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RS232 Connection
Materials and Tools Required:
CAT5 cable (4 twisted pairs).
Standard RJ45 plug connector. One or more DB25 or DB9 plug-in.
An RJ45 crimp tool.
Soldering iron and solder.
Pin Definition: Configure the RJ45 according to the following pin definition (I means DVR
input, O means DVR output).
Pin index
1
2
3
4
5
6
7
8
The configuration of the cable changes depending on the application. The following four
configurations are provided.
1. The serial port of the DVR is connected with a DTE device with DB25 plug-in
(terminal like computer, annunciator, door access etc).
Name
I/O
DCD
I
Carrier Detect
RxD
I
Receive Data
TxD
O
Transfer Data
CTS
I
Clear Data
RTS
O
Request to Send
DTR
O
Terminal Device Ready
GND
Ground
—
—
Null
135
Description
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