Description
The part number IMSET01 refers to a specialized industrial control module manufactured by Bailey Controls (later part of ABB / Elfi / Hartmann & Braun, commonly associated with the Westinghouse, ABB, and Bailey INFI 90 or Harmony distributed control systems).
Product Overview
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Manufacturer: Bailey Controls / ABB
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Part Number / Model: IMSET01 (Alternative part designation: SPSET01)
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Component Type: Sequence of Events (SOE) Time Keeper / Time Synchronization Module
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Platform: INFI 90 / INFI 90 OPEN / Symphony Harmony Distributed Control System (DCS)
Key Specifications & Features
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Core Function: Acts as a time-keeper and time-synchronization module designed to coordinate exact event timestamping across the control system. It ensures that digital state transitions and alarms logged across multiple remote input cards have high-resolution, synchronized time tags.
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Sequence of Events (SOE): Frequently works alongside digital input modules (such as the IMSED01 series) to capture fast-rate discrete status changes with millisecond-level precision during plant trips or sequence transitions.
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Bus Integration: Mounts directly into standard INFI 90 / Harmony rack chassis, communicating system time stamps and synchronization signals over the module backplane and control network (ControlNet / CNet).
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Physical Form Factor: Standard Bailey rack-mounted module utilizing standard card dimensions for backplane slot insertion.
Industrial Deployment
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Applications: Widely deployed in legacy and modernized heavy industrial plants, power generation stations, electrical substations, and continuous process facilities running ABB / Bailey INFI 90 or Symphony Harmony DCS platforms where precise post-incident sequence-of-events analysis is mandatory.
IMSET01
Product Overview
IMSET01 is a Sequence of Events Time Keeper Module (SOE Timing Module) manufactured by ABB Bailey for the INFI 90 / Net 90 Distributed Control System. It works cooperatively with IMSED01 digital input module to implement high-precision sequence-of-event recording.
This module receives global time synchronization signals from INTKM01 clock module, maintains high-resolution local clock, and provides unified time reference for IMSED01 field input boards. It captures state changes of digital signals with millisecond-level time stamps, sorts fault events chronologically. It is critical hardware for power plant turbine protection, generator fault analysis and trip sequence diagnosis.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | IMSET01 |
| Module Type | SOE Time Keeper Module |
| Manufacturer | ABB (Bailey / Elsag Bailey) |
| Applicable Platform | INFI 90 / Net90 DCS Rack |
| Processor | 16-bit processor, 10 MHz |
| Time Resolution | 1 ms |
| Clock Synchronization | Receives time sync signal via RS485 from INTKM01 |
| Supporting Partner Module | IMSED01 (16-channel SOE DI module) |
| Backplane Interface | INFI 90 I/O Expander Bus |
| Termination Unit | NTST01 time sync termination unit |
| Power Supply | +5 VDC, typical 350 mA |
| Mounting Form | Standard plug-in module for INFI90 rack |
| Operating Temperature | 0℃ ~ +60℃ |
| Ambient Humidity | 5%–95% non-condensing |
| Protection Class | IP20 (cabinet installation) |
| Onboard Storage | RAM for event buffer, ROM for firmware |
| Status Indicators | Run, Fault, Communication LED indicators |
| Spare Part Status | OEM production discontinued; new surplus and refurbished boards available |
Key Features
- Provides centralized high-precision time reference for distributed SOE input modules
- 1ms accurate time stamping, enables accurate sorting of fast sequential trip events
- Receives standardized time synchronization signals to unify all SOE boards in the rack
- Cooperates with IMSED01 to collect field digital status changes and upload time-tagged events to controller
- Built-in hardware self-diagnosis function to detect clock failure, bus communication loss and synchronization abnormality
- Standard single-slot mechanical layout compatible with all INFI90 racks
- Industrial anti-surge PCB design, stable operation under strong electromagnetic interference in power plants
- Strict part number matching; cannot be replaced with ordinary DI/AI modules without firmware matching
- Essential spare hardware for power plant INFI90 DCS SOE fault recording system maintenance and retrofit
