Hongdian H3304 4CH Dual SD MDVR - Manual (Page 17)

2 -7
Rear Panel
Interface Name Instruction
I/O & RS485 &
RS232 &5V/12V
interface I/O & RS485 &
RS232 5V/12V 6*GPIO input&2GPIO output
2*RS485&2RS232
Collect electrical level, used for
turn light, braking, alarm,etc.
Power for cameras Audio/video input AV IN1～4/8 AV IN1～AV IN4/8, aviation
interface to BNC.
White:AUDIO IN
Yellow:VIDEO IN
Audio/video
output AV OUT AV output port to connect
monitor.
Voice communication INTERCOM Connect voice input/output device.
3G/4G antenna 3G/4G Cellular SMA-J female port
GPS antenna GPS GPS SMA-J female port
Wi-Fi antenna WIFI Wi-Fi SMA-J female port
DC IN DC IN Power supply for H3308/H3304