Eaton · M22 Series

M22-D-R-K01

Active
UL CSA CE

M22 Red Complete Push Button 1NC

Part number: M22 - D - K01
Eaton M22 Series Introduced circa 2000

Eaton M22 complete red push button with 1NC contact.

Common Applications

Complete stop button. One Eaton part number, ready to mount. Red + 1NC for stop circuits.

Specifications

Actuator Type
Flush
Certifications
UL, CSA, CE
Color
Red
Contact Configuration
1NC
Cutout Diameter
22.5mm
IP Rating
IP67 (front)
Series
M22

Installation Quick Reference

Panel cutout: 22.5mm. Insert from the front of the panel, secure with mounting nut from behind (tighten to 2-3 Nm).

Contact block: Snap or screw the contact block onto the rear of the button body. Ensure the contact block orientation matches the wiring diagram — NO terminals are usually marked.

Wiring: Use 0.5-2.5mm² stranded wire with ferrules. Tighten screw terminals to 0.8 Nm. Test the button function before energizing the circuit.

Dimensions

Front 22.5mm cutout panel hole diameter Side panel contact ~45mm depth

Wiring Diagram

L T 21 22 NC (closed) opens on press

Troubleshooting

Button doesn't respond when pressed

Check the contact block first — it's the most common failure point. Test continuity across the NO or NC terminals with a multimeter. If no click is felt, the return spring in the head may be broken.

Works intermittently

Contact block contacts are pitted or burned. Replace the contact block — don't try to file the contacts. Check if the rated cycle count has been exceeded.

Button feels mushy or doesn't click

The spring return mechanism in the button head is worn. Replace the head. The contact block can usually be reused if it tests OK.

Where to Buy

Price range

$43.95 — $80.3

across 2 distributors

Quick Specs

Actuator Type
Flush
Certifications
UL, CSA, CE
Color
Red
Contact Configuration
1NC
Cutout Diameter
22.5mm

What People Are Saying

+

“Complete stop button. One Eaton part number, ready to mount. Red + 1NC for stop circuits.”

Reddit r/PLC 19 upvotes View thread →