T2004 Multi-Control Head
System Manual
Part C X2AM01 Radio Interface
61
© Tait Electronics Ltd May 2004
2
Circuit Description
This section provides circuit information for the X2AM01 Multi-Head
Radio Interface PCB.
Audio
The PCB provides a balanced 600 Ohm line interface for both the Tx and
Rx audio.
Power
The PCB is supplied with 13.8V from the radio. A single 5V supply is
provided for circuitry on the X2AM01 Interface PCB only.
The remote power switch line SK3-3 (controlled by the Primary head)
enables the 5V regulator, which in turn draws current from the radio (SK1-
1) and causes the radio to power up.
Data
A separate RS485 transmitter and receiver provide the data communications
between the radio and control heads.
Connections
The connection to the radio is the same as for a standard T2000 control head
(micromatch cable to SK1). Connection to the remote control heads is via
the micromatch loom at SK3, which connects to the RJ45 Wallbox. The
wallbox connects to the multi-drop cable, which connects to the RJ45
Wallbox for each control head.