Rockwell Automation 1786-series ControlNet Fiber Media Planning and Installation Guide - Manual (Page 61)

Rockwell Automation Publication CNET-IN001C-EN-P - October 2011 61
Install Your Fiber Repeater Modules and Repeater Adapters Appendix A
The locking tab should snap into position and lock the module to the
DIN rail.
4. If necessary, remove the protective caps from the transmit and receive
fiber channels.
TIP Use a screwdriver to move the locking tab downward, if the
module is not secured.
WARNING: Removal and insertion under power (RIUP) is not supported.
These modules must be powered down while connecting and
disconnecting them from any interconnected modules.
If 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.
If Then
You will use a channel Remove the protective cap from the channel.
You will not use a channel Keep the protective cap on to protect the
channel from dust.
You place the module in storage
42543
41900
Protective Cap
DIN Rail
Protective
Backplane Cap
Both sides of the module contain a backplane connector.