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RS-232 Serial Connector
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.
Figure 6 DE-9M Serial Port
RS-232 / DE-9M Serial Port Pin Configuration Table
Signal Type Pin Number Description
DCD In 1 Carrier Detection Signal (not
used)
Rx 2 RS232 Receive
Tx 3 RS232 Transmit
N/C 4 No Connection
GND 5 System Ground
N/C 6 No Connection
RTS 7 RS232 Request To Send
Signal
CTS 8 RS232 Clear To Send Signal
N/C 9 No Connection
Table 7. RS-232 Pin Configuration
Pin 1
Pin 9
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