4
6
5
7
3
8
2
1
1
2
3
4
5
6
7
AUX2
GND GND TX+TX- RX+ RX-
VIDEO
ALARMS
GND
AUX1
AUX2
TX+
TX-
GND
RX+
RX-
VIDEO
RELAYS
SW1 SW2 SW3