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1-5GFK-0787B Chapter 1 Introduction
Operation Overview
Genius Modular Redundancy has been developed for use in systems that have static or nearly
static I/O under normal operating conditions. The system may have:
Normally-on inputs with normally-energized outputs, as in emergency shutdown systems.
Normally-off inputs with normally-deenergized outputs, as in fire and gas detection
systems.
Genius Modular Redundancy provides:
high degree of self-test and monitoring with diagnostics
fault tolerance.
support for centralized or fully distributed systems.
Scalable voting: 2-out-of-3, 2-out-of-2, 1-out-of-2, or simplex.
The example that follows illustrates how the GMR input subsystem, PLC subsystem, and
output subsystem combine to provide a high-availability, high-reliability system.
Input Subsystem
Output Subsystem
PLC Subsystem
Load
PLC A PLC CPLC B