3SK1 safety relays
Manual, 04/2013, A5E02526190021A/RS-AA/01
95
System configuration
6
6.1 General information
6.1.1 General notes on the Standard system
● Expanding enabling circuits using external wiring.
● Output expansions must be activated via a safe enabling circuit/output of the basic unit.
● The NC circuit (51/52 for 3SK1211; 41/42 for 3SK1213) of the output expansion must be
looped into the feedback circuit (T2/INF) of the basic unit.
6.1.2 General information on the Advanced system
● Expandable using 3ZY12 device connector on both input and output side.
● The output expansions are activated and the feedback circuit is evaluated via the
connection interface.
● When using the Advanced device series with output expansion on the device connector
described, all enabling and signaling circuits of the basic unit and output expansion can
be used as required.
● The input expansions, as well as the output expansions mounted on the 3ZY12 device
connector, are supplied with voltage via the 3ZY12 device connector. The supply voltage
is only connected once on the basic unit (24 V DC) or the 3SK1230 power supply (110 ...
240 V AC/DC).
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