User's Manual

70-3350/5445 – User’s Manual
13 CONNECTIONS
13.1 Input/Output rear connector
The following table outlines the connections from the rear Input/Output (DB25) connector:
N. Signal name Notes
1
AUX OUT
2
- Not connected
3
EXT SPEAKER
4
FLAT UN-SQ RX AUDIO
5
DE-EMPH-SQ RX AUDIO
6
RX MUTE INPUT
7
TX AF IN
8
PTT OUTPUT
9
EXTERNAL PTT
10
SELCAL VALID
11
RSSI LEVEL
12
CDS SIGNAL
13
HANG UP
14
GND Grounded
15
GND Grounded
16
EXT SPEAKER +
17
Spare 2 Additional contact for special use
18
Spare 1 Additional contact for special use
19
Output 12V 100 mA max.
20
Backlight control input
21
INPUT/OUTPUT 2
22
INPUT/OUTPUT 1
23
External alarm input
24
Emergency switch - input
25
Ignition sense input
 Faulty connections may seriously damage your radio. Before connecting any device, consult the service manual
and your Midland Radio Corporation technical office.
1
13
25
14
Rev. 0.1 on 27 December 2004 Page 31 of 32