STAHL 9270 Series Switching Repeater Instruction Manual
- June 3, 2024
- STAHL
Table of Contents
STAHL 9270 Series Switching Repeater Instruction Manual
Safety notes
Installation notes
-
The device is an associated apparatus (category 1) which belongs to the “Intrinsic Safety” ignition protection class and can be installed in Ex zone 2 as a category 3 device.
It meets the requirements of EN 60079- 0:2012+A11:2013, EN 60079-11:2012, EN 60079-15:2010 or IEC 60079-0 ed. 6.0, IEC 60079-11 ed. 6.0, and IEC 60079-15 ed. 4.0. -
Installation, operation, and maintenance may only be carried out by qualified electricians. Follow the installation instructions as described.
When installing and operating the device, the applicable regulations and safety directives (including national safety directives), as well as general technical regulations, must be observed.
For the safety data, refer to this document and the certificates (EU examination certificate and other approvals if appropriate). -
The device must not be opened or modified.
Do not repair the device yourself, replace it with an equivalent device.
Repairs may only be carried out by the manufacturer.
The manufacturer is not liable for damage resulting from violation. -
The IP20 degree of protection (IEC/EN 60529) of the device is intended for use in a clean and dry environment (degree of pollution 2, IEC/EN 60664-1).
Do not subject the device to mechanical and/or thermal loads that exceed the specified limits. -
The device complies with the EMC regulations for industrial areas (EMC class A).
When using the device in residential areas, it may cause radio interference.
Intrinsic safety
-
The device is approved for intrinsically safe (Ex i) circuits up to zone 0 (gas) and zone 20 (dust) in the Ex area.
The safety technology values for intrinsically safe equipment and the connecting lines must be observed for the hook-up process (IEC/EC 60079-14) and the values specified in this installation note and/or the EU examination certificate must be observed. -
When carrying out measurements on the intrinsically safe side, observe the relevant regulations regarding the connection of intrinsically safe equipment. Use only these approved measuring devices in intrinsically safe circuits.
-
If the device was used in circuits which are not intrinsically safe, it is forbidden to use it again in intrinsically safe circuits. Label the device clearly as being not intrinsically safe.
Installation in the Ex area (zone 2)
- Observe the specified conditions for use in potentially explosive areas! Install the device in a suitable, approved housing that meets the requirements of IEC/EN 60079-15 and has at least IP54 protection. Also observe the requirements of IEC/EN 60079-14.
- In zone 2 only connect or disconnect cables and adjust the DIP switch when the power is disconnected.
- In potentially explosive areas, only snap the device onto or off the Pac-Bus 9294 or connect and disconnect the cables when the power is disconnected.
- The device must be stopped and immediately removed from the Ex area if it is damaged, was subject to an impermissible load, stored incorrectly or if it malfunctions.
Potentially dust-explosive areas
- The device is not suitable for installation in zone 22.
- If you nevertheless intend to use the device in zone 22, you must install it in a housing according to IEC/ EN 60079-31. Observe the maximum surface temperatures in this case. Adhere to the requirements of IEC/ EN 60079-14.
- Connection to the intrinsically safe circuit in areas with a danger of dust explosions (zone 20, 21 or 22) is only permitted if the equipment connected to this circuit is approved for this zone (e.g., category 1D, 2D or 3D).
Safety-related applications (SIL)
NOTE: When using the device in safety-related applications, observe the instructions in the safety manual available at r-stahl.com, as the requirements may differ for safety-related functions.
Short description
The switching repeater has been designed for intrinsically safe operation of
proximity sensors (as per IEC/ EN 60947-5-6 NAMUR) and switch contacts with
open circuit or resistance circuits, as well as switches, installed in
hazardous zones.
The output circuits have one passive transistor for every channel for the
transmission of the switching signal to the control level.
Operating and indicating elements (1)
- Yellow “OUT2” LED, status of transistor 2
- Yellow “OUT1” LED, status of transistor 1
- Red “LF2” LED, line fault on sensor line 2
- Red “LF1” LED, line fault on sensor line 1
- Green “PWR” LED, power supply
- Connection terminal blocks for the safe area (black/green)
- Switch DIP 1 … DIP 4
- Connection terminal blocks for the Ex area (intrinsically safe Ex i, blue)
Installation
NOTE: Electrostatic discharge
Take protective measures against electrostatic discharge before opening the
front cover!
Connection notes
WARNING
-
Provide for a switch/circuit-breaker in the vicinity of a device that is marked as disconnect device for this device.
-
Provide overcurrent protection (I ≤ 16 A) within the installation.
-
To protect the device against mechanical or electrical damage, install it in suitable housing with an appropriate degree of protection according to IEC/EN 60529.
-
During maintenance work, disconnect the device from all effective power sources.
-
Before configuring settings using DIP switch, make sure the device has been de-energized.
-
If the device is not used as described in the documentation, the intended protection can be negatively affected.
-
Thanks to its housing, the device has basic insulation to the neighboring devices, for 300 Jeff.
If several devices are installed next to each other, this has to be taken into account, and additional insulation has to be installed if necessary! If the neighboring device is equipped with basic insulation, no additional insulation is necessary. -
The voltages present at the input, output and supply are extra-low voltages (ELV).
Depending on the application, dangerous voltage (>30 V) against ground could occur. For this event, safe electrical isolation from the other connections has been implemented.
The device can be snapped onto all 35 mm DIN rails according to IEC/EN 60715.
When using the 9294/31-12, first insert it to bridge the power supply. (3)
NOTE: Please also observe the direction of the module and Pac-Bus 9294 when snapping into position: snap -on foot at the top and connector on the left.
Power supply
The supply voltage can be supplied via terminal points 5 and 6 or via the Pac- Bus 9294.
Supply via terminal set 9194/50-01
You can connect the supply voltage directly with the bus connector by way of
the terminal set.
Adhere to the maximum feed-in of 4 A.
Feed-in via supply module type 9193
Supply module type 9193 is used to feed in the supply voltage to the DIN rail
bus connector.
Configuration
By default upon delivery, all DIP switches are in the “I” position.
Position “I” = OFF, position “II” = ON
Effective direction (switch DIP 1 = channel 1, DIP 3 = channel 2)
I = Normal phase (operating current behavior)
II = Inverse phase (closed circuit current behavior)
Line fault detection (switch DIP 2 = channel 1, DIP 4 = channel 2)
I = Line fault detection disabled – (not permitted for safety-related
applications)
II = Line fault detection enabled
In the event of a line fault, the transistor is disabled and the red LED (LF)
flashes (NE 44).
The DIN rail bus connector is used to transmit an error message to the type
9193 supply module and to forward it as a group error message.
NOTE
For switch contacts with an open circuit, line fault detection (LF) must be
disabled or the corresponding resistance circuit must be provided directly at
the contact. **(6)
**
Truth table
Sensor in input| Input circuit| DIP switch| Output|
LED
---|---|---|---|---
| | | Channel 1| Channel 2| Transistor| |
Switch| NAMUR| State| 1| 2| 3| 4| | OUT| LF
Open| Blocking| OK| I| I| I| I| Open| |
Closed| Conductive| OK| I| I| I| I| Closed| X|
Open| Blocking| OK| II| I| II| I| Closed| X|
Closed| Conductive| OK| II| I| II| I| Open| |
| Blocking| OK| I| II| I| II| Open| |
| Conductive| OK| I| II| I| II| Closed| X|
| Any| Open circuit| I| II| I| II| Open| | X
| Any| Short-circuit| I| II| I| II| Open| | X
| Blocking| OK| II| II| II| II| Closed| X|
| Conductive| OK| II| II| II| II| Open| |
| Any| Open circuit| II| II| II| II| Open| | X
| Any| Short-circuit| II| II| II| II| Open| | X
Technical data
Connection method
| Screw connection
Hardware version
Input data| CAT II (250 V against 6)
Input signal
NAMUR proximity sensors (IEC/EN 60947-5-6)
Floating switch contacts
Switch contacts with resistance circuit| Intrinsically safe
Switching points| Blocking conductive
Switching points|
Short-circuit current|
Switching hysteresis|
Non-load voltage|
Line fault detection Break 0.05 mA < IIN < 0.35 mA Short circuit 100 Ω <
Sensor < 360 Ω|
Output data| 1 transistor output, passive (per channel)
Minimum switching voltage|
Maximum switching voltage|
Drop (ΔU)|
Min. switching current| short-circuit resistant
Max. switching current| short-circuit resistant
Switching frequency|
General data
Nominal voltage UN|
Voltage range| 24 V DC -20%…+25%
Nominal current| 24 V DC
Power dissipation|
Ambient temperature
Storage temperature| (Any mounting position)
Relative humidity| non-condensing
Fire resistance (UL 94)|
Electrical isolation
Input/output Peak value in accordance with IEC/EN 60079-11|
Input/supply, DIN rail connector Peak value in accordance with IEC/EN
60079-11|
Input/output/supply, DIN rail connector Rated insulation voltage (overvoltage
category II; pollution degree 2, safe isolation in accordance with IEC/EN
61010-1) 50 Hz, 1 min., test voltage|
Output 1/output 2 Rated insulation voltage (overvoltage category II; degree of
pollution 2, basic insulation as per IEC/EN 61010-1) 50 Hz, 1 min., test
voltage|
Safety data as per ATEX
Max. output voltage Ugo|
Max. output current Io|
Max. output power Po|
Explosion group| Max. external inductivity Lo/Max. external capacitance Co
Max. internal inductance Li| Negligible
Max. internal capacitance Ci|
Safety-related maximum voltage Um|
Conformance/Approvals| CE-compliant, additionally IEC/EN 61326
ATEX| IBExU17ATEX1157X
IECEx| IECEx IBE 17.0046X
NEC| See final page
SIL in accordance with IEC 61508| To
Noise immunity|
|
*Types 9270/11-1-1****
|
*Types 9270/21-1-1****
---|---
HAZARDOUS AREA:
SAFE AREA:
| Class I, II, III, Division 1, Groups A-G & Class I, Zone 0, 1, 2, Groups
IIC, IIB, IIA
Class I, Division 2, Groups A-D & Class I, Zone 2, Groups IIC, IIB, IIA & Non-
hazardous
---|---
Type 9270/a1-1d-1f* with| a = 1 or 2 (number of channels)
d = 4, 6, 7 or 9 (number for output design)
f = 4 or 5 (number for special function)
- = s or k (design of terminals)| Non- I.S. signal circuits:
Power supply circuits:
| Terminal No.: 1, 2, 3, 4
Terminal No.: 5, 6 or pac-Bus
UN = 24 V (19.2 … 30 V DC)
Entity parameters for I.S. circuits:
-
The Entity Concept allows interconnection of intrinsically safe apparatus with associated apparatus not specifically examined in combination as a system. Selected Intrinsically Safe Equipment must be third party listed as intrinsically safe for the application and have intrinsically safe entity parameters conforming with the following:
Vmax (or Ui) > Voc or Vt (or Uo) Ci+ C Cable < Ca (or Co)
lmax or li) > lsc or It(or lo) Li+ L Cable < La (or Lo)
Pmax (or Pi) > Po -
Capacitance and inductance of the field wiring from the intrinsically safe equipment to the associated apparatus shall be calculated and must be included in the system calculations as shown under 1. Where the cable capacitance and inductance per foot are not known, the following values shall be used: Ccable = 60 pF / ft., Lcable = 0.2 µH / ft.
-
The output current of this associated apparatus is limited by a resistor such that the output voltage-current plot is a straight line drawn between open-circuit voltage and short-circuit current.
-
This associated apparatus has not been evaluated for use in combination with another associated apparatus.
-
This associated apparatus may also be connected to simple apparatus as defined in Article 504.2 and installed and temperature classified in accordance with Article 504.10(B) of the National Electrical Code (ANSI/NFPA70), or other local codes applicable.
-
Associated apparatus must be installed in an enclosure (which meets the requirements of ANSI/ISA S82) suitable for the application in accordance with the National Electrical Code (ANSI/NFPA 70) for installation in the United States, the Canadian Electrical Code for installation in Canada, or other local codes, as applicable.
-
When using as non-incendive device for Class I, Division 2 or Class I, Zone 2 do not snap equipment onto or off the pac-Bus 9294, or connect and disconnect non-intrinsically safe-lines unless power has been removed or the area is known to be non hazardous.
-
Intrinsically safe circuits must be wired separately in according with Article 504.20 of the National Electrical Code (ANSI/NFPA 70) for installation in the United States, the Canadian Electrical Code Part 1, Appendix F for installation in Canada, or other local codes, as applicable.
-
When multiple circuits extend from the same piece of associated apparatus, they must be installed in separate cables or in one cable having suitable insulation. Refer to Article 504.30(B) of the National Electrical Code (ANSI/NFPA 70) and Instrument Society of America Recommended Practice ISA RP12.6 for installing intrinsically safe equipment.
-
Electrical apparatus connected to an intrinsically safe system shall not use or generate voltages > 253 V AC resp. > 125 V DC. (Umax)
-
For 9270/*-d-** with d = 6 or 7: When using as non-incendive device for Class I, Division 2 or Class I, Zone 2 with exposure to some chemicals a periodically inspect of the relays for any degradation of properties and a replacement if degradation is found is recommended.
-
Ambient temperature: -20°C … +60°C (any mounting position)
WARNING – EXPLOSION HAZARD
Substitution of components may impair suitability for Class I, Division 2 or Class I, Zone 2.
Do not disconnect equipment unless power has been removed or the area is known to be non-hazardous.
Type and Terminal| Voc / Uo [Vdc]| Isc / Io [mA]| Po [mW]| Ci [nF]| Li [mH]|
GP A,B or IIC| GP C or IIB
---|---|---|---|---|---|---|---
Ca / Co [nF]| La / Lo [mH]| Ca / Co [nF]| La / Lo [mH]
9270/11-1*-1**
No. 10, 11| 9.6| 10| 25| 1.1| Negligible| 510
840
1200
3600| 100
5
1
0.01| 2700
4400
6300
26000| 100
5
1
0.01
Customer Support
R. STAHL Schaltgeräte GmbH
Am Bahnhof 30, 74638 Waldenburg, Germany
Tel: +49 7942 943-0
Fax: +49 7942 943-4333
Internet: r-stahl.com
E-Mail: info@r-stahl.com
References
- R. STAHL | Explosion Hazard Systems | Industrial Explosion Protection
- You will find a little bit of Stahl chemistry everywhere | Stahl | Stahl
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