{"product_id":"abb-bailey-infi90-imhss03-hydraulic-servo-module","title":"ABB Bailey infi90 IMHSS03 Hydraulic Servo Module","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIMHSS03 (IMHSS03)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-precision, microprocessor-driven valve position control module designed for the ABB Bailey INFI 90 and Harmony Rack ecosystems. Engineered for ultra-critical turbine governing loops within power generation plants, petro-chemical refineries, and heavy industrial mechanical drives, this module acts as the definitive hardware link between a multi-function processor (such as the IMMFP01\/02\/03) and electro-hydraulic servo valves or current-to-hydraulic (I\/H) converters. By regulating the precise current outputs sent to the servo mechanisms and reading localized dual-redundant Linear Variable Differential Transformer (LVDT) feedback loops, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIMHSS03\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eensures instant, deterministic throttle valve control. Deploying this module eliminates governor valve hunting, mitigates the risk of catastrophic turbine overspeed trips, and drastically lowers un-scheduled station downtime during sudden grid load rejections.\u003c\/p\u003e\n\u003ch3\u003eHardware Architecture and Loop Configuration\u003c\/h3\u003e\n\u003cp\u003eThe control layout of the IMHSS03 introduces high-performance, redundant processing capabilities designed to maintain continuous control loops under active field component degradation.\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDemodulator Autotuning Logic:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe card contains specialized internal algorithms that automatically tune the demodulator gain circuit matching the specific LVDT transformer parameters. This self-calibration removes manual potentiometer variance and mitigates thermal secondary voltage drift.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eActuator Output Layouts:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSupports multiple operational methods for the servo valves. Field engineers can set the card to run two active controlling servo valves simultaneously (dual parallel drive) or configure a single active master valve alongside an automated hot-standby secondary valve.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGalvanic and Optical Barrier Segregation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module features enhanced analog-to-digital (A\/D) and digital-to-analog (D\/A) converters isolated up to full industrial grading. This architecture isolates the INFI 90 backplane from external field ground loops, high-voltage switching surges, and electromagnetic interference (EMI) originating from the turbine deck.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eComprehensive Technical Specifications\u003c\/h3\u003e\n\u003ch3\u003eEnvironmental Characteristics\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironmental Property\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eOperational Specifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAmbient Operating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eStorage and Transport Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-40 to 75 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRelative Humidity Span\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 to 95% (Non-condensing)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAir Quality Demands\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eClean, dry, non-conductive, non-corrosive industrial air\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCooling Topology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNatural convection through modular mounting unit (MMU) slots\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePower Consumption Demands\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Supply Rail\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Loading Values\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Power Dissipation\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e+5 VDC Rail\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e240 mA typical\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.2 W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e+15 VDC Rail\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e12.3 mA typical\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e185 mW\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e-15 VDC Rail\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e12.3 mA typical\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e185 mW\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAnalog Input Performance (LVDT Interfaces)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Property\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngineering Metrics and Limits\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of LVDT Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 channels (Fully redundant interface blocks)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eLVDT Configurations\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSupports 3-wire, 4-wire, or 5-wire AC or DC LVDT types\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eA-to-D Resolution Matrix\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 bits maximum resolution\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Voltage Limits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 10 VDC, or up to 7.5 VRMS AC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eLVDT Excitation Frequency\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.0 kHz to 10.0 kHz (Software selectable options)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eExcitation Output Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e50 mA maximum per channel drive\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAnalog Output Performance (Servo Drive Outputs)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Property\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngineering Metrics and Limits\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of Servo Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 channels (Configurable for simultaneous or standby modes)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eD-to-A Resolution Matrix\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16 bits resolution\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Current Configurations\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePlus or minus 10 mA, plus or minus 20 mA, plus or minus 40 mA, plus or minus 50 mA, or plus or minus 100 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMaximum Load Impedance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUp to 1000 Ohms at full 20 mA output span\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eLoop Isolation Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e500 VDC continuous isolation from internal logic blocks\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDigital Input \/ Output Technical Data\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eI\/O Property\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eConfiguration Values\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDigital Inputs (DI)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3 isolated input channels (For turbine trip, manual takeover, or interlocks)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDI Input Voltage Span\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 VDC nominal (Internal or external loop wetting)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDigital Outputs (DO)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 isolated solid-state or relay driver output channels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDO Current Sinking Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e250 mA maximum per output channel line\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow do you configure the different output current ranges on the IMHSS03?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe choice of servo drive current (e.g., plus\/minus 10 mA up to 100 mA) is controlled by a combination of physical hardware onboard dipswitches located on the printed circuit board assembly and the Function Code 150 block parameters inside the Multi-Function Processor configuration. These settings must match the exact specifications on the servo valve nameplate before powering up the system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the IMHSS03 handle older 3-wire LVDT feedback sensors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The module is fully programmable to interface with 3-wire, 4-wire, or 5-wire LVDT sensors. The exact sensor type and wiring configuration are specified via termination unit jumper positions and the system block code variables.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does a flashing amber\/red combination on the status LEDs indicate?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe card features 9 diagnostic LEDs. A flashing combination indicates a runtime process exception. This typically means an LVDT feedback wire breakdown, an open-circuit fault on the servo current loop, or that the valve position error has exceeded the pre-programmed tracking deviation deadband for longer than the safe timeout limit.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Engineering and Installation Manual\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTermination Unit Dipshunt and Jumper Alignments:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePrior to inserting the module card into the slot, you must set the physical dipshunts and jumpers on the NTMP01 or NKTU01 termination units according to your specific LVDT type (AC or DC excitation). Incorrect jumper alignment can apply damaging DC voltages across an AC LVDT coil, causing permanent sensor failure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eShield Matrix and Grounding Protocol:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAll field wiring leading to the servo valves and LVDT sensors must utilize independent twisted, shielded pair cables. Ground the shield braid exclusively at the termination unit side of the cabinet ground copper bus bar. Never connect the shield to earth at the turbine valve body, as the high ground potentials on the turbine deck will drive massive ground loop currents through the instrumentation lines, corrupting the 24-bit resolution signals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFunction Code 150 Automated Calibration Procedure:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eLock out the primary hydraulic header pressure and manually verify that the turbine valves can stroke freely from 0% to 100% without mechanical binding. Execute the automated calibration command via Function Code 150 through your engineering terminal. The processor will map the stroke limits and write the newly derived demodulator gain factors directly into the non-volatile EEPROM memory of the module.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eModule Mechanical Retention and Seating:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAlign the board edges with the non-conductive card guides of the single-slot MMU housing. Slide the module in firmly until you feel the rear DIN connectors mate with the backplane. Tighten the top and bottom captive faceplate thumbscrews to 0.4 Nm (3.5 in-lbs) to ensure the card remains properly seated and grounded despite local industrial floor vibrations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":52668612510059,"sku":"IMHSS03","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/abb-imhss03-bailey-infi-90-hydraulic-servo-slave-module-xcmq0y20iry_7c936c8e-c5e8-49e4-80ff-512d4d3d72d5.jpg?v=1765535540","url":"https:\/\/www.plcprotech.com\/products\/abb-bailey-infi90-imhss03-hydraulic-servo-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}