When a timeout room is to be locked, an electromagnetic locking device may be used and shall have the following features:
The lock shall remain engaged only when a push button mounted outside the time-out room adjacent to the door frame is continuously depressed by hand. Upon release of pressure, the door shall unlock. The locking device shall be designed so that it cannot be engaged by leverage of an inanimate object or in any other manner except by constant human contact.
The push button, or similar device, shall be recessed from the face of the unit housing, or in some other way designed to prevent taping or wedging the button in the engaged mode.
The device shall have an interface relay with the fire alarm system and shall automatically release upon activation of the fire alarm.
The locking device shall automatically disengage in the event of a power failure.
Timers shall not be used on the locking device.