Safety Technology International, Inc. – STI LT-1 Latching/Timer Module, electrical digital timer. This 12-24 VAC/VDC digital timer is a reliable and highly accurate simple solution to complex timing applications. A momentary contact closure begins the timing cycle (15, 30, 45 seconds, or indefinitely) and latches a set of Form “C” dry contacts. The compact design makes it versatile for many applications. For example: when used on an egress door the supervised contacts can be set to either “’Fail Safe” or “Fail Secure” mode. A built-in reset feature allows the circuit to reset after a single operation such as a single door open and close (single passage) without waiting for the timer to expire. This prevents re-entry of any unauthorized personnel. Compact size 1.3″ high x 1.75″ wide x .65″ deep will fit inside Stopper Stations or in a handi box behind a flush mounted button. Supplied with double sided pad for installation. All instructions are conveniently marked on the board for easy installation or field adjustment. Made in U.S.A. Safety Technology International, Inc. “We protect the things that protect you”