ABB UFC718AE01 HIEE300936R0001 programmable control module
Commanded output status from the
processors are received by an output
module which, using a 2oo3 hardware
voter, sets the outputs to the field.
Any discrepancy is detected by the
micro-controllers and reported to the
processors.
All input and output modules can be
optionally configured with a hot spare
partner module. This allows repairs to
be carried out without affecting the
operation of the system.
Triguard SC300E Chassis
System
There are four basic types of chassis, all
using the same mechanics, each
providing 10 slot positions for I/O
modules and redundant power supplies.
• The Main Chassis
One per system is required and is
always complete with two power
supply units, three processor
modules, the chassis backplane with
triple bus systems and plug/socket
system module connectors.
• An Extension Chassis
Up to 14 chassis can be connected
to a main chassis to suit the capacity
master bus extender modules. The
master chassis can service up to four
remote chassis.
• A Remote Chassis
Always equipped with two power
supply units and three fibre optic
slave bus extender modules.
A remote chassis can be sited up to
2km away from a remote master.

Processor
Each Triguard SC300E TMR system
contains three processors. Each
processor operates asynchronously in
parallel with the other two processor
modules and receives power from the
redundant power supply units in the
main chassis. A triplicated bus system
on the chassis backplane connects
Key features of the processor modules:
• Intel processor
• Battery backed static RAM for
application logic
• RAM Battery backup supply for six
months
• 1 Mbyte of EPROM
• Real time clock for data logging to
10ms resolution