Network Communication Interfaces; 10Base-T Rj-45 Pinout; 10Base-T Crossover Wiring; Figure 2.4 Rj45 Pinout - Omega iServer DPi8 User Manual

2.5 Network Communication Interfaces

2.5.1 10Base-T RJ-45 Pinout

The 10BASE-T Ethernet network (RJ-45) system is used in the iServer for network
connectivity. The 10 Mbps twisted-pair Ethernet system operates over two pairs of wires.
One pair is used for receiving data signals and the other pair is used for transmitting data
signals. This means that four pins of the eight-pin connector are used.

2.5.2 10Base-T Crossover Wiring

When connecting the iServer directly to the computer, the transmit data pins of the
computer should be wired to the receive data pins of the iServer, and vice versa. The
10Base-T crossover cable with pin connection assignments are shown on Figure 2.5.
Use straight through cable for connecting the iServer to an Ethernet hub.
The ports on the hub are already crossed.
Pin
1
2
3
4
5
6
7
8

Figure 2.4 RJ45 Pinout

Figure 2.5 10Base-T Crossover Cable Wiring

Name
+Tx
-Tx
+RX
N/C
N/C
-Rx
N/C
N/C
8
Description
+ Transmit Data
- Transmit Data
+ Receive Data
Not Connected
Not Connected
- Receive Data
Not Connected
Not Connected