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Appendix C: Serial Interface Specifications
Serial Interface Specifications
1. RS-232 pin assignment
The DVR may be controlled by a computer or a terminal via the standard
D-SUB 9-pin RS-232 connector.
153
9
2
8
4
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The pin assignment of the D-SUB 9-pin connector
PIN # NAME PIN # NAME
1 NOT CONNECTED 1 NOT CONNECTED
2 TXD 2 RXD
3 RXD 3 TXD
4 NOT CONNECTED 4 NOT CONNECTED
5 GROUND 5 GROUND
6 NOT CONNECTED 6 NOT CONNECTED
7 NOT CONNECTED 7 NOT CONNECTED
8 NOT CONNECTED 8 NOT CONNECTED
9 NOT CONNECTED 9 NOT CONNECTED
DVR
HOST
2. Transmission setting
There are 6 different speeds that can be used to transmit instruction or information through
the RS232/RS485 port on the device, 1200 baud, 2400 baud, 4800 baud, 9600 baud,
19200 baud and 3840 baud.
The default setting from the factory is 9600 baud.
Please refer to Chart 6.10 (Page21) for details.
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