Technical data
13.2 Basic units
3SK1 safety relays
218 Manual, 04/2013, A5E02526190021A/RS-AA/01
3SK1121-.CB.1 3SK1121-.CB.2 3SK1121-.CB.4
Control supply voltage
• for DC rated value
V
24
– minimum
V —
– maximum
V
—
• at 50 Hz at AC rated value
V
—
– minimum
V —
– maximum
V
—
• at 60 Hz at AC rated value
V
—
– minimum
V —
– maximum
V
—
Operating range factor control
supply voltage rated value of the
magnet coil
—
• at 50 Hz for AC
—
—
• at 60 Hz for AC
—
0.8
• for DC
1.2
Active power loss typical W
2.5
Contact reliability of the auxiliary
contacts
—
Product function parameterizable Sensor floating / sensor non-floating, monitored start / autostart, 1-
channel / 2-channel sensor connection, cross-circuit detection,
startup testing, antivalent sensors, 2-hand switches, time delay
Suitability for use device connector
3ZY12
Yes
Suitability for interaction pressing
control
No
Suitability for use
• safety cut-out switch
Yes
• monitoring of floating sensors
Yes
• monitoring of non-floating
sensors
Yes
• magnetically operated switches
monitoring
Yes
• safety-related circuits
Yes
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