Rockwell Automation 1756-Enxxx_Ewxxx EtherNet/IP Modules Installation Instructions - Manual (Page 33)

Rockwell Automation Publication ENET-IN002F-EN-P - January 2014 33
Install a 1756 EtherNet/IP Communication Module Chapter 1
2. Check the power supply and module status indicators and alphanumeric
display to determine that the power supply and module are operating
properly.
The alphanumeric display should cycle through the following states:
TEST - PASS - OK - REV
x.x, where x.x is the module’s firmware revision.
The display then alternates between OK and port link status for both
ports.
This graphic shows the front of the module for these modules (extended-
temperature versions [catalog numbers 1756-EN2TXT and 1756-
EN2TRXT] not shown).
Install or Remove the Module
Under Power You can install or remove this module while chassis power is applied.
LINK LINK
LINK LINK NET NET OK OK
32452 32452
NET NET OK OK
1
LNK1 LNK1 LNK2 LNK2 NET NET OK OK
LNK1 LNK1
1
2
LNK2 LNK2 NET NET OK OK
32452 32452
Single-port
Module Dual-port
Module
LINK LINK NET NET OK OK
Single-port
Module Dual-port
Module
WARNING: When you insert or remove the module while backplane power is
on, an electrical arc can occur. This could cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
Repeated electrical arcing causes excessive wear to contacts on both the module
and its mating connector. Worn contacts may create electrical resistance that can
affect module operation.
ATTENTION: Although the module is designed to support RIUP, when you
remove or insert the module with field-side power applied, unintended
machine motion or loss of process control can occur. Exercise extreme caution
when using this feature.