Rs232 Connecting - Jaycar Electronics DS-8704HI-S User Manual

3 RS232 Connecting

Material and tool
One twisted cable (8 pins), one standard RJ45 head, one or more DB25 or DB9
plug-in, a tool for RJ45, one electric iron, and some soldering tin.
Pin definition
To make 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
According to demand, the following three situations are considered to make the serial
port plug-in according to the corresponding relationship of the pin definition.
(1) When the serial port of the DVR is connected with the DTE device with DB25
plug-in (terminal like computer, annunciator, door access etc), the corrresponding
relationship is as follows:
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
125
Description