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Chapter 2. Hardware Description
The RS-232 COM port is used to connect the DVR to a PC (optional updating procedure) or to connect an
external device like a DVR controller (optional). The required settings to use the RS-232 port can be
configured in the DVR settings.
Connection Type: 9 pole D-Type male connector
Maximum Input Voltage: +/- 25V
Pin 1
Figure 9 DE-9M Serial Port
[Please refer to the Figure 1 (4ch Model), Figure 2 (9ch Model), Figure 3 (16ch Model) item marked "⑩"
Serial Connection].
RS-232 / DE-9M Serial Port Pin Configuration Table
Signal Type
DCD In
Rx
Tx
N/C
GND
N/C
RTS
CTS
N/C
3. Rear Port Specification and Connection Examples
Pin 9
Pin Number
1
2
3
4
5
6
7
8
9
Table 10. RS-232 pin configuration
Description
Carrier Detection Signal (not used)
RS232 Receive
RS232 Transmit
No Connection
System Ground
No Connection
RS232 Request To Send Signal
RS232 Clear To Send Signal
No Connection
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