Site Alarm; Remote Control Outputs - ACC RC-85 Owner's Manual

RC-85 Repeater Controller Owner's Manual

Site Alarm

The Site Alarm logic input to the controller provides an over-the-air alarm
announcement when the alarm logic input is taken high. the alarm message is
programmed with the Alarm Message Configuration command. The site alarm
may be used as an indication of intrusion, over-temperature, water on the floor, or
even as a weather radio storm alert or aviation ELT warning.
The alarm is activated by applying a high logic signal (2.4 - 15 volts) to the
Alarm Input at J3 connector pin 7. The signal can be derived from other
circuitry, such as a temperature sensor, or from a normally open switch which
applies a voltage to the alarm input when closed. Alternatively, for more
security in intrusion detection applications, a pull-up resistor on the board can
normally be grounded by a normally closed switch, and if the switch is opened or
if wires are cut, the alarm will be activated.
Activation of the site alarm causes the alarm message to be announced over the
repeater transmitter at 15 second intervals, until cleared by a Control Op. The
alarm condition is latching - meaning that once the logic input is taken high, the
alarm condition continues even if the logic input is returned low. This insures
that detectors such as limit switches for intrusion detect cause a continuing
alarm that does not cancel once the switch is closed. The alarm condition should
be removed before the alarm is re-enabled.

Remote Control Outputs

The RC-85 controller provides three open collector high voltage, high current
remote control logic output functions which may be controlled by Touch-Tone
commands. The remote control logic outputs may be used for such functions as
high/low power select, antenna select, or control of other equipment at the
repeater site.
(Interfacing to Other Equipment) 8 - 4 V3 4/87