Product Core Brief
- Model: IMSET01
- Brand: ABB Bailey
- Series: INFI 90 / Symphony / Symphony Harmony
- Core Function: Sequence of Events (SOE) time keeper module that provides high-resolution time-stamping for discrete process events in Bailey DCS systems.
- Product Type: SOE Time Keeper / Sequence of Events Module
- Key Specs: high-resolution event time-stamping | discrete event input channels | INFI 90 / Symphony SOE subsystem
- Condition: New Original / New Surplus (depending on stock)
Key Technical Specifications
- Manufacturer: ABB (Bailey INFI 90 / Symphony product line)
- Part Number:
- Product Type: Sequence of Events (SOE) Time Keeper Module
- System Compatibility: ABB INFI 90, Symphony, Symphony Harmony DCS
- Primary Function: Captures and time-stamps discrete process events for SOE recording and post-event analysis
- Input Channels: discrete event inputs for SOE acquisition
- Input Signal Type: typically 24 VDC / 48 VDC discrete signals, depending on configuration and field wiring
- Power Requirement: +5 VDC from the Bailey MMU backplane
- Typical Application: trip recording, alarm sequencing, breaker/relay event logging, turbine and boiler protection event capture
- Mounting Style: Standard Bailey module for MMU rack installation
- ESD Handling: requires Bailey field static kit during maintenance
- HS Code: 853710 (electrical control panels / assemblies)
Product Introduction (No Fluff)
The ABB IMSET01 is a Sequence of Events time keeper module used in Bailey INFI 90, Symphony, and Symphony Harmony DCS systems. It records the order and timing of discrete process events so engineers can determine exactly which alarm, trip, or protection signal occurred first during a plant upset.
For power plants and process facilities that still rely on legacy Bailey SOE subsystems, this module is often critical during outage troubleshooting. Without a functioning SOE time keeper, event logs may lose resolution or fail to capture the correct sequence, making root-cause analysis unreliable.
QA & Testing SOP (Dynamic & Transparent)
This is an SOE time-stamping module, so testing focuses on event capture accuracy, time synchronization, and channel response.
- Incoming visual inspection: Check the module faceplate, edge connector, terminal area, status LEDs, and PCB for physical damage, corrosion, or prior repair marks.
- Backplane communication test: Seat the module in a known-good Bailey MMU and verify it powers up and registers on the system bus without fault indicators.
- Time synchronization check: Confirm the module receives the correct time reference from the SOE subsystem or associated time-keeping source.
- Event capture test: Apply discrete test pulses to selected SOE input channels and verify that events are recorded with correct time stamps and sequence order.
- ESD-safe handling and packing: Store and ship in anti-static packaging; handle by the module frame and avoid contact with the edge connector.
Installation Pitfalls & Guide (Engineer to Engineer)
❗ Do not treat IMSET01 as a general-purpose digital input module. It is an SOE time keeper. Replacing it with a standard DI card will not restore sequence-of-events recording.
❗ Verify time synchronization before relying on SOE logs. If the module is not synchronized correctly, event timestamps may be inaccurate even though the module appears healthy.
❗ Confirm field wiring polarity and voltage level. SOE inputs typically expect discrete 24/48 VDC signals. Incorrect wiring can prevent event detection or damage the input circuit.
❗ Check the full SOE subsystem, not just the module. IMSET01 often works with related interface modules, terminal boards, and time-reference sources. A fault elsewhere in the SOE chain can look like a module failure.
Replacement steps:
- Pre-install: Document current SOE configuration, record active alarms, and notify operations.
- Removal: Place affected SOE points in a safe state if required, disconnect field wiring, and remove the failed module.
- Install: Seat the new IMSET01, verify retention, reconnect wiring, and confirm correct slot alignment.
- Power-on test: Verify module indicators, confirm time synchronization, and test event capture with controlled input pulses.
Technical FAQ
1. Is the IMSET01 still available? Yes, but it is a legacy Bailey module. Availability depends on inventory condition. We carry new original and new surplus stock.
2. Can I replace IMSET01 with a standard digital input module? No. The IMSET01 is a dedicated SOE time keeper module. A standard digital input card does not provide sequence-of-events time-stamping.
3. Does this module need firmware loading? The IMSET01 operates as part of the Bailey SOE subsystem. It does not require user firmware loading like a controller, but correct configuration and time synchronization must be verified after installation.
4. What happens if the IMSET01 fails? SOE recording may be lost or incomplete. Operators may still see alarms, but engineers will not have reliable high-resolution event sequencing for post-trip analysis.
5. What warranty do you offer? Standard warranty is 12 months unless otherwise stated. For surplus stock, warranty terms are confirmed at quotation.
