ProSoft Technology MVI69E-MBS - Manual (Page 151)

MVI69E-MBS ♦ CompactLogix Platform Reference
Communication Module User Manual
ProSoft Technology, Inc. Page 151 of 162
January 6, 2014
7.5 Ethernet Port Connection
7.5.1 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 port on the module is Auto-Sensing. A standard Ethernet straight-
through cable or a crossover cable can be used when connecting the module to
an Ethernet hub, a 10/100 Base-T Ethernet switch, or directly to a PC. The
module detects the cable type and uses the appropriate pins to send and receive
Ethernet signals.
Some hubs have one input that can accept either a straight-through or crossover
cable, depending on a switch position. In this case, ensure the switch position
and cable type agree.
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-
7.5.2 Ethernet Performance
Ethernet performance on the MVI69E-MBS module can affect the operation of
the MBS application ports in the following ways.
 Accessing the web interface (refreshing the page, downloading files, and so
on) may affect MBS performance
 High Ethernet traffic may impact MBS performance (consider using managed
switches to reduce traffic coming to module port).