User's Manual

TB7100 Installation Guide Connection 15
© Tait Electronics Limited May 2005
2.4 Base Station Connections
2.4.1 Rear Panel
The rear panel has the serial interface, the system interface, the DC input
and the RF in and out connectors. Each of these is described in this section.
System Interface The system interface connector provides the following:
The pin allocations for the 25-way female D-range system interface
connector are listed in the table below.
■ transformer isolated 600Ω balanced audio I/O
■ opto-isolated keying
■ opto-isolated gate output
■ digital I/O (bidirectional)
■ Tx key
■ Tx relay
■ Rx gate
■ RSSI
System Interface Pin Signal Name Signal Type Notes
1 Rx line output + audio output transformer isolated line
2 Tx/Rx digital input 1 input high ≥1.7 V, low ≤0.7 V
3 Tx/Rx digital input 2
4 Rx line output – audio output transformer isolated line
5 Tx line input + audio input transformer isolated line
6 Tx/Rx digital input 3 input high ≥1.7 V, low ≤0.7 V
7 Tx/Rx digital input 4 input output: high ≥3.1 V (no load),
low <0.6 V (10mA sink)
input: high ≥1.7 V, low ≤0.7 V
8 Tx line input – audio input transformer isolated line
9 RSSI output DC signal
10 Tx digital in/out 1 input/output output: high ≥3.1 V (no load),
low <0.6 V (10mA sink)
input: high ≥1.7 V, low ≤0.7 V
11 Tx audio input audio input
12 Tx digital in/out 2 input/output output: high ≥3.1 V (no load),
low <0.6 V (10mA sink)
input: high ≥1.7 V, low ≤0.7 V
13 ground ground
14 Rx gate output open collector
15 Tx key input active low
16 Rx relay (comm) output
17 Rx relay (NO or NC) output
18 Rx Inhibit input
19 Rx digital in/out 1 input/output output: high ≥3.1 V (no load),
low <0.6 V (10mA sink)
input: high ≥1.7 V, low ≤0.7 V
20 Tx Opto input + input input voltage range 10VDC to
60VDC21 Tx Opto input – input
22 Rx digital in/out 2 input/output output: high ≥3.1 V (no load),
low <0.6 V (10mA sink)
input: high ≥1.7 V, low ≤0.7 V
23 Digital output/Tx relay output
24 Rx audio output output
25 13.8 volt output power output resetable SMD fuse 1.5A
external view
B
C
D
E
F
G
H
I
J
1)
1!
1@
1#
1$
1%
1^
1&
1*
1(
2)
2!
2@
2#
2$
2%