System configuration
6.1 General information
3SK1 safety relays
96 Manual, 04/2013, A5E02526190021A/RS-AA/01
6.1.3 Maximum system configuration
Changes to the system configuration
Changes to the system configuration in safety mode always result in a device error.
Restarting, by disconnecting and reconnecting the operating voltage (Power OFF/ON), is a
mandatory requirement.
Maximum system configuration when supplying with 24 V DC on the basic unit
WARNING
Only one 3SK1 basic unit is permitted per system
The safety function is not guaranteed when more than one basic unit is used.
Connection of 24 V DC to the basic unit:
up to 5 expansions are permitted to the left of the basic unit and 5 expansions are permitted
on the right.
DC 24 V
L+ L-
Maximum 5
Input expansion
3SK1
3SK1
Output expansion
3SK1
Maximum 5
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