Siemens SIRIUS 3SK1

Designation Voltages Article number
3RM1 Failsafe direct-on-line starters 24 V DC 3RM11..-xAA4
3RM1 Failsafe reversing starters 24 V DC 3RM13..-xAA4
x = 1: Screw-type terminal; x = 2: Spring-loaded (push-in) terminal
x = 3: (3RM1 only) mixed connection system: Control circuit realized as spring-loaded (push-in) terminal and main circuit as screw
terminal
y = 0: SIL 2 / PL c; y = 2: SIL 3 / PL e
z = E: 1NO 1NC; z = G: 2NO 1NC; z = H: 2NO 2NC; z = L: 4NO 1NC
Overview of the safety-related outputs
Type and number of safety-related outputs
Advanced
Relays Semiconductors Semiconduc‐
tor signaling
circuits
Device
connectors
Instantaneous Time-delayed Instantaneous Time-delayed
3SK1121-.AB40 3NO 1NC - - - 1 ✓
3SK1121-.CB4. 2NO 2NO - - - ✓
3SK1122-.AB40 - - 3 - 1 ✓
3SK1122-.CB4. - - 2 2 - ✓
3SK1120-.AB40 - - 1 - - ✓
Standard
3SK1111-.A..0 3NO 1NC - - - 1 -
3SK1112-.BB40 - - 2 - 1 -
Output expansions
4RO
3SK1211 4NO 1NC - - - ✓ (for 24 V DC)
3RO
3SK1213 3NO 1NC - - - - ✓ (for 24 V DC)
3RQ1 output expansion
3RQ1000-.E
3RQ1200-.E
(SIL 3 / PL e)
1NO 1NC - - - - ✓ (for 24 V DC)
3RQ1000-.G 2NO 1NC - - - - ✓ (for 24 V DC)
3RQ1000-.H 2NO 2NC - - - - ✓ (for 24 V DC)
3RQ1000-.L 4NO 1NC - - - - ✓ (for 24 V DC)
Description
3.2 Product overview
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005 33