Lay37 switch Standard specifications: 22mm installation hole diameter | Industrial control universal button | Replacement for LAY7/LA38/Y090
Applicable scenarios: machine tools, power distribution cabinets, automation equipment, mechanical equipment start and stop control

1. Core parameters

2. Classification of full series models

1. Basic flat button (self-resetting)
LAY37-11BN
Flat round head, automatic rebound when pressed
Applicable: equipment startup, jog, general control
2. Self-locking button
LAY37-11ZS
Press to lock, press again to unlock
Applicable: equipment operation maintenance, mode switching
3. Illuminated button
LAY37-11D/DZS
Comes with LED indicator light, voltage: 24V/220V optional
Color: red/green/yellow/white/blue
Applicable: status indication, lighted start and stop
4. Emergency stop button (safety type)
LAY37-11TS
Red mushroom head, push lock and twist to release
Forced disconnection of normally closed contacts, safe shutdown
Applicable: emergency stop, safety protection
5. Key button/knob
LAY37-Y
Key rotation switch to prevent misoperation
Applicable: permission control, device locking

3. Product Structure and Core Advantages

1. universal interchangeability
   22mm standard opening, completely common installation dimensions with LAY7, LA38, Y090 series, easy to replace.
2. Safe flame retardant material
   The shell is made of flame-retardant engineering plastic, which is resistant to high temperatures, aging, and durable in industrial environments.
3. Silver alloy contacts
   Excellent electrical conductivity, reduced arcing, long service life, stable contact and no sparking.
4. Anti-loosening structure
   The terminal blocks are prevented from falling off, the screws are prevented from being lost, and the installation is firm.
5. Modular design
   The head and contact base are detachable, making maintenance and assembly easy.

4.Working principle

1. Ordinary button (self-reset/self-locking)
   Normal state: the contacts remain in the initial state (NO is open, NC is closed)
   Operation: Press the button → contact switching (NO closed, NC open)
   Self-reset: Automatically rebound when letting go, contact recovery
   Self-locking: Press to lock, the contacts remain in the switching state
2. Emergency stop button (core safety principle)
   Mechanical structure: Press the mushroom head → lock without rebound; rotate clockwise → unlock and rebound
   Electrical logic: Normally closed (NC) contacts used by default
   ✅Normal operation: NC closed, circuit conductive
   ❌ Press the emergency stop: NC is disconnected and the control loop is cut off → the equipment stops immediately
   ✅ Rotation reset: NC re-closes and the circuit is restored

5.Standard wiring instructions

1. Terminal identification: NO (normally open), NC (normally closed), COM (common terminal)
2. Conventional start and stop: COM + NO for start circuit; COM + NC for stop/emergency stop circuit
3. Model with light: separate lamp pin is connected to the corresponding power supply (DC24V/AC220V), distinguish the positive and negative poles

6.Installation dimensions

1. Panel opening: φ22mm
   Fixing method: nut locking, suitable for 1-6mm panel thickness
   Wiring method: screw crimping, the wiring is firm and reliable

7.Application fields

✅ CNC machine tools, automated production lines
✅ Distribution box, control cabinet, operating console
✅ Start and stop control of fans, water pumps and motors
✅ Lifting equipment, construction machinery, security equipment

8.Precautions for use

1.Confirm that the voltage and current match the equipment parameters before installation.
2.The emergency stop button must be connected to a normally closed contact to ensure safety
3.Illuminated buttons need to match the indicator light voltage to avoid burning out
4.It is recommended to install a waterproof cover in outdoor/humid environments
5.It is prohibited to use over rated load to extend the service life.