Brand Name:
ABB
Model Number:
IMHSS03
The IMHSS03 Hydraulic Servo Module positions a hydraulic actuator in manual or automatic control through a servo valve or I/H converter. It combines LVDT feedback, servo drive, hard-manual contacts and local diagnostic functions for turbine and process-valve control.
The IMHSS03 Hydraulic Servo Module positions a hydraulic actuator in manual or automatic control through a servo valve or I/H converter. It combines LVDT feedback, servo drive, hard-manual contacts and local diagnostic functions for turbine and process-valve control.
| 01LVDT feedback inputs | 4 analog secondary inputs for two LVDTs, two secondaries per LVDT |
|---|---|
| 02LVDT input rating | 24 V peak-to-peak; ±7 VDC common mode; 10 kΩ differential input impedance |
| 03LVDT excitation outputs | 2 analog primary outputs |
| 04Excitation frequency | 400 Hz to 15 kHz |
| 05Servo coil outputs | 4 total; two redundant selectable outputs with protection |
| 06Servo output selections | ±8, ±16, ±24, ±32, ±40, ±48, ±56 or ±64 mA, matched to the documented coil impedance |
| 07I/H output | 4 to 20 mA into 300 Ω maximum, or 20 to 160 mA into 15 Ω maximum |
| 08Position meter output | 4 to 20 mA into 300 Ω maximum |
| 09Unscaled feedback output | 2 mA into 5 kΩ minimum |
| 10Test output | 1 mA into 5 kΩ minimum |
| 11Contact inputs | 3 optically isolated 250 VDC inputs for raise, lower and trip bias |
| 12Hard-manual output | 1 independent optically isolated 250 VDC open-collector output |
| 13+5 VDC power | 576 mA nominal; 940 mA maximum |
| 14+15 VDC power | 15 mA nominal; 27 mA maximum |
| 15-15 VDC power | 12 mA nominal; 18 mA maximum |
| 16+24 VDC field power | 335 mA nominal; 570 mA maximum from termination |
| 17Mounting | One Module Mounting Unit slot; single printed circuit board |
| 18Front indicators | 9 LEDs |
| 19Operating temperature | 0 to 70°C (32 to 158°F) |
| 20Humidity | 5 to 90% RH to 55°C; 5 to 40% RH above 55°C, noncondensing |
| 21Altitude | Sea level to 3 km (1.86 mi) |
| 22Environment | Noncorrosive; IEEE-472 surge withstand stated in the manufacturer manual |
Used with INFI 90/Harmony rack controllers, commonly an IMMFP01/02/03, and normally paired with an IMFCS01 frequency counter for turbine governor applications. Manufacturer documentation lists NTHS03, NIDI01/NTDI01, NKAS02 and NKHS03 among the associated termination and cable hardware.
ABB identifies SPHSS13 as the direct replacement for IMHSS03. Even for a direct replacement, verify the installed LVDT type, coil current, termination, cable set, controller firmware and function-code configuration before work.
Original manufacturer source for servo outputs, LVDT interfaces, power, configuration, diagnostics and maintenance.
Official ABB summary of IMHSS03 function, turbine applications, FC55/FC150 use and associated turbine-control hardware.
ABB-identified SPHSS13 direct replacement path and documented design enhancements.
Pre-shipment check, antistatic protection and reinforced packing.
Prompt review under the written order terms with fault evidence.
Covers confirmed supply defects during the agreed period.
Part-number, revision and system checks before dispatch.
Send the Part Number, Quantity, Destination, Required Date and Machine/System Model. A clear nameplate photo helps confirm the request.
These models are separate sourcing references, not stated replacements for IMHSS03. Compatibility and availability must be confirmed independently.
Technical statements are limited to verified ABB/Bailey manufacturer documentation. Installation must follow the plant safety procedure and the documentation for the installed system revision.
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