Siemens SIRIUS 3SK1

Example of a con󹪝guration with connection of 24 V DC on the basic unit and 3RM1 Failsafe
motor starter
3SK1
L+ L-
DC 24 V
Input
expansions
Motor starter
3RM1 Failsafe
Maximum system con󹪝guration when supplying with 24 V DC with 3SK1230 power supply
When using the 3SK1230 power supply, the maximum system con󹪝guration can be calculated
as follows:
Up to 10 "system units" can be connected to a 3SK1230 power supply.
Individual devices occupy a di󹪜erent number of system units.
Note
With this con󹪝guration too, up to 5 expansions are permitted to the left of the basic unit and 5
expansions are permitted on the right.
Device System unit
3SK1220 input expansion 1
3SK1230 power supply 0
3SK112 basic units 0
3SK1211 output expansion 2
3SK1213 output expansion 2
3RQ1 output expansion 2
3RM1 Failsafe motor starters 4
Example 1)
1 x 3SK1230 power supply ; 5 x 3SK1220 input expansion; 1 x 3SK112 basic unit;
2 x 3SK1211 output expansion
System con󹪝guration
6.1 General information
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005 113