Description
ABB 1MRK000005-543 RE_5xx/670 Series PCB
Product Overview
The ABB 1MRK000005-543 is an ABB ordering number associated with the RE_5xx/670 series of numerical protection and control equipment. Available catalog records cross-reference the part to internal board number 1MRK000284-AB, with documented variants including 1MRK000284-ABR01 and 1MRK000284-ABR02. This makes the part different from a conventional standalone PLC I/O module: it should be treated as a replacement circuit-board assembly belonging to an ABB protection-relay hardware architecture.
For procurement and maintenance, the board revision is not a cosmetic detail. Current catalog evidence lists the 1MRK000005-543 against both ABR01 and ABR02 variants, while other sources identify the broader 1MRK000284-AB family inconsistently. One source describes the base AB assembly as a binary-input module, while another catalog classifies ABR02 differently. Those contradictions are exactly why the complete relay type, installed board marking, revision, and system configuration should be checked before substitution.
The ABB 1MRK000005-543 is therefore best specified as an RE_5xx/670-series internal PCB unless the equipment documentation or physical board label confirms the precise functional designation. It belongs to the older ABB protection-hardware ecosystem rather than a current AC 800M or generic S800/S900 I/O platform. That distinction matters when planning a legacy protection-relay repair or maintaining a spare-parts inventory.
Product Introduction
A protection-relay replacement can fail at the purchasing stage before anyone energizes the equipment. Similar ABB ordering numbers may refer to different internal boards, and a board-level revision can determine whether the replacement actually matches the installed hardware.
The 1MRK000005-543 is documented against the 1MRK000284-ABR01/ABR02 family. For a legacy protection system, the safest replacement method is to match the complete board marking and revision—not simply the first ordering number printed on a spare-parts list.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB |
| Primary Ordering Number | 1MRK000005-543 |
| Associated Board Number | 1MRK000284-AB |
| Known Board References | 1MRK000284-ABR01 / 1MRK000284-ABR02 |
| Product Family | ABB RE_5xx / 670 series |
| Product Type | Internal protection-relay PCB / module |
| System Application | Numerical protection and control |
| Installation | Internal relay assembly |
| Firmware | Not independently verified for this board |
| Communication Interface | Not independently verified |
| Supply Voltage | Not independently verified |
| Number of I/O Channels | Not safely established for this exact 1MRK000005-543 configuration |
| Operating Temperature | Not safely established |
| Protection Rating | Not independently established |
| Lifecycle | Legacy / obsolete-family hardware |
Documentation note: Public sources do not provide a sufficiently consistent functional specification for the exact 1MRK000005-543 + 1MRK000284-ABR01/ABR02 combination. Some secondary catalogs describe the broader 1MRK000284-AB family as a binary-input assembly, while other listings classify differently. Those descriptions should not be transferred to the exact board without nameplate or ABB documentation confirmation.
Major Features / Practical Advantages
RE_5xx/670 protection-platform compatibility
The most defensible identification of 1MRK000005-543 is its association with ABB’s RE_5xx/670 protection and control hardware. Multiple current catalog records place the exact ordering number within that equipment family and cross-reference it to 1MRK000284 board variants.
That gives procurement a useful starting point: this is not a generic automation PCB that can be evaluated independently from its host system. The relay model, internal board position, hardware revision, and neighboring modules all matter.
1MRK000005-543
Board-level replacement strategy
The 1MRK000005-543 appears in the market as a PCB/card-level spare, rather than simply as a complete protection relay. This is significant for maintenance teams carrying board-level inventory.
A board replacement should preserve the existing hardware architecture. Before removing the original assembly, record board markings, revision, connectors, jumpers or configuration elements, and the host relay type. For protection equipment, a five-minute identification check is cheaper than discovering a mismatch during commissioning.
Revision-sensitive identification
Available records explicitly associate the same 1MRK000005-543 ordering number with both 1MRK000284-ABR01 and 1MRK000284-.
That means a purchasing department should not automatically treat and as interchangeable merely because the front-level ordering number is identical. If the installed board says 1MRK000284-, request that same revision where practical.
Legacy protection-system support
The RE_5xx/670 family is an older ABB numerical protection platform. Parts of this ecosystem are now treated as obsolete or legacy hardware by secondary technical inventories.
Keeping an identified spare can therefore be useful where an operating substation or industrial electrical system still depends on the original relay architecture. The value of the spare is less about adding new functionality and more about reducing restoration time when a board-level failure occurs.
Avoiding false technical specifications
There is an important engineering advantage to being conservative with this part number.
Some public listings describe the broader 1MRK000284-AB family as a 24-channel optically isolated binary-input module, while other listings assign different functions to .
Those descriptions are not sufficiently consistent to publish a definitive channel count, input voltage, isolation rating, or communication protocol for 1MRK000005-543 itself. For an actual protection-system replacement, that uncertainty should be resolved from the relay documentation or the physical board rather than guessed.
Related Products
- 1MRK000284- — Internal board reference associated with 1MRK000005-543 in current catalog cross-references.
- 1MRK000284- — Another documented board revision associated with 1MRK000005-543. Revision should be checked before substitution.
- 1MRK000284-AB — Base board reference from which the / variants are derived in available catalogs.
- 1MRK000005-380 — Different ABB ordering number associated with a binary-output-module board; it should not be treated as a substitute for 1MRK000005-543.
- 1MRK000005-396 — Another RE_5xx/670-series board/configuration ordering number. Functional equivalence should not be assumed.
- 1MRK000005-520 — RE_5xx/670-series ordering number associated with a different internal board reference.
- 1MRK000005-407 — Another RE_5xx/670-series ordering number, associated in catalog records with 1MRK000284-ABR00.
- 1MRK000007-35 / 670NUM02 — Numerical/CPU processing module used in ABB RE_670 protection equipment; functionally different from the 1MRK000005-543 board.
- 1MRK002246-BC — CPU/power-supply board associated with RED670 equipment; not a direct substitute for 1MRK000005-543.
FAQ
What is ABB 1MRK000005-543?
It is an ABB ordering number associated with the RE_5xx/670 series protection and control platform. Available catalog records cross-reference it to internal board 1MRK000284-AB, including and variants.
Is 1MRK000005-543 a complete protection relay?
Not based on the available identification evidence. It is better treated as a board-level/internal hardware spare associated with the RE_5xx/670 relay family rather than a complete numerical protection relay.
Is 1MRK000005-543 the same as 1MRK000284-?
The available catalog evidence associates them, but the two numbers serve different identification purposes: 1MRK000005-543 is the ABB ordering number, while 1MRK000284- is the associated internal board/revision reference.
Can I hot-swap this board?
Do not assume that it can be hot-swapped. This is internal protection-relay hardware, not a plug-and-play PLC I/O card with a universally specified online-replacement procedure. Follow the host relay’s maintenance instructions and the site’s protection-isolation procedure.
Does 1MRK000005-543 support firmware v3.1?
No reliable public documentation reviewed establishes a firmware version specifically for this board. Firmware compatibility should be checked at the complete RE_5xx/670 relay level rather than assigning a firmware number to the PCB from the part number alone.
Is 1MRK000284- interchangeable with ?
Do not assume it. Both revisions are publicly associated with 1MRK000005-543, but the available documentation does not establish complete electrical and functional equivalence between and . Match the installed board revision whenever possible.
Can I identify the board from 1MRK000005-543 alone?
For procurement, it is safer to use the part number as the starting point, not the entire identification. Record the 1MRK000005-543 ordering number together with the internal 1MRK000284-ABRxx marking, hardware revision, host relay model and board position.
Is a New Surplus 1MRK000005-543 equivalent to a tested used board?
Not necessarily. New Surplus indicates stock condition, not successful operation in a particular RE_5xx/670 relay. For a protection application, a tested board with documented functional verification may provide more useful evidence than an untested board simply labeled New Surplus.
Procurement Note
The procurement risk with ABB 1MRK000005-543 is misidentification, not a lack of nominal specifications.
Available evidence establishes the relationship between 1MRK000005-543 and the 1MRK000284- / board references, but public sources do not provide a sufficiently consistent technical description to safely publish voltage, channel count, isolation, or communication specifications for the exact configuration.
Before approving a replacement, obtain a clear photograph of the original PCB label and verify:
1MRK000005-543 → 1MRK000284-ABRxx revision → host relay model → board position → connector arrangement → hardware revision → configuration documentation.
Do not substitute a board merely because its ABB part number begins with 1MRK000284. The RE_5xx/670 platform contains numerous internal boards with similar numbering, including binary I/O, processing, communication and power-related assemblies.
For critical protection service, the purchase specification should explicitly state the complete ordering number and the ABR revision shown on the physical board. That is the most defensible way to control compatibility when dealing with this legacy ABB hardware.
