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October 13, 2009

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Safety interlock- DM-I door unit

Fortress Interlocks has engineered the DM-I Door interlock, featuring an internal release mechanism that is said to allow exit from a dangerous area even when the door is locked.

The DM unit is mounted on the outside of the guard, allowing normal entry and exit using a Fortress Key. The unit allows operators to enter through one access point and exit through another, in multi-access applications. Depressing the large red button on the DM-I releases the door, even though the unit is still locked. Fortress says the action also breaks dual safety circuits wired to the safety system of the machine to ensure it stops. Once the operator has exited, the machine cannot restart until the DM-I has been reset.

The unit is part of the mGard range of mechanical trapped-key products. To find out more, visit

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