jotron TR-7750C - Transmitter, Main; Backup Configuration

Jotron AS| TR7750C: Operators Manual  Installation
Page 4-20
P/N: 84748 (G)
Step
Description
Reference
Other useful signals in Remote configuration:
AUX1
Alarm out, Select in, RS232, +12V
3.2.5 (transmitter AUX1) and
3.4.4 (receiver AUX1)
TA-
AUX2
Key out relay, Monitor output, TX_LOW (Gas alarm) input, TXKEY
3.2.6 (transmitter AUX2)
RA-
AUX2
Squelch out relay, AGC HILO output, AGC voltage output
3.4.6 (receiver AUX2)
TA –
REM
RS485, Line input, Key, Squelch, Alarm
3.2.7 (transmitter REM)
Table 4.7-3, Transceiver, Remote (4W) interface
4.7.3 Transmitter, main / backup configuration
By connecting the alarm output from one (main) transmitter to the select input on a backup unit, it is
possible to perform automatic switching between them. In this way, if a main transmitter detects an
internal failure, it can be set up to enter into standby mode and stop transmissions. The alarm signal
will also signal to a backup unit to take over the transmit function.