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3-2 Genius Modular Redundancy Flexible Triple Modular Redundant (TMR) System
User’s Manual – March 1995
GFK-0787B
Overview
The output subsystem is the part of a GMR system that provides output data. It may consist of:
GMR Output groups of 4 discrete blocks
Individual non-GMR discrete and analog blocks
The following illustration represents basic elements of an output subsystem.
Load
4-Block Output Group
No redundancy
or
Hot Standby
or
Duplex
ABC
ABC ABC
A
B
DC
In a 4-block output group, each field output is supported by two Genius source outputs
connected in parallel on one side of the actuator and two Genius sink outputs connected
in parallel on the other. Each block in the group receives outputs from each of the three
separate processors. Three Genius busses are used.
Individual Genius blocks can also be connected to the system. These blocks may be
configured for either hot standby or duplex CPU redundancy if desired.
Types of Blocks in the Output Subsystem
The following discrete block versions can be configured for GMR operation. They will
perform output voting and autotesting when used in GMR mode:
24/48 VDC 16-Circuit Source block:
24/48 VDC 16-Circuit Sink block:
12/24 VDC 32-Circuit Source block.
5/12/24 VDC 32-Circuit Sink block:
IC660BBD020M
IC660BBD021M
IC660BBD024N
IC660BBD025N