M2SSK1-101
ActiveABB M2SSK1-101 2-Position Key Switch (Ronis) — head
ABB MK series 2-position key-operated selector.
Common Applications
Key switch for ABB panel mode protection. Prevents unauthorized mode changes. Supervisor holds the key. Used on VFD panels for local/remote control and on robot cells for teach/auto mode.
Specifications
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Actuator Function
Momentary = springs back when released. Maintained/latching = stays pressed until pressed again.
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Maintained, key removable in both positions
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Certifications
Third-party safety certifications. UL = required for US NEC installations. CE = EU compliance. CSA = Canadian standards.
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UL, CSA, CE
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Contact Configuration
Normally Open — circuit is off until you press. Standard for start/go/enable functions.
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1NO
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Cutout Diameter
The hole size you drill in your panel to mount this button. 22mm is the most common industrial standard worldwide.
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22mm
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IP Rating
IP66: Dust-tight and withstands powerful water jets from any direction. Standard for outdoor and washdown applications.
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IP66
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Installation Quick Reference
Panel cutout: 22mm. Align the selector positions with the desired panel markings before tightening.
Contact blocks: Attach one contact block per position. Wire each to a separate PLC input for position feedback. A 2-position switch needs 1-2 blocks; 3-position needs 2-3.
Dimensions
Wiring Diagram
Troubleshooting
Not responding to input
Check wiring continuity with a multimeter. Verify the contact block is properly seated. Inspect terminals for loose connections.
Where to Buy
Price range
$7.27 — $17.97
across 2 distributors
Quick Specs
- Actuator Function
- Maintained, key removable in both positions
- Certifications
- UL, CSA, CE
- Contact Configuration
- 1NO
- Cutout Diameter
- 22mm
- IP Rating
- IP66
What People Are Saying
“Key switch for ABB panel mode protection. Prevents unauthorized mode changes. Supervisor holds the key. Used on VFD panels for local/remote control and on robot cells for teach/auto mode.”