Technical Overview

The Omron A22E-M-02 is a professional-grade emergency stop (E-Stop) pushbutton switch designed for industrial automation and safety control panels. Featuring a 40mm unilluminated red mushroom head with a push-lock, turn-reset actuation mechanism, this switch ensures rapid and secure halting of equipment during hazardous situations. It conveniently fits standard 22mm or 25mm panel cutouts and incorporates a direct-opening safety mechanism with a minimum of 3mm contact separation (EN60947-5-1 compliant) to forcefully open welded contacts. Built with an IP65 degree of protection, it is highly resistant to dust, water, and oil in harsh manufacturing environments. The switch block utilizes secure screw terminal connections and is rated for up to 10A, making it a robust and dependable choice for standard and heavy-duty safety control circuits.

Key Features

40mm red non-illuminated mushroom head with push-lock, turn-reset operation [1.3].
Direct opening mechanism safely separates welded contacts with a minimum 3mm separation.
Safety lock mechanism effectively prevents accidental or erroneous operation.
Fits both 22mm and 25mm diameter panel cutouts.
Finger protection mechanism integrated directly into the switch unit as a standard feature.
IP65 degree of protection ensures robust defense against oil, water, and dust.
Easy mounting and removal of the switch blocks using a quick-release lever.

Technical Specification Matrix

Parameter	Value
Contact Configuration	DPST-NC (2 Normally Closed)
Head Diameter	40 mm
Actuation Type	Push-lock, Turn-reset
Maximum Current Rating	10 A
Voltage Rating	110 VAC / 24 VDC
Ingress Protection (IP Rating)	IP65
Panel Cutout Diameter	22 mm / 25 mm
Termination Type	Screw Terminal
Operating Temperature	-20°C to 70°C
Mechanical Life	300,000 cycles

Industrial Applications

1. Manufacturing Conveyor Belt Emergency Shutoff

Conveyor systems spanning long distances in manufacturing facilities require distinct, highly visible emergency stops at regular operator intervals. The A22E-M-02 is ideal for panel-mounting directly along the chassis or integrating into standardized pushbutton enclosures.

Problem Solved

Safely and instantly disconnects the 24VDC or 110VAC control circuit of the conveyor drive motors upon actuation, preventing injury or product jams. The IP65 rating thoroughly protects the switch from ambient warehouse dust and occasional moisture spray.

DPST-NC10A Contact RatingIP6540mm HeadPush-Lock

2. CNC Machining Center Operator Console E-Stop

CNC turning and milling centers naturally produce harsh work environments filled with flying debris and cutting fluids, requiring durable, fluid-resistant front-panel safety hardware to immediately halt the spindle.

Problem Solved

The built-in direct opening mechanism forces the circuit to break even if high-fault currents have caused the contacts to slightly weld. Its turn-reset design prevents any premature machine restarts before the operator has physically rotated the switch to clear the emergency state.

Direct Opening MechanismIP65 Oil-ResistantTurn-ResetEN60947-5-1

3. Robotic Welding Cell Perimeter Safety Interlock

Placed on the primary control pedestal immediately outside a robotic work envelope, this switch ensures all servo power to the heavy-duty robot arms is dropped before an operator can physically unlock and enter the safety gates.

Problem Solved

Satisfies the strict necessity for redundant safety breaks by utilizing its dual normally closed (2NC) contacts. This establishes a highly secure, fail-safe dual-channel electrical architecture that directly integrates with modern industrial safety PLC controllers.

DPST-NC (2NC)Safety Lock Mechanism3mm Contact Separation22mm Panel Cutout

Omron A22E-M-02 Emergency Stop Switch

Omron A22E-M-02 Emergency Stop Switch

Technical Overview

Key Features

Technical Specification Matrix

Industrial Applications

1. Manufacturing Conveyor Belt Emergency Shutoff

2. CNC Machining Center Operator Console E-Stop

3. Robotic Welding Cell Perimeter Safety Interlock