Emerson ControlWave EFM Instruction Manual page 63

Revised Dec-2013
Table 2-17. Ethernet 10/100Base-T CPU Module Pin Assignments
Pin
1 Transmit Data+ (Output)
2 Transmit Data– (Output)
3 Receive Data+ (Input)
4 Not connected
5 Not connected
6 Receive Data– (Input)
7 Not connected
8 Not connected
: You can swap TX and RX at the hub.
Note
You can connect two nodes in a point-to-point configuration without
using a hub. However, you must configure the cable so that the TX+/-
Data pins connect to the RX+/- Data pins (swapped) at the opposite
ends of the cable (see Figure 2-30).
Figure 2-30. Point-to-Point 10/100Base T Ethernet Cable
The maximum length of one segment (CPU to hub) is 100 meters (328
feet). The use of Category 5 shielded cable is recommended.
Installation
ControlWave EFM Instruction Manual
Description
2-43