Use trunk line terminators – Rockwell Automation 1786-RPCD ControlNet Modular Repeater Dual Copper Module User Manual
Page 12

12 ControlNet Dual Copper Repeater Module
Publication 1786-IN001B-EN-P - May 2004
8. Connect the module wiring as shown in Connect the Module For Coax Channels 1
and 2 on page 14.
9. Ground your DIN rail in accordance with local codes using a minimum #14 AWG
wire. See page 12 for DIN rail ground wire example.
Use Trunk Line Terminators
When you are not connecting a trunk line to a channel on the 1786-RPCD repeater module,
connect a 75
Ω
terminating resistor (1786-XT) to maintain the integrity of your network.
If:
Then:
you are not going to use a channel
keep the terminator on an unused channel for optimal
network performance
you connect another repeater module or repeater
adapter to the right backplane connector
remove the protective backplane cap and save the
cap for future use
you are not going to connect a module to the right
backplane connector
leave the backplane cap attached
the module is in the right-most position
attach a DIN rail end anchor
31494-M
DIN rail
Terminator
Protective
backplane cap
The left side of the module
(not shown here) also
contains a backplane
connector.
Be certain to ground the DIN rail
with a minimum #14 AWG wire.