Siemens SIRIUS 3SK1 Equipment Manual

3.5.2 3SK1 Advanced system con󹪝guration
Components and wiring
A 3SK1 Advanced system can comprise the following devices:
• Basic units (one basic unit per system)
– 3SK1121 Advanced basic unit instantaneous (with relay outputs) (Page 70)
– 3SK1121 Advanced basic unit time-delayed (with relay outputs) (Page 73)
– 3SK1122 Advanced basic unit instantaneous (with semiconductor outputs) (Page 76)
– 3SK1122 Advanced basic unit time-delayed (with semiconductor outputs) (Page 80)
– 3SK1120 Advanced basic unit instantaneous (with semiconductor outputs) (Page 84)
• Input expansions
– Power supply 3SK1230 (Page 107)
– Input expansion 3SK1220 (Page 104)
• Output expansions
– Output expansion 3SK1211 (Page 90)
– Output expansion 3SK1213 (Page 94)
– 3RQ1 output expansion
– Output expansion for 3RM1 Failsafe motor starter. You can 󹪝nd more information in the
SIRIUS 3RM1 motor starters (
http://support.automation.siemens.com/WW/view/en/
66295730) manual.
• (Optional)3ZY12 device connector (Page 116)
Connect the devices with 3ZY12 device connectors or by wiring them.
If you use 3ZY12 device connectors, there is no need for wiring between the basic unit and the
expansion unit(s). In this case, all necessary signals are exchanged via the device connector.
You will 󹪝nd the rules for con󹪝gurations with device connectors in the section "System
con󹪝guration rules (Page 120)".
Description
3.5 3SK1 system
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005 37

Siemens SIRIUS 3SK1 Specifications

General

Brand	Siemens
Model	SIRIUS 3SK1
Category	Relays
Language	English