3SK1 safety relays
Manual, 04/2013, A5E02526190021A/RS-AA/01
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Product overview for 3SK1
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3.1 Overview
Overview of 3SK1 safety relays
The following tables provide an overview of the 3SK1 safety relays.
3SK1 Standard basic units
Designation Voltages MLFB
24 V AC/DC 3SK1111-xAB30 Basic unit 3SK1 Standard instantaneous (with relay outputs)
110 ... 240 V AC/DC 3SK1111-xAW20
Basic unit 3SK1 Standard instantaneous (with solid-state outputs) 24 V DC 3SK1112-xBB40
x = 1: screw terminals; x = 2: push-in terminals
3SK1 Advanced basic units
Designation Voltages MLFB
Basic unit 3SK1 Advanced instantaneous (with relay outputs) 24 V DC 3SK1121-xAB40
Basic unit 3SK1 Advanced time-delayed (with relay outputs) 24 V DC 3SK1121-xCB4y
Basic unit 3SK1 Advanced instantaneous (with solid-state outputs) 24 V DC 3SK1122-xAB40
Basic unit 3SK1 Advanced time-delayed (with solid-state outputs) 24 V DC 3SK1122-xCB4y
Basic unit 3SK1 Advanced 17.5 mm instantaneous (with solid-state
outputs)
24 V DC 3SK1120-xAB40
x = 1: screw terminals; x = 2: push-in terminals
y = 1: 0.05 ... 3 s; y = 2: 0.5 ... 30 s; y = 4: 5 ... 300 s
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