User manual
77H.264 Network DVR User Manual
APPENDIX A: D-SUB CONNECTOR PIN CONFIGURATION
A.3 DMR40DVD 15-pin D-sub connector conguration
Siren: When the DVR is triggered
by alarm or motion, the COM
connects with NO and the siren
with strobe starts wailing and
ashing.
Magnetic Contact: When the
magnetic contact is opened, the
alarm will be triggered and the
recording is on.
Table 12. 25-pin D-sub conguration for DMR40DVD
Pin Function Description
1~2 PIN OFF NA
3~6 ALARM INPUT Connect ALARM INPUT (pin 3 – 6) and GND (pin 9) connector with wires. When an alarm is trig-
gered, the DVR will start recording and the buzzer will be on.
Pin 3 is Alarm 1. When the alarm is triggered, DVR CH1 will start alarm-triggered recording.
Pin 4 is Alarm 2. When the alarm is triggered, DVR CH2 will start alarm-triggered recording.
Pin 5 is Alarm 3. When the alarm is triggered, DVR CH3 will start alarm-triggered recording.
Pin 6 is Alarm 4. When the alarm is triggered, DVR CH4 will start alarm-triggered recording.
7 NC During normal operation, COM connects with NC and disconnects from NO. But when any alarm
is triggered, COM disconnects with NC and connects with NO. Attention: Voltage and current
must be < 24 V DC @1A.
8 NO During normal operation, COM disconnects with NO. But when any alarm is triggered, COM con-
nects with NO. Attention: Voltage and current must be < 24 V DC @ 1A.
9 GND GROUND
10 RS485-B Using RS485 serial communication signals, DVR can be controlled by the keyboard controller.
11 RS485-A Using RS485 serial communication signals, DVR can be controlled by the keyboard controller.
12~14 PIN OFF NA
15 EXTERNAL
ALARM COM
During normal operation, COM disconnects with NO. But when any alarm is triggered, COM con-
nects with NO. Attention: Voltage and current must be < 24 V DC @ 1A.