Siemens SIRIUS 3SK1 Manual page 224

Accessories
Use of removable terminals for 3SK1
The following removable terminals are available for safety relays for the prewiring of
terminals in the control cabinet or for terminal replacement:
3SK1 safety relays
3SK1 Advanced basic units
3SK1111
3SK1112
3SK1120
3SK1121
3SK1122
Output expansions
3SK1211
3SK1213
Input expansions
3SK1220
3SK1230
224
Screw terminals
2-pin
3ZY1121-1BA00 3ZY1131-1BA00
---
✓
---
---
✓ bottom
✓
---
---
✓ bottom
Spring-type terminals (push-in)
3-pin 2-pin
3ZY1121-2BA00
✓
---
✓
✓
✓ top ✓ bottom
---
---
✓ top
--- ✓ bottom
Manual, 06/2018, A5E02526190021A/RS-AD/004
3-pin
3ZY1131-2BA00
--- ✓
✓ ---
--- ✓
--- ✓
✓ top
✓ ---
--- ---
--- ✓ top
---
SIRIUS 3SK1 safety relays