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2-3GFK-0787B Chapter 2 Input Subsystem
GMR Input Groups
The configuration can include as many as 128 16-circuit voted discrete and 256 four-input analog
input groups. (The actual I/O capacity of the system depends on the CPU type. See page 1-9).
In an system that has normally-energized discrete inputs, the following combinations of
sensors and Genius inputs can be used with Genius Modular Redundancy.
one sensor to three Genius inputs, three busses, three PLCs
one sensor to two Genius inputs, two busses, two PLCs
One Input Sensor
Triple Genius Busses
Triple PLCs
Optional Zener
diode for line
monitoring
Shaded items omitted
for duplex operation
three sensors to three Genius inputs, three busses, three PLCs
two sensors to two Genius inputs, two busses, two PLCs
Triple Input Sensors
Triple Genius Busses
Triple PLCs
Optional Zener
diodes for line
monitoring
Shaded items omitted
for duplex operation
one sensor to one Genius input
Single blocks can be configured as non-voted GMR blocks, allowing them to take
advantage of the GMR autotest feature. Both discrete and analog blocks can be used;
however, analog blocks cannot be autotested.