9
2.5 Ethernet Connection Cable Preparation
1. Material and tool
A twist cable (8 cores, length depends on the actual demand, but
less than 100m), 2 standard RJ45 connectors, 1 special tool for
RJ45.
Suggestion:
Use a network cable test tool to test the cable made.
2. Pin definition
The pin sequence of RJ45 as follows:
Figure 2-7
Prepare the network cable based on the demand, there're two
conditions as follows:
(1) Follow below method to make the network cable when DVR is
connected with HUB or the network switcher:
Figure 2-8 Parallelism of direct cable
(2) Follow below method to make the twisted network cable when
DVR is directly connected with a client terminal like PC.
Figure 2-9 Parallelism of cross cable
2.6 RS-232 Connection Cable Preparation
1. Material and tool
One twisted cable (8 cores), one standard RJ45 connector, one or
more DB25 or DB9 plug, a special tool for RJ45, one soldering iron,
and some solder.
2. Pin definition
Refer to Figure2-7 for the pin sequence of RJ45 connector. Prepare
the RJ45 terminal according to the following pin definition.
Pin No.
Name
Definition
1 NC
-
2 GND
Grounding
3 NC
-
4 TXD
Transmit
data
5 RXD
Receive
data
6 NC
-
7 GND
Grounding
8 NC
-
DB9 is 9-pin connector; and DB25 is 25-pin connector. According
to the connector type, DB9 or DB25 can be divided into male and
female type connector. Therefore there are four types of connectors.
The pin definition as follows:
Figure 2-10 DB9 male type connector
Pin definition: 2: RXD
3: TXD
5: GND
Figure 2-11 DB9 female type connector
Pin definition: 2: TXD
3: RXD
5: GND
Figure 2-12 DB25 male type connector
Pin definition: 2: RXD
3: TXD
7: GND
Figure 2-13 DB25 female type connector
Pin definition: 2: TXD
3: RXD
7: GND
According to demand, prepare serial port connection cable based on
