Description
The 1MRK002246-BE is an ABB Control System Module / Relay Processing Board (also referenced as 1MRK002246-BEr00), belonging to ABB’s 1MRK series of internal function boards for Relion® 670 Series protection and control IEDs — including RED670 (line differential), REL670 (distance protection), REC670 (breaker failure / bay control), and REB670 (busbar protection). It serves as a processing node and/or binary I/O interface between the relay’s main CPU and external secondary circuits, executing signal conditioning, contact supervision, and — in some configurations — auxiliary logic processing. Powered from the IED’s internal 24 V DC backplane, the 1MRK002246-BE is a plug-in printed circuit assembly with gold-finger edge connector, designed for direct slot-in replacement inside the host relay casing without rewiring field terminations.
h2 Application Scenarios
Picture a 400 kV transmission substation where a RED670 line differential relay protects a critical double-circuit tie-line. During a routine firmware audit, the relay logs a “Board Communication Error” on the auxiliary processing slot — traced to a degraded 1MRK002246-BE board. Because the board is a plug-in internal spare, the protection engineer powers down the relay (or follows controlled swap procedure if hot-swap qualified in that bay), removes the faulty card, inserts a new 1MRK002246-BE of matching revision, and restores power. The IED auto-enumerates the board; all binary input wiring to the relay’s terminal block remains untouched. Within minutes the protection scheme is back in service with zero re-termination. This scenario illustrates how the 1MRK002246-BE directly solves the MRO pain point of long lead-time repairs and re-wiring errors — a correctly version-matched spare restores full functionality with a simple board swap, keeping the protection system within NERC / utility compliance windows.
h2 Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1MRK002246-BE (Alt Ref: 1MRK002246-BEr00) |
| Manufacturer | ABB (ABB Power Grids — Relion® Protection & Control / Process Automation) |
| Product Category | Control System Module / Relay Processing & Binary I/O Board |
| Compatible Hosts | ABB Relion 670 Series IEDs — RED670, REL670, REC670, REB670 (verify slot & FW rev) |
| Backplane Supply | 24 V DC (drawn from host IED backplane; no external PSU needed) |
| Binary I/O (typ.) | 8–16 DI / 8–16 DO depending on relay configuration (Monitors breaker pos., alarms; drives trip/close via main BOM) |
| Input Voltage Range | 110–250 V DC (when serving BI function via host terminal block) |
| Output Contact Rating | Up to 5 A @ 30 V DC / 250 V AC (form-A relay contacts on associated BOM — this board processes the logic) |
| Communication | Proprietary backplane bus to IED CPU; may include RS-485 / service port per revision |
| Status Indication | Onboard test points / LEDs (Run, Err — model-dependent) readable via PCM600 |
| Mounting Method | Keyed slot in Relion 670 IED internal I/O frame — plug-in with retaining screw |
| Operating Temperature | -20 °C to +70 °C (substation-grade) |
| Conformal Coating | Yes (standard on Relion spare boards for humidity/condensation resistance) |
h2 Technical Principles and Innovative Values
- Innovation Point 1 — Tight Coupling with Relion 670 CPU via Dedicated Backplane Bus: The 1MRK002246-BE communicates with the main CPU module (e.g. 1MRK002246-BC) over a high-speed parallel/synchronous backplane link, ensuring binary input state changes are time-stamped to 1 ms resolution for Sequence of Events (SOE) recording — critical for post-fault analysis in protection forensics.
- Innovation Point 2 — Revision-Specific Hardware Matching Prevents Silent Misconfiguration: ABB suffixes (-BE, -BC, -BD, etc.) denote not just form factor but firmware-ID and interface pinout. The 1MRK002246-BE is recognized by the IED’s boot ROM; a mismatched revision triggers an explicit “Hardware Incompatible” alarm in PCM600 before the relay goes online — protecting the system from subtle logic or timing anomalies that could arise from indiscriminate part substitution.
- Innovation Point 3 — Integrated Self-Diagnostics & Watchdog Reporting to Host IED: The board continuously performs cyclic CRC checks on its configuration RAM and monitors communication integrity with the CPU. Any anomaly is reported upward as a Board Fail alarm through the IED’s standard diagnostics, which can be exported to the substation SCADA — enabling condition-based spare holding rather than blind periodic replacement.
h2 Application Cases and Industry Value
Case Study — Utility Substation RED670 Bay Retrofit & MRO Standardization:A European TSO operating a fleet of 120+ RED670 bays experienced a single instance of intermittent binary-input drop-out on a 220 kV line bay, root-caused to aging electrolytic components on the 1MRK002246-BE auxiliary board. The utility added the 1MRK002246-BE (Rev R00 matching their relay FW v1.1/1.2) to their approved MRO spare list. When a second bay exhibited similar symptoms 8 months later, the swap was completed in 12 minutes during a scheduled patrol — no re-wiring, no setting download required. Post-swap PCM600 confirmed all self-tests passed. The protection engineer noted that standardizing on the correct -BE revision across all 670 bays “eliminated version-compatibility anxiety” and cut unplanned intervention time by > 80 %. The 1MRK002246-BE proved its value as a true drop-in restore part preserving system availability.
