Hongdian H3324 4CH HDD MDVR - Manual (Page 19)

2 -9
3G/4G antenna
(ANT1) 3G/4G
Cellular SMA-J female port
GPS antenna
(ANT2)
GPS GPS SMA-J female port
Wi-Fi antenna
(ANT3) WIFI
WiFi SMA-J female port
DC IN DC IN Power supply for H332x
DC OUT DC OUT Power supply for camera. etc
GPIO instruction
No. Label Instruction
1 IO_IN1 Collect electrical level, used for turn light,
braking, alarm.etc which involves electrical
change.
 High level 3V ～ 24V
 Low level 0V ～ 3V
2 IO_IN2
3 IO_IN3
4 IO_IN4
5 IO_IN5
6 IO_IN6
7 IO_OUT1 Alarm output electrical level, could connect
external device.
 High level 12V (can supply with 130mA
power )
 Low level 0V
8 IO_OUT2
9 GND Connect ground