Installation Guide

Mains Breakdown Relay
To be able to distinguish PSU faults from power failure, a mains
breakdown relay can be used.
The mains breakdown relay is not included in the repeater. So, it has to
be mounted outside the repeater chassis. The relay intended for this
purpose must fulfil the following specifications:
Relay specification
Closing time: Max. 30 milliseconds.
Insulation coil/contact: Min. 4KV.
Mains connected relay must be in compliance with valid local regulations.
Connection
1. Connect a currentless closed relay contact to pin AI1 and AIC on the
P33 alarm connector see Figure 2-14. Alarm is initiated by short
circuiting pin AI1 and AIC in the P33 connector.
The P33 alarm port is described in the Connection Ports section on
page 2-18.
2. Connect the relay coil. It must be supplied from the same fuse as the
repeater.
3. After commissioning, select the Mains Breakdown option in the alarm
configuration dialog box in the OMT32 or OMS program. Refer to
the OMT32, User’s Manual or the Advanced Repeater OMS, User’s
Manual.
MS
DPX
ANT
TEST
DC
-30 dB
-20 dB
P33:AICP33:AI1
P33
Figure 2-14. Mains breakdown relay connection
Allgon Systems AB AR Repeaters Installation
VD204 43/EN - Installation Guide Rev. 1A 2001-06 2 - 15