User Manual

Installation and Operator Handbook Equipment Description
AMX–MA–00652 Issue 0.02 (USA)
12
Daughterboards are available to provide this connection as 4 wire plus E & M; or 2 wire loop start and 2 wire
ground start. If no connection is required the daughterboard is not needed.
Table 2-4 Interface Module External Interfaces
Designation Connector Function
LINE 1 RJ45 Radio 1 connections for:
2 wire PSTN or PABX
4 wire + E & M microwave interconnect
2 or 4 wire tone remote unit
LINE 2 RJ45 Radio 2 connections for:
2 wire PSTN or PABX
4 wire + E & M microwave interconnect
2 or 4 wire tone remote unit
SERIAL 1 DB9 Socket Radio 1 data connection (RS-232)
SERIAL 2 DB9 Socket Radio 2 data connection (RS-232)
LINK DB9 Plug RS485 serial data connection for APCO Project 25 Fixed
Station Interface (Ef) , digital console interface or multi-site
voting (future options)
NET RJ45 Ethernet connection for network management interface (future
option)
I/O DB25 Socket General purpose input and output lines (6 inputs and 6
outputs), including dedicated outputs for antenna relay control
and dedicated inputs for transmit disable
REF IN BNC External 10 MHz reference oscillator input
STBY PWR 2-pin plug Standby power for reference oscillator oven.
-48 V IN 2-pin plug DC input for E & M signaling
The general-purpose digital I/O provides six configurable inputs and outputs. Two of the output lines may be configured by
jumper selection in the Interface Card to provide to drive 12 volt antenna relays for each of the transceivers. All other
outputs, and these two when not configured as antenna drivers, provide optically-isolated contact closures which can be
used to control other equipment.
The six inputs are also optically isolated. With an input of 5v to 10v they are sensed as active (on), when open circuited,
they are sensed as inactive (off). The first two inputs are used to disable the transmitter during test.
The general purpose input and output lines, apart from the antenna relay outputs and transmit disable inputs, are unused in
the present software release. In future releases user-configurability will be available.