I. Basic Information
Brand: ABB Bailey (Bailey)
Model: NTHS03
Product Full Name: Hydraulic Servo Termination Unit (TU Terminal Unit)
System: INFI90 / Symphony Plus DCS System
Core Module: Specifically designed for IMHSS03 and SPHSS13 hydraulic servo sub-modules (the SPHSS13 dedicated wiring base you queried)
Original Factory Material Code: 6640635A1
Power Supply: DC24V, Rated Power Consumption 0.6A, Onboard 3A Slow-Melting Protection Fuse
Core Function
As a signal transfer bridge between servo cards and on-site equipment:
Connects 2 dedicated flat cables to the SPHSS13/IMHSS03 servo control cards within the rack;
Extrudes external terminal blocks: servo valve drive current output, dual-channel LVDT valve position displacement feedback, electromagnetic valve trip, valve position switch quantity feedback, external power connection;
Includes built-in signal filtering, short-circuit protection, jump configuration terminals, achieving strong and weak current isolation, resisting strong electromagnetic interference in power plants and metallurgical sites;
One single terminal board supports dual-channel servo valves + dual redundant LVDT wiring, suitable for steam turbine DEH system main steam valve, regulating valve redundant control scheme.
Hardware Structure Configuration
2 sets of high-density European sockets: Connects flat communication cables of servo main control cards
3 sets of screw wiring terminal blocks: All instrument and actuator cables for on-site connection
4 sets of DIP jumpers (J1~J4): Can set LVDT excitation mode, internal / external power supply, single / dual redundant channel mode
Built-in 3A fuse: Overload and short-circuit protection for servo valve circuits, preventing servo card damage
7-inch standard square PCB board, wall-mounted installation in control cabinet, protection level IP20
Main Connected Signal Types
Servo valve coil ± current drive output
Dual-channel AC-LVDT/DC-LVDT oil actuator position feedback signal
Servo trip electromagnetic valve control circuit
Full open and full close position limit switch quantity
24VDC external power supply circuit
Typical Application Scenarios
For DEH electro-hydraulic regulation systems of thermal power and thermal power turbines, compatible with control of high-pressure regulating valves, medium-pressure regulating valves, main steam valve oil actuators in the servo circuits; also applicable to water turbine speed regulation and large-scale high-precision position control hydraulic servo systems.
There are no reviews yet.