Trapped Key Interlocks with Dual Key (Die-Cast)

The final stage of the Trapped Key process is access control, which provides the user with access to either the full or partial hazardous area. Access control interlocks are utilized to ensure that a guard or door remains securely closed during normal operating conditions, and can only be operated when a coded key is inserted and turned to enable access to the machinery.

Once the key is inserted and turned, the interlocks second key can be turned and released. The second key, often known as the personnel key, should be taken inside the hazardous area to minimize the possibility of inadvertent start-up. The first key will only be released when the second key is returned. The first key cannot be removed unless the guard is closed, and the secondary key is present.

The Trapped Key process is widely used in various industrial settings to safeguard workers and prevent accidents. It is a highly effective method for ensuring that safety protocols are strictly adhered to and that access to hazardous areas is only granted to authorized personnel. Furthermore, the process can be customized to suit different requirements, making it a versatile and flexible safety solution.

Trapped Key Bolt Interlock with Dual Key (M-BD-11)

The M-BD-11 Trapped Key Interlock operates by using a locking bolt mechanism, which is extended when in the lock position. Inserting and turning the appropriate key allows the secondary key to be released, retracting the bolt and allowing access to the hazardous area. The second key (often referred to as the personnel key) should be taken inside the hazardous area to reduce the likelihood of an inadvertent start-up.

  • Material: Mirror Polished Die-Cast Metal
  • Holding Force: F1Max 5000N
  • Key sold separately

Note: It is important that when the bolt is retracted, it is held captive until the guard is closed. If you can extend the bolt whilst the guard is open, you are at risk of serious harm.

Trapped Key Spring Handle Interlock with Dual Key (M-HD-11)

The M-HD-11 Trapped Key Interlock operates by using a spring loaded handle lock mechanism, which is locked when the first key is removed. Inserting and turning the appropriate key allows the secondary key to be released, unlocking the handle and allowing access to the hazardous area. The second key (often referred to as the personnel key) should be taken inside the hazardous area to reduce the likelihood of an inadvertent start-up.

  • Material: Mirror Polished Die-Cast Metal
  • Holding Force: F1Max 4000N

Note: Keys sold separately.

Trapped Key Spring Handle Interlock with Dual Key and Chain (M-HD-11-C)

The M-HD-11-C Trapped Key Interlock operates by using a spring loaded handle lock mechanism, which is locked when the first key is removed. Inserting and turning the appropriate key allows the secondary key to be released, unlocking the handle (which is connected to a chain) and allowing access to the hazardous area. The second key (often referred to as the personnel key) should be taken inside the hazardous area to reduce the likelihood of an inadvertent start-up.

  • Material: Mirror Polished Die-Cast Metal
  • Holding Force: F1Max 4000N

Note: Keys sold separately.

Trapped Key Spring Handle Tongue Interlock with Dual Key (M-HT-D-11)

The M-HT-D Trapped Key Interlock operates by using a spring loaded handle lock mechanism, which is locked when the first key is removed. Inserting and turning the appropriate key allows the secondary key to be released, unlocking the handle and allowing access to the hazardous area. The second key (often referred to as the personnel key) should be taken inside the hazardous area to reduce the likelihood of an inadvertent start-up. The M-HT-D interlock features IDEM’s anti-tamper cam system for long term proven reliability.

  • Material: Die-Cast Metal
  • Holding Force: F1Max 3000N
  • Ingress Protection: IP67
  • Key sold separately 

Note: The head can be rotated in 4 directions for full flexibility when mounting.

Trapped Key Tongue Interlock with Dual Key (M-TD-11)

The M-TD-11 Trapped Key Interlock operates by using a tongue locking mechanism, which is locked when the first key is removed. Inserting and turning the appropriate key allows the secondary key to be released, unlocking the tongue and allowing access to the hazardous area. The second key (often referred to as the personnel key) should be taken inside the hazardous area to reduce the likelihood of an inadvertent start-up.

  • Material: Mirror Polished Die-Cast Metal
  • Holding Force: F1Max 3000N
  • Keys sold separately
  • Actuator sold separately