GE General Eastern Annunciator

This single-point annunciator provides a visual and audible warning of an alarm condition occurring at a remote location. It operates, either with the Room Pressure Monitor Model RPM-1 which supplies the necessary power to the annunciator, or with any dry contact and an external power supply.

Alarm Sequence

Under normal conditions, the green LED is "STEADY ON ." When an alarm condition occurs, the green LED turns off, the red LED "FLASHES ON" and the audible alarm "PULSES ON ." Momentarily pressing the acknowledge button silences the audible alarm but the red LED stays "FLASHING ON ," as a reminder, until the alarm fault is corrected. When the conditions are normal again, the annunciator resets itself. The green LED returns to "STEADY ON ," the red LED and audible alarm are "OFF".

Behind the front panel are two potentiometers. One potentiometer provides a variable time delay from the moment the alarm is received by the annunciator, until it responds to the time delay. This delay may be adjusted between 5 and 45 seconds. The annunciator will not change to the alarm mode if the alarm condition disappears before the end of the time delay. This eliminates nuisance alarms caused by short transients.

The other potentiometer sets the volume of the audible alarm, from zero to maximum. The volume is also a function of the power supply voltage. The external power supply to the annunciator can be between 5 and 32 Vdc, with a maximum supply current of 13 mA. The maximum volume levels that can be expected from a distance of 1 meter at various supply voltages are outlined below:

The input signal may be either a dry contact or a voltage. The input voltage may be as high as the supply voltage. The alarm mode occurs when the input signal exceeds 2.5 Volts. When the signal is a dry contact, the contact must be closed under normal conditions. The current through the contacts is 1 mA.

The annunciator is designed for flush installation in a wall. The front panel is the same size as the standard electrical wall plate (2-3/4" x 4-1/2"). It is supplied with a standard plastic (PVC) switch box, 2-13/16" deep. This box includes four integral clamps, swing arms and ears. Other boxes with a minimum depth of 1-1/4" may be substituted by the user