The RX3i I/O Link Interface Module operates as a slave on a
Fanuc I/O Link network. It can exchange either 32 or 64 inputs
and outputs with the master. Typical masters on the I/O Link
include all modern FANUC CNCs and Power Mates,

PACSystems controllers and Series 90 PLCs equipped with an
I/O Link Master Module.
An I/O Link Interface Module occupies one module slot in an
RX3i backplane. It can be installed in any available backplane slot.
The maximum number of I/O Link Interface Modules that can be
installed in the backplane depends on the power that is available
from the power supply. To determine the exact number of
modules allowed in your system, see the information on power
supplies in chapter 3.

Usually, when there are multiple I/O Link Interface Modules in the
same RX3i system, they are on separate I/O Links. However, it
is possible to have more than one I/O Link Interface Module in
the system connected to the same link, if that suits the needs of
the application.
Module Description
The module’s front cover is removable. A jumper plug inside the front cover is used to set up the
module as a 32–point or 64–point I/O module.
Serial Ports
The front of the module has two 20–pin connectors that are used to attach the I/O Link cable.
One connector is for the cable to the previous device on the link––either the master or another
slave. The other connector is for the cable to the next slave on the link, if there is one. See the
RX3i I/O Link Modules User’s Manual, GFK-2358 for more information. Signal levels are
RS422/485 compatible.
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