2 rs-232 connect cable made method – Planet Technology DVR-470 User Manual
Page 91
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Page 91
The corresponding relationship of cross cable
2 RS-232 connect cable made method
DVR-802x has standard DB9 RS-232 interface, like PC COM port.
Pin definition
“I” means DVR input and O means DVR output.
Pin index
Name
I/O
Description
1 DCD I
Carrier
Detect
2 RXD I
Receive
Data
3 TXD O
Transfer
Data
4
DTR
O
Terminal Device Ready
5 GND
Ground
6 -- --
--
7 RTS O
Request
to
Send
8 CTS I
Clear
Data
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