GE Mark VIe - Page 13

Outputs Driven from
Common I/O Module
Voting at I/O Module
Basic forms of output module:
Relays – Voting occurs at a relay driver
Relays – Voting occurs with 2/3 contact voting
Analog – Median select with a passive, current-sharing circuit
Analog – Voting occurs with a 3-coil servo
Extended Voting at Field Device
(Example: 3 Coil Servo Valve Actuator)
Typical nuclear configuration
Valve
Regulator
Valve
Ref.
Valve
Regulator
Valve
Ref.
Valve
Regulator
Valve
Ref.



3 Coil
Servo Valve
Excitation
Hydraulic
Cylinder

Position Feedback
Position Feedback
Excitation
Position Feedback
Excitation
Instruction Guide GEI-100728A 13
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