ABB IMHSS03
ABB IMHSS03 - Image 2

ABB IMHSS03

Product Brief:​ The IMHSS03 (sometimes referenced as Harmony SOE Server / Historical Sequence Server) is a specialized INFI 90/ Harmony module that collects SOE records from IMFEC12 / IMFCS01 modules across multiple C.W. racks, time-synchronizes them to a common high-precision clock (IRIG-B or NTP), and makes them available to the plant SOE workstation / historian. It may also serve as a gateway for uploading historical trend data from Harmony controllers to a plant information network. In later Symphony Plus evolutions this function migrates to software (SOE Server in OPC server), but IMHSS03 was the hardware SOE concentrator in classic INFI 90 plants.

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Category: SKU: ABB IMHSS03

Description

ABB IMHSS03

  • Technical Specifications (typical):
    • Function: SOE event collection from up to N C.W. nodes (system-dependent — typically 32–64 SOE-capable modules); time-tag correlation to μs level via IRIG-B or NTP-referenced clock
    • Interfaces: C.W. bus (backplane connection to IEMMU21 rack); serial (RS-232/485) or Ethernet (10BaseT — on later revs) to SOE workstation / Plant Network
    • Time Synchronization: Accepts IRIG-B (AM or DC) time code input; alternatively NTP client mode
    • Memory: On-board SOE buffer (several thousand events) for temporary storage during network outage
    • Power: 5 V DC + 24 V DC from backplane
    • Indicators: Run, Fault, Com Active, IRIG-BLock LEDs
    • Operating Temp.: 0 °C to +60 °C
    • Mounting: Single slot in IEMMU21 (typically Slot 2 or 3 in a dedicated SOE/data rack)
  • Functional Features:
    • Merges SOE events from multiple racks into single chronological list
    • Time skew correction — compensates for C.W. propagation delay
    • Downloads event list to SOE viewer application on Windows-based plant network
    • Can also serve as gateway for downloading configuration / retrieving module diagnostics
  • Application Scenarios:
    • Power plant disturbance analysis — collect SOE from turbine trip contacts, breaker aux contacts, generator protection relays
    • Refinery incident investigation — sequence of valve position switches, pump trips, Hi-Hi level switches
    • Centralized SOE in multi-unit plant with several INFI 90 node pairs
  • Material & Structure / Working Principle / Installation / Precautions:
    • Install IMHSS03 in designated rack (often a dedicated data-collection rack with C.W. connection to plant nodes)
    • Connect IRIG-B time source (from GPS clock or plant master clock) to rear TB or front BNC as per version
    • Configure in INFI 90 Engineering Workbench — define SOE module list, time source, network parameters
    • Verify IRIG-BLock LED — no lock = SOE timestamps drift
    • Precaution:​ For reliable SOE, ALL SOE-capable modules (IMFEC12 etc.) must be time-synced via the same clock hierarchy — IMHSS03 only correlates, it cannot correct unsynced node clocks; ensure controller node pairs have NTP or IRIG-B discipline

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