Siemens SIRIUS 3SK1

Con󹪝guring/planning
3
3.1 Derating for 3SK1121-1AB40-1AA0
Derating at di󹪜erent ambient temperatures
Ambient tempera‐
ture
Derating
40 °C No additional restrictions to the information described in the equipment man‐
uals of the individual components.
50 °C Distance on the right side to the next device 22.5 mm.
If the basic unit is extended on the right-hand side with output expansions and/
or fail-safe 3RM1 motor starters, a 22.5 mm loop-through connector
(3ZY1212-2AB00) must be used between the basic unit and the 󹪝rst expansion
or the 󹪝rst motor starter so that there is a distance of 22.5 mm between the basic
unit and the 󹪝rst expansion. There are no further restrictions for the expansions.
60 °C Distance on the right side to the next device 22.5 mm, as well as limitation of the
current load on the basic device to max. 2 A per contact (Ith) and not more than
a total current of 6 A.
If the basic unit is extended on the right-hand side with output expansions and/
or fail-safe 3RM1 motor starters, a 22.5 mm loop-through connector
(3ZY1212-2AB00) must be used between the basic unit and the 󹪝rst expansion
or the 󹪝rst motor starter so that there is a distance of 22.5 mm between the basic
unit and the 󹪝rst expansion. There are no further restrictions for the expansions.
3.2 Derating for 3SK1121-1CB41-1AA0 and 3SK1121-1CB42-1AA0
Derating at di󹪜erent ambient temperatures
Ambient tempera‐
ture
Derating
40 °C No additional restrictions to the information described in the equipment man‐
uals of the individual components.
50 °C No additional restrictions to the information described in the equipment man‐
uals of the individual components.
60 °C Distance on the right side to the next device 22.5 mm, as well as limitation of the
current load on the basic device to max. 2 A per contact (Ith) and not more than
a total current of 6 A.
If the basic unit is extended on the right-hand side with output expansions and/
or fail-safe 3RM1 motor starters, a 22.5 mm loop-through connector
(3ZY1212-2AB00) must be used between the basic unit and the 󹪝rst expansion
or the 󹪝rst motor starter so that there is a distance of 22.5 mm between the basic
unit and the 󹪝rst expansion.
There are no further restrictions for the expansions.
SIRIUS 3SK1 Advanced Safety Relays - special versions
Con󹪝guration Manual, 03/2022 11