SIEMENS PXC7 Automation Stations Instruction Manual

Desigo™
Automation stations
PXC7
Instruction Manual

PXC7 Automation Stations

To automate building automation and control systems

• Modular automation station and system controller for HVAC and building automation and control systems
• BACnet/IP communication (BTL certified)
• BACnet Secure Connect communication
• Comprehensive management and system functions
• Freely programmable automation stations for maximum flexibility
• Connects TXM input/output modules
• KNX PL-Link bus to connect sensors and operator units (including bus power)
• Integrates Modbus RTU and/or Modbus TCP data points or subsystems
• Integrates BACnet MS/TP devices
• Web interface
• Remote access via Cloud

Functions

Optimized, flexible automation station for HVAC and building automation and control systems

• System functions (alarming, scheduling, trending, access protection with individually definable user profiles and categories)

• System controller for system networks with PXC3, PXC4, PXC5, PXC7 and DXR controllers over BACnet/IP, BACnet/SC, or BACnet MS/TP

• Integrates data points and/or subsystems via Modbus RTU and/or Modbus TCP

• Integrates MS/TP devices

• The following functions are available with KNX PL-Link bus:
  – Communication with room operator units and sensors.
  – Plug-and-play connection of Siemens field devices with KNX PL-Link.

• Engineering and commissioning with the ABT Site Tool using graphical function charts

• Freely programmable. All function blocks, available in libraries, can be graphically connected.

• BTL tested BACnet communication on IP (BACnet/IP or BACnet/SC) or BACnet MS/TP, in compliance with the BACnet standard including B-BC profile (Rev. 1.15)

• BACnet Secure Connect communication as BACnet/SC hub and BACnet/SC node

• Generic operation via embedded web interface

• Cloud connectivity for remote access

• 2-port Ethernet switch for low-cost cabling

• WLAN interface for engineering and commissioning

• Operating voltage AC 24 V or DC 24 V

• DIN rail or screw mounting

• Plug-in screw terminal blocks

Type summary

Standardized hardware
PXC7.E400S, M, and L are based on the same hardware and all have the same look and feel. Interfaces like RS485 are enabled and disabled according to the type specification.

100
Number of BACnet MS/TP devices in a field level network| up to 60 3)| up to 120 3)

(2 x 60)

| up to 240 3)

(4 x 60)

Number of KNX PL-Link devices| up to 64| up to 64| up to 64
Number of configurable RS485 interfaces either for integration of Modbus RTU or BACnet MS/TP| 1| 2| 4

1. For details on engineering, see PXC4, PXC5 & PXC7 Planning overview, A6V13054435.
2. KNX PL-Link DPs do not count as integration points. For KNX PL-Link, only the limitation of BACnet objects have to be considered.
3. Depending on the behavior of the third-party MS/TP devices.

TXM input/output modules

CM2N8173
Super universal module with/without local operation and LCD| TXM1.8X, TXM1.8X- ML| CM2N8174
Relay module with/without local operation| TXM1.6R, TXM1.6R-M| CM2N8175
Resistance measuring module (for Pt100 4- core cable)| TXM1.8P| CM2N8176
Triac module (only if PXC7.E400 is powered with AC)| TXM1.8T| CM2N8179
Digital input and relay module| TXM1.4D3R| CM2N8188
 |  |
Power module| TXS1.12F10| CM2N8183
Bus connection module| TXS1.EF10| CM2N8183
Island bus extension module| TXA1.IBE| CM2N8184

For details, see planning overview A6V13054435 and data sheets.
KNX PL-Link devices

QMX3.P74

For details, see planning overview A6V13054435 and data sheets.
Desigo Control Point

Product documentation

Related documents such as environmental declarations, CE declarations, etc., can also be downloaded at the following Internet address: www.siemens.com/bt/download

Technical and mechanical design

| 4| Service button (ID on network and WLAN on/off)
---|---|---
5| 2-port Ethernet switch (with 2 LEDs per port for display purposes)
6| Ethernet port (for future use)
7| Plug-in terminal block with screw terminals KNX PL-Link
8| Plug-in terminal blocks with screw terminals Power supply
9| Plug-in terminal block with screw terminals Digital input (for future use)
10| Data matrix code
11| Connection for TXM modules (island bus)
12| Plug-in terminal block with screw terminals M-bus (for future use)
13
14
15
16| Plug-in terminal block with screw terminals (either Modbus or MS/TP)
COM1 interface
COM2 interface
COM3 interface
COM4 interface
Activation of COM 1/2/3/4 depending on Type (S,M,L)
17| DIP switches for bus termination and polarization
18| QR code for default WLAN access Description in technical data
19| Date/series and serial number
1| Plastic housing| 20| Slider for mounting on DIN rails
2| Battery cover| 21| Eyelets for cable ties
3| LEDs for communication and state| 22| Holes for wall mounting

LED displays

No connection Network traffic
Yellow| Steady ON Steady OFF| Link 100 Mbps
Link 10 Mbps

| RUN| Green| Steady ON Steady OFF Flashing| Device operational Device not operational Start-up or program stop
RUN| Red| Steady OFF Steady ON Rapid flashing| OK
HW or SW fault
Firmware or application missing/corrupted
****| Blue| Steady ON Steady OFF| Cloud connection OK No cloud connection
BAT| Red| Steady OFF Steady ON| Optional battery OK
Optional battery empty – replace
TXM| Yellow| Flashing Steady OFF| Communication
No communication with TXM modules
SVC| Red| Steady OFF Flashing| OK
Device not configured
Flashing after wink command| Device ID after receipt of wink command

WLAN| Blue| Steady OFF| WLAN inactive
Steady ON| WLAN active and at least one WLAN client connected
Flashing| WLAN active and no WLAN client connected
| COM…| Yellow| Flashing
Steady OFF| Communication
(TX: Transmit, RX: Receive)
No communication to subsystem
KNX| Yellow| Flashing
Steady OFF| Communication
(TX: Transmit, RX: Receive)
No communication to subsystem
M-bus| Yellow|  | Reserved for future use
| Service button|  | Press 0.2 … 1 s
Press 1 … 3 s| ID in the network WLAN enable/disable
WLAN disables automatically after 10 minutes if no client is connected
Factory reset| 1. Power off the device.
2. Power on the device.
3. Wait until all LEDs light up and turn off again, then press the Service button.
4. Keep the Service button pressed until all LEDs light up, then release the button. All LEDs go off, the device restarts.
5. Wait until the device has fully started – unconfigured (green RUN LED and red SVC LED are flashing)

Notes

Safety & Security

CAUTION
National safety regulations
Failure to comply with national safety regulations may result in personal injury and property damage.

• Observe national provisions and comply with the appropriate safety regulations.

Mounting position and ambient temperature
The devices can be snapped onto standard rails or screwed onto a flat surface.
Plug-in screw terminals connect power and interfaces.

Ambient temperature -5…50 °C (23…122 °F)| Ambient temperature -5…45 °C (23…113 °F)
---|---
● Wall, horizontal
–   From left to right
–   From right to left| ● Overhead
● Wall, vertically
–   From top to bottom
–   From bottom to top
● On a horizontal surface

CAUTION
Risk of overheating for failure to comply with ambient temperature
Burning and damage to the device

• Ensure sufficient ventilation to comply with the permissible ambient temperature within the panel or installation box. The temperature must be at least 10 K (18° F) lower outside the installation box.

Installation

WARNING
Electric shock
Incorrect installation of the device may lead to electric shock injuries when touching the device!

• Install the device in a lockable cabinet or use terminal covers.
• Do not install the device in locations where children are likely to be present.
• Conductors with a cross-section of 0.5 mm2 (AWG24) or greater shall comply with the requirements of IEC 60332-1-2 and IEC 60332-1-3 or IEC TS 60695-11-21.

Technical data

Power supply

Operating voltage AC 24 V (24 V=, J_, kt)| AC 24 V -15 / +20 % (PELV) AC 24 V Class 2 (US) 48…63 Hz
---|---
Operating voltage DC 24 V (24 V=, 1, 4)| DC 24 V -15 / +20 % (PELV) DC 24 V Class 2 (US)
Functional ground (US) Functional earth Fist| The terminal for the functional ground must be connected on the installation side with the building grounding system (PE).
Screw terminals for wire cross sections up to| Max. 2.5 mm2 (14 AWG)
Internal fusing| 4 A irreversible / non-replaceable
External supply line fusing (EU)| Non-renewable fuse max. 10 A slow-blow or circuit breaker max. 13 A
Tripping characteristic B, C, D per EN 60898 or Power supply with current limitation of max. 10 A

Power consumption (for transformer / power supply planning)

| Operating voltage
AC 24 V| Operating voltage
DC 24 V
---|---|---
Full load| 71 VA / 3.0 A| 66 W / 2.8 A
Base load (without loading by I/O modules TXM, KNX
PL-Link, M-Bus, and field devices)| 15.4 VA / 0.64 A| 7.8 W / 0.33 A
I/O modules TXM supply| 15 VA / 0.6 A| 8 W / 0.3 A
KNX PL-Link supply| 4 VA / 0.17 A| 2.2 W / 0.09 A
M-Bus supply, for future use| 3 VA / 0.13 A| 1.7 W / 0.07 A
Field device supply V~| Max. 2 A, total of the connected field devices < 48 VA / 48 W

Function data

Hardware information

Processor| NXP i.MX8 QuadXPlus, 1.2 GHz
Storage| 2 GB RAM
8 GB eMMC

Interfaces

Ethernet interface

Plug| 3 x RJ45, shielded
Interface type| 10Base-T / 100Base-TX, IEEE 802.3 compatible
Bit rate| 10/100 Mbps, autosensing
Protocol| BACnet/IP on UDP/IP, BACnet/SC on TCP/IP, and HTTPS on TCP/IP
Cabling (in-house cabling only), cable type| 10 Mbps: Min. CAT3, shielded cable is recommended 100 Mbps: Min. CAT5, shielded cable is recommended
Cable length| Max. 100 m (330 ft)

The COM interfaces can be used either for Modbus or for MS/TP, according to type and configuration.

Modbus RTU interface

Interface type| EIA-485, electrically isolated
Baud rate| 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200 (depending on the configuration)
Internal bus termination| 120 Ohm, switchable with DIP switch
Internal bus polarization| 270 Ohm pull-up/pull-down resistances, switchable with DIP switch
Cabling (in-house cabling only) Cable length| 3-wire cable, shielded cable recommended (shield must be connected to building earth in the mounting panel) Max. 1000 m (3300 ft)
Protection| Short-circuit proof Protection against faulty wiring with AC 24 V and DC 24 V
BACnet MS/TP interface

Interface type| EIA-485, electrically isolated
Baud rate| 9600, 19200, 38400, 76800, 115200 (depending on the configuration)
Internal bus termination| 120 Ohm, switchable with DIP switch
Internal bus polarization| 270 Ohm pull-up/pull-down resistances, switchable with DIP switch
Cabling (in-house cabling only) Distance between 2 devices Length of the MS/TP line| 3-wire cable, shielded Max. 500 m (1650 ft)
Max. 1000 m (3300 ft)
Protection| Short-circuit proof Protection against faulty wiring with AC 24 V and DC 24 V
WLAN interface

Interface type| Wireless access point
Supported standards Frequency band WLAN channels
Maximum radio-frequency power| IEEE 802.11b/g/n 2.412…2.462 GHz
1…11
16.4 dBm
Distance (unobstructed field)| Min. 5 m (16 ft)
Device pairing| Activation / Deactivation with service button Automatic switch off after 10 minutes if no WLAN-client is connected.
Optionally, for cyber security reasons, the WLAN can be permanently disabled via configuration.
Default SSID and WLAN password : Scan the QR code.

It will show something like WIFI:S: PXC7.E400_0000550 ;T:WPA;P: 1400052738 ;; Then SSID = PXC7.E4000000550 and password = 1400052738
Determine manually: Use the information from the Date/Series/SN block It will show something like: Date/Series: 20210423 0000550
S/N: 1400052738
SSID = and password = <S/N>

KNX PL-Link interface

Type| KNX TP1 PL-Link, galvanic isolation Baud rate: 9.6 kbps
Cabling (in-house cabling only)

Cable length

| 2-wire cable, 0.75 mm2 / AWG20 or 1 mm2 / AWG18
With internal supply: Max. 80 m (262 ft) With external supply: Max. 1000 m (3300 ft)
Internal bus power| Max. 50 mA
When using external bus power for KNX PL-Link, switch off the internal bus power via the ABT Site Tool.
I/O modules TXM interface

Nominal voltage| DC 24 V
TXM I/O module power| Max. 300 mA
Switchable in parallel with DC 24 V power supply module TXS1.12F4| For details, see: TX-I/O- engineering and installation, CM110562
Protection| Short-circuit proof
TXM I/O module plug: No protection against faulty wiring on AC 24 V| No electric protection. Use cover
Field device power (I/O module TXM)

AC 24 V (terminal V~ on the TXM module)| Max. 2 A, short-circuit proof (Only if PXC7 is powered with AC).
Screw terminals, plug-in

Cu-wire or Cu-strand with wire end sleeve| 1 x 0.6 mm ∅ to 2.5 mm2 (22 to 14 AWG)
or 2 x 0.6 mm ∅ to 1.0 mm2 (22 to 18 AWG)
Cu-strand without wire end sleeve| 1 x 0.6 mm ∅ to 2.5 mm2 (22 to 14 AWG)
or 2 x 0.6 mm ∅ to 1.5 mm2 (22 to 16 AWG)
Stripping length| 6…7.5 mm (0.24. 0.29 in)
Screwdriver| Slot screws, screwdriver size 1 with shaft ø = 3 mm
Max. tightening torque| 0.6 Nm (0.44 lb ft)

Conformity

Ambient conditions and protection classification

Classification as per EN 60730 Automatic action
Control function Degree of pollution
Overvoltage category| ****

Type 1 Class A 2 I

Protection against electric shock| Protection class III
Degree of protection of housing to EN 60529 Front parts in DIN cut-out Terminal part| IP30 IP20
Climatic ambient conditions
● Storage / Transport (packaged for transport) as per IEC EN 60721‑3‑2
● Operation as per IEC/EN 60721-3-3| ****

● Class 1K22 / 2K12
Temperature -25…70 °C (-13…158 °F)
Air humidity 5…95 % (non-condensing)
● Class 3K23
Operation in enclosed dry locations, having no temperature or humidity control
Temperature -5…50 °C (23…122 °F) (for details see chapter Mounting)
Air humidity 5…95 % (non-condensing)

Mechanical ambient conditions
● Transport per IEC/EN 60721-3-2
● Operation as per IEC/EN 60721-3-3| ****

● Class 2M4
● Class 3M11

1. Documents can be downloaded at http://siemens.com/bt/download.

FCC Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. this device must accept any interference received, including interference that may cause undesired operation
FCC Caution: Changes or modifications not expressly approved by Siemens Switzerland Ltd. could void user authority to operate the equipment. United States representative https://new.siemens.com/us/en/products/buildingtechnologies/home.html

Radiofrequency radiation exposure statement
This equipment complies with FCC and IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and your body.
This transmitter must not be co-located or operated in conjunction with any other antenna or transmitter.

Housing

Disposal

**** The device is considered an electronic device for disposal in accordance with European Directive and may not be disposed of as domestic waste.

• Use only designated channels for disposing the devices.
• Comply with all local and currently applicable laws and regulations.
• Dispose of empty batteries at designated collection points.

Warranty

Technical data on specific applications are valid only together with Siemens products listed under “Equipment combinations”. Siemens rejects any and all warranties in the event that third-party products are used.

Connection terminals

the building grounding system (PE).
10, 11| D, ⏊| Digital input (for future use)
Term| On, off| Switch for bus termination
Polar| On, off| Switch for polarization
66, 67| MBUS| M-bus interface (for future use)
68, 69, 70| COM1| Interface EIA-485 (Modbus and MS/TP)
Remark: Activation of COM 1/2/3/4 depending on Type (S,M,L)
71, 72, 73| COM2
74, 75, 79| COM3
77, 78, 79| COM4
Right side of device|  | Interface for connecting TXM input/output modules

Dimensions

All dimensions in mm and inches.
PXC7

PXC7 with four TXM modules

Issued by
Siemens Switzerland Ltd
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH-6300 Zug
+41 58 724 2424
www.siemens.com/buildingtechnologies
© Siemens Switzerland Ltd, 2022
Technical specifications and availability subject to change without notice.
Document ID A6V12505052_en–_c
Edition 2022-08-30

References

• CSA Group Product Listing - CSA Group
• Smart Information Delivery
• Product Sourcing and Certifications Database | UL Solutions
• Smart Information Delivery
• Building technology - Products & Services - Siemens Global Website
• Building Technologies - Building Technologies - Siemens USA

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