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ICS Regent +Plus
PD-7009
I/O Transceiver Modules
I/O transceiver modules provide an interface between the
processor modules in the controller chassis and the I/O modules in
the I/O chassis. Three I/O transceiver modules are installed in the
three left slots of each I/O chassis.
Features
• Three modules per I/O chassis for triple redundant operation.
®
I/O XCVR
(T7310)
Issue 1, September, 04
• Interfaces processor modules to I/O modules.
• Hot replaceable.
• Front panel indicators on each module show active and fault
status.
• TÜV certified for safety, Risk Class 5.
I/O transceiver modules are triple redundant and can be removed
and replaced without interrupting system operation.
Module Operation
A block diagram of a typical I/O transceiver module is shown in
Figure 1.
Each I/O transceiver module communicates with one of the three
processor modules in the controller assembly. During I/O
Safetybus communications, the control logic on the I/O transceiver
module reads the I/O chassis’ identification code from the I/O
commands and compares them to the chassis’ identification switch
settings. Appropriately addressed I/O commands are directed
along the chassis’ backplane Safetybus to the I/O modules.
Industrial Control Services (Issue 1) 1
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I/O Transceiver Modules (T7310)
Figure 1. Block Diagram of I/O Transceiver Module.
I/O module responses are buffered and transmitted back along the
chassis’ backplane Safetybus to the I/O transceiver, and from the
I/O transceiver along the I/O Safetybus cable to the processor
modules.
Triplicated power is cabled into the I/O chassis and distributed to
the I/O transceiver modules. Each I/O transceiver module
receives power from one of the three I/O power supplies. Power
regulation circuits in the I/O transceiver modules provide the
necessary regulated voltages for the module’s electronics. Should a
single power supply fail, an interlock signal from the failed power
supply will cause the I/O transceiver it normally powers to shut
down.
2 (Issue 1) Industrial Control Services