Major BOS 4VD/8VD
4.Connectvity
5. Pin layout
Power supply
+12V DC, max. 1,5 A
Socket TB
Connecton of voice recorder
1...4
1
GND
2
Control pin for recorder
3
AF out A
4
AF out B
Socket RS232
3-pin RS232 int programmable I/Os + external loudspeaker (LS2)
1.......8
1
TXD (output)
2
RXD (input)
3
GND
4
I/O 1
5
I/O 2
6
I/O 3
7
AF out (LS2+)
8
AF out GND (LS2-)
Socket PTT
Connecton of ext. PTT (e.g. foot switch) or headset adapter (not necessary for standard headset)
1.....6
1
PTT HS2 in
2
+BATT out (headset adapter)
3
HS on (headset adapter control pin)
4
Optocoupler in (Anode +)
5
Optocoupler in (Cathode -)
6
GND (PTT HS2)
-12-
MBOSVD_eng (24.09.21)
