915 Emergency Module with Timer
For the 900 Series Door Control System
The 915 module is installed in the primary 900 rack and provides a time delay between the activation of a fire alarm and the unlocking of the emergency doors. When a fire alarm is reported, the timer will begin to count down and the Rack Mag Release button will flash red indicating an alarm is pending. These actions will also be accompanied by an audible beep. The operator can unlock the doors immediately by pressing the Rack Mag Release button or can keep the doors locked using the Lockdown switch. If the operator needs more time, pressing the Timer Restart button resets the timer. If the operator takes no action the doors will unlock automatically when the delay expires, and the Rack Mag Release button will turn yellow.
This module must be in the first (left-most) position on the 900 secondary rack.
Guarded Toggle Switch Operation:
- Down Position – Normal Operation; in the event of a fire, the external fire control system will unlock all doors when the timer expires.
- Up Position – Emergency Lock Down; all doors are locked regardless of any other inputs; overrides fire control.
Status Indicators:
- The Rack Mag Release button will flash red if an alarm is pending, and will turn yellow when the doors have been unlocked.
- The Countdown Timer shows the remaining time in seconds until automatic unlock occurs.
Timer Setting:
- There are two rotary switches on the 915 board to set the time delay to any value between 1 and 99 seconds. SW2 sets seconds x 10 and SW3 sets seconds x 1. Example: SW2=3, SW3=0 yields a delay of 30 seconds.
