Rockwell Automation Publication 750COM-UM100A-EN-P - June 2021
9
Chapter 1 Getting Started
B is connected to an optional external power supply to allow pass-thru of data
to TLink module C even if the drive that TLink option module B is installed in
is not powered.
As an alternative to an external power supply, TLink option modules can
maintain pass-thru of data with an appropriately sized external 24V DC power
source that is connected to the 24V DC control bus terminals that are located in
the control bay and the input bay of 755T products.
Figure 1 - TLink Modules in Linear Network
Ring Topology
A TLink ring topology network allows you to choose a new leader without
changing fiber-optic connections. An auxiliary power supply can be used as in
a linear network to maintain communication when a drive between the leader
and any other follower is powered down. Ring networks are unidirectional.
shows TLink option modules in a ring network. There is one leader
device and up to three followers, which supports four drives. The following
illustration shows a TLink network with three drives that are connected
through TLink option modules. TLink option module A is the leader TLink
option module. TLink option modules B and C are the followers. TLink module
A
B
C
