemp(HANDLE hCom ,int temp)

Parameter: com

The initialized COM port

temp

Target temperature (from 25 to 70°C)

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; int temp = 50; ret= SetTargetTemp(hCom,temp);

SetFanAlarm

Description: Sets chassis fan speed threshold, the level under which the alarm will be triggered.

Syntax:

BOOL SetFanAlarm(HANDLE hCom ,int speed)

Parameter: com

The initialized COM port

speed

Fan speed threshold (in rpm, multiples of 100, such as 500, 600, 700…, range 0 to 10000)

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; int speed = 1000; ret= SetFanAlarm(hCom,speed);

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SECTION 4 – CHASSIS MANAGEMENT SYSTEM

SetTempAlarm

Description: Sets chassis temperature threshold, which, if exceeded by a sensor reading, triggers the temperature alarm.

Syntax:

BOOL SetTempAlarm(HANDLE hCom ,int temp)

Parameter: com

The initialized COM port

temp

Temperature alarm threshold ( unit: °C, range : 0~100)

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; int temp = 60; ret= SetTempAlarm(hCom,temp);

Set5VAlarm

Description: Sets the chassis DC 5V threshold, outside which the 5V voltage rail level triggers the alarm.

Syntax:

BOOL Set5VAlarm(HANDLE hCom ,float H, float L)

Parameter: com

The initialized COM port

H

DC 5V alarm upper threshold (voltage, range 0 to 1.0)

L

DC 5V alarm lower threshold (voltage, range 0 to 1.0)

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; float high = 0.25; float low = 0.25; ret= Set5VAlarm(hCom, high, low);

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Set3V3Alarm

Description: Sets the chassis DC 3V3 threshold, outside which the 3V3 voltage rail level triggers the alarm.

Syntax:

BOOL Set3V3Alarm(HANDLE hCom ,float H, float L)

Parameter: com

The initialized COM port

H

DC 3.3V alarm upper threshold (voltage, range 0 to 0.66)

L

DC 3.3V alarm lower threshold (voltage, range 0 to 0.66)

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; float high = 0.15; float low = 0.15; ret= Set3V3Alarm(hCom, high, low);

Set12VAlarm

Description: Sets the chassis DC 12V threshold, outside which the 12V voltage rail level triggers the alarm.

Syntax:

BOOL Set12VAlarm(HANDLE hCom ,float H, float L)

Parameter: com

The initialized COM port

H

DC 12V alarm upper threshold (voltage, range 0 to 2.4)

L

DC 12V alarm lower threshold (voltage, range 0 to 2.4)

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; float high = 0.6; float low = 0.6; ret= Set12VAlarm(hCom, high, low);

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SECTION 4 – CHASSIS MANAGEMENT SYSTEM

SetN12VAlarm

Description: Sets the chassis DC -12V threshold, outside which the -12V voltage rail level triggers the alarm.

Syntax:

BOOL SetN12VAlarm(HANDLE hCom ,float H, float L)

Parameter: com

The initialized COM port

H

DC -12V alarm upper threshold (voltage, range 0 to 2.4)

L

DC -12V alarm lower threshold (voltage, range 0 to 2.4)

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; float high = 0.6; float low = 0.6; ret= SetN12VAlarm(hCom, high, low);

CloseCOM

Description: Closes the initialized COM port.

Syntax:

BOOL CloseCOM (HANDLE hCom)

Parameter: com

The initialized COM port.

Return Value: TRUE if the function succeeded, FALSE if the function failed.

Example:

BOOL ret; ret= CloseCOM (hCom);

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SECTION 5 – TROUBLE SHOOTING & MAINTENANCE

! Refer to the Warnings and Cautions at the front of this manual
PERIODIC MAINTENANCE
This product does not require any periodic maintenance.

Installation Problems
Inability to start the system frequently results from incorrect installation of the system controller, peripheral modules, or other components. Before starting the system, please ensure that:
The system controller is properly installed and secured All peripheral modules are properly seated in their slots All cables are properly connected to the system controller and peripheral modules All installed peripheral modules are compatible for use in the chassis The power cable is securely plugged into the chassis’ power connector and the power outlet
If the system fails to start when all installation conditions are met, remove all installed peripheral modules and try powering up again. If the system starts normally, power down the chassis and install one peripheral module at a time, each time powering up the chassis. Also try installing the modules into different slots until the chassis starts normally.
Basic Trouble Shooting

Problem

Ensure That:

System fails to power up

The power cable is securely plugged into the chassis and wall socket/power strip The wall socket/power strip is live The main power switch on the back of the chassis is turned on The standby power button on the chassis front panel is turned on

No video output on the external display (if fitted)
Power LED (blue) is blinking

The external display is functioning properly Display settings support external video
There is no short circuit by removing all PXI modules (PXI controller and peripheral modules). If the signal persists, contact your dealer for further assistance

Fan LED (green) is blinking

The fan is unobstructed. If the signal persists, contact your dealer for further assistance.

Temperature Airflow from the outlet apertures is unobstructed and steady, also ensure that adequate clear-

LED (amber) is ance for the intake apertures is provided. If the temperature of exhausted air is normal (below

blinking

50°C) but the temperature LED is still blinking, contact your dealer for further assistance.

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Handling the Chassis
The 40-923A is designed for both rack-mount and benchtop use. When transporting or carrying the chassis, it is recom-mended that the handle be used, being designed to support the weight of the chassis. The 40-923A weighs 14.5 kg, please take care when moving the chassis to avoid any possible injury.
Cleaning the Exterior
Make sure that the system is turned off before cleaning the chassis exterior. Wipe the exterior with a clean cloth starting from areas that easily accumulate dust or dirt such as the area in and around the chassis and power supply air intake apertures.
Power Requirements
Make sure that the power cord is in good condition before plugging it into the system. It is important to check the reliability of the power source. The 40-923A power supply is capable of handling 100 to 240VAC within the 50 Hz to 60 Hz range. Do not connect the 40-923A to an already overloaded circuit.

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APPENDIX A – RACK MOUNTING

APPENDIX A – RACK MOUNTING THE CHASSIS
To allow the 40-923A chassis to operate in a 19 inch equipment rack it can be simply mounted on a standard equipment shelf, or preferably, it can be fitted with the 63-103-001 rack mounting kit. The kit consists of side brackets that allow the chassis to be secured in a rack using fixing holes at the front and rear. Additionally, the side brackets are adjustable allowing the entire chassis to be recessed into the rack enabling front clearance for connectors and mass interconnect modules.
The following procedure describes the steps required for fitting the rack mounting kit.

1. On the left side of the chassis remove the carrying handle 1 by first removing the two fixing screws using a cross head screwdriver.
2. Remove the four feet on the right side of the chassis 2 by first removing their fixing screws with a cross head screwdriver.
3. Fit the two handles 3 to two of the mounting brackets 4 with the supplied M4 screws.
4. Fit the two brackets with handles to the sides of the chassis with the supplied M4 screws so that the rack mounting flange is at the front of the chassis.
5. Fit the two brackets without handles to the sides of the chassis with the supplied M4 screws so that the rack mounting flange is at the back of the chassis.
6. The required distance between the front of the rack and the front of the chassis can be set by loosening the fixing screws and sliding each side bracket to the correct position for the host rack.
7. Once the side brackets have been set to the position required and their fixing screws tightened, the chassis can be installed into the host rack with eight screws (not supplied). Make sure that there is a 1U gap underneath the chassis to allow the correct flow of cooling air.

19-SLOT PXI MAINFRAME 40-923A

Page A.1

APPENDIX A – RACK MOUNTING

pickering

40-923A PXI Chassis With Rack Mounting Kit Fitted

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19-SLOT PXI MAINFRAME 40-923A