The device features an internal release mechanism that allows 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 DM-I unit is fitted to the doorpost and allows operators to enter through one access point and exit through another in multi-access applications. The DM-I features a large red button and depressing the button releases the door, even though the DM unit is still locked. 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 DM-I latches back in place and the machine is able to restart.
The DM-I unit can be mounted on a variety of panel thicknesses. Locks are available as standard DM units which can go up to 10 modules, or fully stainless steel, DMS, which can hold up to 5 modules; both feature +/-5° fine adjustment.
The DM-I is part of the mGard range of robust mechanical trapped key products, a completely modular system where individual modules can simply be added or removed. Suitable for use in applications up to SIL3 (EN/IEN 62061), category 4 and PLe (EN/ISO 13849-1), mGard is ideal for use in harsh environments.
For more information on the DM-I and other Fortress products, please visit the company website at www.fortressinterlocks.com