Device Replacement - Siemens SIRIUS 3SK1 Equipment Manual

8.4

Device replacement

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 terminals can be disconnected from
the defective device and then connected to the new device.
You can provide the terminals with coding pins. These are to help you avoid errors when
replacing the terminals (see the chapter "Terminal coding (Page 124)" for more details).
Replacing the module
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 article number.
1. Disconnect the defective device at the terminals.
– Chapter for 22.5 mm / 17.5 mm devices "Disconnecting (Page 164)"
– Chapter for 90 mm devices "Disconnecting (Page 171)"
2. Deinstall the defective device.
– Chapter "Removing devices from a standard mounting rail (Page 131)"
– Chapter "Removing 22.5 mm/17.5 mm devices with device connectors from a standard
– Chapter "Removing 90 mm devices with device connectors from a standard mounting rail
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005
WARNING
WARNING
mounting rail (Page 135)"
(Page 141)"
Connection
8.4 Device replacement
173