Allen Bradley Guardmaster 440G Series Solenoid Interlock Switch, Power to Unlock, 24V ac/dc

The TLS-GD2 Series Safety Switches with Escape Release option are specially designed for machine guarding with full body access. They provide essential protection for personnel trapped in unsafe areas. These switches have a high locking force of 2000N (450lb) for superior guard stability and security. They also have Five contacts: 2NC 1NO for door position monitoring, 1NC 1NO for lock monitoring.

How it works: This interlock switch is installed so that the escape release push button on the rear side is easily accessible from inside the hazardous area. It allows intentional unlocking of the TLS-GD2 from inside a dangerous area, offering a means of escape for a person who may become trapped.

EN954-1, ISO13849-1, IEC/EN60204-1, NFPA79, EN1088, ISO14119, IEC/ EN60947-5-1, ANSI B11.19, AS4024.1

Note: Actuator sold separately

CE marked for all applicable directives, cULus, and TUV

Ensure vital safe-access to machinery for personnel and keep your safety guard secure with the 440G-T21BNPM-1B Escape Release Solenoid Interlock Safety Switch by Allen Bradley Guardmaster.

This positive mode, tongue-operated interlock switch ensures that machine doors and gates are safely locked while the power supply to the machine is on. It features a rotatable head with 2 entry slots, offering 4 actuator entry options. A blanking plug is provided to seal the unused slot.

With the TLS-1-GD2 safety switch the barrier can only open when the internal solenoid is energised by an external signal. In addition, the power supply is cut off when the safety barrier is opened. This helps to reduce the risk of machine operators entering an unsafe area where machinery could be in motion and cause serious injury.

The 440G-T21BNPM-1B safety switch is Power-to-Release with Escape Release. This TLS-1-GD2 unit has M20 conduit entry and 24 V ac/dc solenoid voltage. The safety contacts are 2NC, auxiliary contact is 1NO. The solenoid contacts are 1NC/1NO. It has a rated insulation voltage is 500V and the thermal current is 10A. This switch is best suited for use with machines which do not stop instantly, or which may be damaged by interference while in motion. It ensures that machine operators are highly protected and that your machine processes can run smoothly, helping to minimise downtime and improve efficiency.

• Power-to-release with escape release
• Convenient rotatable head with four possible actuator entry points
• Contacts are 2NC/1NO, and 1 NC/1NO
• IP67 rated, ensuring no ingress of dust particles and durable against temporary immersion in water
• Three manual release points with security screws for use in the event of an emergency
• Lid mounted status indication provide door status and rapid diagnostics

Actuator is not supplied and must be ordered separately.

Warning: With the “power to lock” function switches, provisions are required to ensure that a dangerous situation cannot result from open circuit faults or power cuts.

EN954-1
ISO13849-1
IEC/EN60204-1
NFPA79
EN1088
ISO14119
IEC/ EN60947-5-1
ANSI B11.19, AS4024
CE certified
UL approved
cULus approved
TUV certified
CCC certified
IP67 rated

Solenoid interlock switches work by having their internal solenoid energised (Power to Release) or de-energised (Power to Lock) by an external signal. The solenoid is a wire coil which converts electrical energy into mechanical energy. These types of safety switches are often used in industrial environments on machine guards to monitor the barrier status and limit unsafe access to hazardous equipment. They ensure that safety barriers remain securely locked while dangerous processes are running. They are useful with machinery that does not instantly stop, such as high inertia rotating machines.