ProSoft Technology MVI56E-DNPNET - Manual (Page 120)

Contents MVI56E-DNPNET ♦ ControlLogix Platform
User Manual DNPNET Ethernet Client/Server Communication Module
Page 120 of 140 ProSoft Technology, Inc.
February 13, 2015
4.5 Cable Connections
4.5.1 Ethernet Cable Specifications
The recommended cable is Category 5 or better. A Category 5 cable has four twisted pairs
of wires, which are color-coded and cannot be swapped. The module uses only two of the
four pairs.
The Ethernet ports on the module are Auto-Sensing. You can use either a standard Ethernet
straight-through cable or a crossover cable when connecting the module to an Ethernet hub,
a 10/100 Base-T Ethernet switch, or directly to a PC. The module will detect the cable type
and use the appropriate pins to send and receive Ethernet signals.
Ethernet cabling is like U.S. telephone cables, except that it has eight conductors. Some
hubs have one input that can accept either a straight-through or crossover cable, depending
on a switch position. In this case, you must ensure that the switch position and cable type
agree.
Refer to Ethernet Cable Configuration (page 120) for a diagram of how to configure Ethernet
cable.
4.5.2 Ethernet Cable Configuration
Note: The standard connector view shown is color-coded for a straight-through cable.
Crossover cable Straight- through cable
RJ-45 PIN RJ-45 PIN
1 Rx+ 3 Tx+
2 Rx- 6 Tx-
3 Tx+ 1 Rx+
6 Tx- 2 Rx-
RJ-45 PIN RJ-45 PIN
1 Rx+ 1 Tx+
2 Rx- 2 Tx-
3 Tx+ 3 Rx+
6 Tx- 6 Rx-
4.5.3 Ethernet Performance
High Ethernet traffic may impact DNPNET performance, consider one of these options:

Use managed switches to reduce traffic coming to module port