GE IS200TSVCH1A Servo Input/Output Terminal Board

GE IS200TSVCH1A Servo Input/Output Terminal Board

Functional Description

The IS200TSVCH1A servo terminal board provides two channels consisting of bi-directional servo current

outputs, LVDT position feedback, LVDT excitation, and pulse rate flows inputs. It provides excitation for, and

accepts inputs from, up to eight LVDT valve position inputs. There is a choice of one, two, three, or four

LVDTs for each servo control loop. The two pulse rate inputs are used for gas turbine fuel flow measurement.

Each servo output is equipped with an individual suicide relay under firmware control that shorts the PSVO

output signal to signal common when de-energized, and recovers to nominal limits after a manual reset

command is issued. Diagnostics monitor the output status of each servo voltage, current, and suicide relay.

Each of the servo output channels can drive either one or two-coil servos in simplex applications, or two or

three-coil servos in TMR applications. The two-coil TMR applications are for 200# oil gear systems where

each of two control pack drive one coil each, and the third control pack has no servo coil interface. Servo

cable lengths up to 300 m (984 ft) are supported with a maximum two-way cable resistance of 15 Ω. Since

there are many types of servo coils, a variety of bi-directional current sources are jumper selectable.

Technical Specifications