A22-01
ActiveA22 1NC Contact Block
Omron A22 1NC contact block.
Common Applications
NC contact block for Omron A22 stop buttons and safety circuits.
Specifications
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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, CE
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Contact Configuration
Normally Closed — circuit is on until you press. Standard for stop/emergency functions. Wire in series with safety circuits.
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1NC
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Mechanical Life
How many press cycles before mechanical failure. Higher is better — 10M cycles at 100 presses/day = 274 years.
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10,000,000 cycles
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Terminal Type
How you connect wires. Screw clamp is most common in industrial. Spring cage is faster but requires proper ferrules.
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Screw clamp
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Installation Quick Reference
Mounting: Snap onto the rear of any compatible button body in the same series. The latch clicks audibly when properly seated. Some models require a mounting adapter.
Wiring: Terminals are marked NO (11/12) or NC (21/22). Use 0.5-2.5mm² wire with ferrules. Tighten to 0.8 Nm. Verify with a multimeter before energizing.
Dimensions
Wiring Diagram
Troubleshooting
Intermittent switching
Silver contacts are pitted from arcing. Replace the contact block — they are consumable parts. If arcing is severe, check that the switched load doesn't exceed the contact rating (typically 6A at 120VAC).
Contact block won't snap onto button body
Verify the contact block series matches the button head series (e.g., Schneider ZB4 blocks fit ZB4 heads only, not ZB5). Check for debris or damage on the mounting tabs.
Where to Buy
Price range
$57.14 — $58.29
across 2 distributors
Quick Specs
- Certifications
- UL, CE
- Contact Configuration
- 1NC
- Mechanical Life
- 10,000,000 cycles
- Terminal Type
- Screw clamp
What People Are Saying
“NC contact block for Omron A22 stop buttons and safety circuits.”