Siemens SIRIUS 3SK1

Connection
9.3 Device replacement
3SK1 safety relays
Manual, 04/2013, A5E02526190021A/RS-AA/01
177
9.3 Device replacement
WARNING
Hazardous Voltage
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
When replacing a device, you do not need to re-wire it. The terminal blocks can be
disconnected from the defective device and then connected to the new device.
You can provide the terminal blocks with coding pins. These are to help you avoid errors
when replacing the terminal blocks (see the chapter "Terminal coding (Page 124)" for more
details).
Replacing the module
WARNING
Hazardous Voltage
Can Cause Death, Serious Injury, or Property Damage.
Carry out function test of the plant
To ensure the safety of the system, a full functional test must be conducted and a
successful result obtained after a device has been replaced.
Note
Only replace a defective device with a device of an identical order number.
1. Disconnect the defective device at the terminals.
– Chapter for 22.5 mm devices Disconnecting (Page 168)
–
Chapter for 90 mm devices Di
sconnecting (Page 175)
2. Deinstall the defective dev
ice.
– Chapter "Removing devices from a standard mounting rail (Page 131)"
–
Chapter "Re
moving 22.5 mm/17.5 mm devices with device connectors from a
standard moun
ting rail (Page 135)"
– Chapter "Re
moving 90 mm devices with device connectors from a
standard mounting
rail (Page 141)"