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PES1900NR Operations Manual
Chapter 7. Connecting External Alarms — 101
Chapter 7. Connecting External Alarms
Overview
This chapter describes how to connect external equipment that sends a visual or audible signal,
whenever an alarm condition occurs at a repeater site.
Alarm and Control Wiring
Figure 83 shows the external alarm inputs and outputs connectors for the repeater.
•
Use Connector J2 to wire alarms from the Back-Up Power Supply (BUPS) to the repeater.
•
Use Connector J1 for digital inputs to custom external alarms, or for digital outputs to
remotely-controlled devices at the repeater site. You can also use this connector for external
shutdown of the forward and reverse power amplifiers, if required.
•
Connector J23 provides two independently-controlled “dry contact” relays, each with
standard 1C contact sets. RepeaterNet software can use these relays to control devices at
the repeater site.
•
Connector J22 provides three independent relays, with contact sets in standard 1C form.
Each relay is driven by specific summary alarms that the repeater generates.
For example, one relay activates whenever the repeater generates any critical alarm.
Similarly, the second relay activates whenever the repeater generates any major alarm, and
the third activates on any minor alarm.
You can use these relay contacts to activate external alarms or other equipment, in the event
of a repeater alarm.
Figure 83 shows the location of these connectors on the repeater. The plugs are actually removable
terminal blocks. To connect to these terminals, use the following procedure.
1. Remove the appropriate terminal block.
Figure 84 shows connector (terminal block) J1 removed.
Figure 83 Input/Output Terminals
2. Insert wires into the appropriate input and output pins.