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The IMHSS03 Hydraulic Servo Module is a valve position con- trol module used in an INFI 90® system to control the speed of a turbine. It interfaces a servo valve or an I/H converter to an IMMFP01, IMMFP02 or IMMFP03 Multi-Function Processor Module. The multi-function processor (MFP) module controls the position of a steam or gas turbine throttle valve by sending a position demand to the hydraulic servo (HSS) module.
Technical Specification: IMHSS03
ABB Bailey Hydraulic Servo Module
Printed Circuit Board
Turbine Control Systems
Manufacturers ABB, Bailey
Model(s)ABB Bailey Infi 90, ABB Bailey Infi 90 and Net 90
Additional Information Bailey ETSI, IMHSS03 Hydraulic Servo Module provides an interface through which a processor module can control a hydraulic actuator via a servo valve.
The HSS module drives its outputs to open or close the throttle valve to match the position demand. The MFP module uses the IMFCS01 Frequency Counter Module to measure the turbine speed. The frequency counter module measures turbine speed by counting and timing pulses from a magnetic pickup on the turbine shaft. The MFP module uses this count to calculate turbine speed and calculate a new demand based on a set point
IMASI13 Analog Input Module: 5 VDC at 500 mA typical, maximum 750 mA
IMASI23 Analog input: 4 to 20 mA, 0 to 5 VDC,1 to 5VDC, 0 - 10VDC, 0 - 100 mVDC, thermocouple, RTD
IMASO11 Analog output: 4 to 20 mA, 1 to 5 VDC
IMCIS22 Control I/O (4 analog in, 2 analog out, 3 digital in, 4 digital out)
IMDSI13 Digital input: 24 VDC
IMDSI14 Digital input: 48 VDC
IMDSI22 Universal digital input: 24 VDC, 48 VDC, 125 VDC, 120 VAC
IMDSM04 Pulse input
IMDSO14 Digital output: 24 VDC, 48 VDC
IMDSO15 Digital output: Onboard electromechanical relay
IMFCS01 Frequency counter
IMFEC11 Analog input: 4 to 20 mA, -10 to +10 VDC, FSK, 1 - 5VDC, 0 - 1VDC, 0 - 5VDC, 0 - 10VDC
IMFEC12 Analog input: 4 to 20 mA, -10 to +10 VDC, 1 - 5VDC, 0 - 1VDC, 0 - 5VDC, 0 - 10VDC
IMHSS03 Hydraulic servo
IMQRS22 Quick response I/O (4 analog in, 2 analog out, 3 digital in, 4 digital out)
IMSED01 SOE digital input (with 16 SOE digital inputs)
IMSET01 SOE timing (with 16 SOE digital inputs and a timesynch input)
