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

Gain superior protection for personnel and keep your machine guard door secure with the TLS-1-GD2 440G-T Solenoid Interlock Safety Switch, Power to Unlock, 24V ac/dc, by Allen Bradley Guardmaster.

This device is a positive mode, tongue operated interlock switch that ensures guards are safely locked while machinery is in motion, and keeps power isolated when the guard is open. This reduces the risk of personnel entering a hazardous area. This cost-effective switch is perfect for use with machines which do not stop instantly, or which may be damaged by interference while in motion. The secure interlock mechanism is released only when an external signal is applied to the internal solenoid, which then allows the safety barrier to be opened.

The 440G-T27121 has power to unlock functionality and an operating temperature of -20 to +60 °C (-4…+140 °F). It has a supply voltage of 24VAC/DC, M20 conduit entry, thermal current of 10A, and rated insulation voltage of 500V. It features 2NC Safety Contacts, 1NO Auxiliary Contact, and 1NC/1NO Solenoid Contacts. The housing material is comprised of UL approved glass-filled PBT and this guard locking switch is fitted with a stainless-steel actuator guide to protect the unit from actuator damage due to wear-and-tear and poor gate alignment. It is suitable for use with PLCs.

Allen Bradley Guardmaster have an extensive range of machine monitoring and locking components that are built to global standards for quality and reliability. Their affordable solutions are expertly designed to meet every requirement and improve protection, efficiency, and productivity in the workplace.

Actuator is not supplied and must be ordered separately. This safety switch incorporates a power-to-unlock function.

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.

• High locking force 2000 N (450 lb) for superior protection
• Convenient rotatable head with 2 entry slots, 4 possible actuator entry positions, blanking plug provided to seal the unused slot
• Five contacts are 2NC and 1NO for door position monitoring, 1NC and 1NO for lock monitoring
• Lid mount status indication for rapid troubleshooting
• High environmental protection rating of IP67, ensuring that it is dust-tight and can withstand some immersion in water
• It has three manual release points with security screws, for use in the event of an emergency
• Ideal for use with hinge, sliding, and lift-off doors

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
IP69K rated

A solenoid interlock switch is a type of safety switch with an internal solenoid; a wire coil which converts electrical energy to mechanical. This type of interlock mechanism prevents access to dangerous areas where machinery may be functioning by ensuring that that barriers remain securely locked. The safety guard can only be released through either energising (Power to unlock) or de-energising (Power to Lock) the solenoid with an external signal. They are often used in industrial environments, for example with high inertia rotating machines.