ABB IMHSS03

Description

ABB IMHSS03 is a hydraulic servo module,mainly used for valve position control in ABB Symphony control system,especially playing an important role in controlling steam turbine speed.The following is a detailed introduction to ABB IMHSS03:

I.Product Overview

As a member of the Harmony series,ABB IMHSS03 is an intelligent module with an on-board microprocessor,memory and communication circuit.It is designed for use with servo valves or I/H converters to provide manual or automatic control of hydraulic actuators.

II.Main features

Automatic adjustment of demodulator gain:

IMHSS03 can automatically adjust the demodulator gain to provide a more optimized response and ensure the stability and accuracy of the system.

Redundant LVDT interface:

The module has a redundant LVDT(Linear Variable Differential Transformer)interface,which can handle AC or DC LVDT transformers to improve the reliability and flexibility of the system.

High-resolution A/D and D/A conversion:

IMHSS03 uses high-resolution A/D and D/A converters to ensure accurate signal acquisition and output,and improve the control accuracy of the system.

ABB IMHSS03

Digital and analog input/output isolation:

The module provides isolation of digital and analog input/output,effectively preventing signal interference and damage,and improving the system’s anti-interference ability.

Microprocessor support:

IMHSS03 is equipped with a 16-bit microprocessor,which is responsible for controlling on-board functions,communicating with the controller,analog-digital processing,and performing self-test tasks.

Hard manual loop:

In the event of loss of controller communication,the operator can manually change the actuator position through the hard manual loop to ensure the system’s emergency operation capability.

III.Typical applications

Typical applications of ABB IMHSS03 include control of turbine throttling and control valves,gas turbine fuel valves,inlet guide vanes,and nozzle angles.By adjusting the current of the servo valve,the module can set an actuator to achieve precise control of the turbine speed.

ABB IMHSS03

4.Technical Parameters

The technical parameters of ABB IMHSS03 include:

Power requirements:+5VDC±5%,+15VDC±5%,-15VDC±5%and+24VDC±10%

Power consumption:varies according to different voltage levels,typical values​​are 2.88W(+5VDC),0.23W(+15VDC),0.18W(-15VDC)and 8.04W(24VDC)

LVDT secondary input:4 analog inputs,2 LVDT secondary inputs(each with 2 secondaries)

Digital input/output:24Vpp±7VDC common mode,10kΩdifferential input impedance;3 optically isolated(250VDC)contact inputs(up,down and trip deviation);1 independent,optically isolated(250VDC)open collector output(hard manual)

Analog output:4 analog outputs,2 redundant analog outputs with servo output protection(optional)

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