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
Public Information
Summary of Contents for Mark VIe
Page 19: ...Public Information...
