A trapped key system is a simple and affordable way to safely control access through doors and hatches. It is one of the easiest systems to implement, because it requires no programming or wiring at the door.
A trapped key system is typically used to make sure a machine or hazardous area is in a safe condition before allowing guards to be opened or personnel to enter. A trapped key system can also be used to ensure no one is in the hazardous area before the process is restarted.
Below are 3 reasons to consider using a trapped key system to control access to your machines or other hazardous areas:
- Inexpensive to implement: The only necessary wiring is a keyed switch on the front of the control panel to isolate power. There are no expensive runs of wiring to the doors or hatches required.
- Flexible: The system can be configured to fit your needs. Simple or complex safety procedures can be enforced using the many options for the number of keys and locks in the system, different power source isolation (electrical, pneumatic, hydraulic), mounting and actuator options, etc.
- Meets the highest levels of safety: The Fortress Safety mGard system is suitable for use up to SIL3 and Category 4 PLe. Moreover, the proper use of trapped key systems for machine guarding is described in Clause 10.3 of the ANSI B11 standard.
Regardless of if you need a simple coded magnet added to a guard or a complete safety system including fencing, custom guards, light curtains, safety radar, trapped key systems, etc., Bulwark is here to help.