GE Mark VIe, Инструкция по эксплуатации

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Sensor A
+24Vdc
Sensor B
+24Vdc
Sensor C
+24Vdc
Non-Fanned Inputs to Three Controllers
1. Failure of 1 I/O Pack inhibits monitoring of 1 sensor
2. Smaller & more cost-effective than “fanned” inputs (3 versus 9 I/O Packs &
IONET communications)
Mark VIe Controllers Mark VIeS (Safety) Controllers
Mark VIe I /O Modules Mark VIeS (Safety) I/O Modules
Common IONET
Shared I/O Modules
Benefits:
1. Reduced field instrumentation and wiring
2. Fewer I/O modules
3. Less IONET switches
Non-critical data that is being used for non-essential monitoring is usually implemented without redundancy. Redundant and
non-redundant I/O coexists in most control systems.
The overall scheme of software voting, diagnostics, and online repair capability is known as Software Implemented Fault
Tolerance (SIFT). Its significance is that application software in each of the three control sections performs the voting rather
than a single hardware voter that would compromise reliability by introducing a potential single point failure.
12 GEI-100728A Mark VIe Controls System Redundancy Options
Public Information