GE Mark VIe System Manual page 46

The following figure displays three sensors, each one fanned and then software implemented fault tolerance (SIFT) voted.
This provides a high reliability system for current and contact inputs, and temperature sensors.
Three Sensors, Each One Fanned and Voted, for Medium-to-High Reliability Applications
Highly reliable speed input applications are brought in as dedicated inputs and SIFT voted. The following figure displays this
configuration. Inputs such as speed control and overspeed are not fanned so there is a complete separation of inputs with no
hardware cross coupling which could propagate a failure. RTDs, thermocouples, contact inputs, and 0-20 mA inputs can also
be configured this way.
Three Sensors with Dedicated Inputs, Software Voted for High Reliability Applications
46 GEH-6721_Vol_I_BP GEH-6721_Vol_I Mark VIe and Mark VIeS Control Systems Volume I
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