3.2 Product overview
You can achieve a safety level up to SIL 3 / PL e in accordance with IEC 62061 / EN ISO 13849 with
all 3SK1 safety relays and 3RM1 motor starters.
You can use the 3RQ1 positively-driven coupling relays as an output expansion for 3SK1 units.
You can achieve a safety level up to SIL 2 / PL c or SIL 3 / PL e (3RQ1) in accordance with IEC 62061 /
EN ISO 13849 with this combination.
3SK1 basic units Standard
Designation Voltages Article number
3SK1 basic unit Standard instantaneous (with relay outputs) 24 V AC/DC 3SK1111-xAB30
110 ... 240 V AC/DC 3SK1111-xAW20
3SK1 basic unit Standard instantaneous (with semiconductor outputs) 24 V DC 3SK1112-xBB40
x = 1: Screw-type terminal; x = 2: Spring-loaded (push-in) terminal
3SK1 basic units Advanced
Designation Voltages Article number
3SK1 Advanced basic unit instantaneous (with relay outputs) 24 V DC 3SK1121-xAB40
3SK1 Advanced basic unit time-delayed (with relay outputs) 24 V DC 3SK1121-xCB4y
3SK1 Advanced basic unit instantaneous (with semiconductor outputs) 24 V DC 3SK1122-xAB40
3SK1 Advanced basic unit time-delayed (with semiconductor outputs) 24 V DC 3SK1122-xCB4y
3SK1 Advanced basic unit 17.5 mm instantaneous (with semiconductor
output)
24 V DC 3SK1120-xAB40
x = 1: Screw-type terminal; x = 2: Spring-loaded (push-in) terminal
y = 1: 0.05 ... 3 s; y = 2: 0.5 ... 30 s; y = 4: 5 ... 300 s
Expansion units
Designation Voltages Article number
3SK1211 output expansion 24 V AC 3SK1211-xBB00
24 V DC 3SK1211-xBB40
110 ... 240 V AC/DC 3SK1211-xBW20
3SK1213 output expansion 24 V DC 3SK1213-xAB40
115 V AC 3SK1213-xAJ20
240 V AC 3SK1213-xAL20
3RQ1 output expansion 24 V DC 3RQ1y00-xzB00
24 ... 240 V AC/DC 3RQ1y00-xzW00
3SK1220 input expansion 24 V DC 3SK1220-xAB40
3SK1230 power supply 110 ... 240 V AC/DC 3SK1230-xAW20
Description
3.2 Product overview
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
32 Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005
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