Description
Product overview
The ABB 1MRK002122-ABR02 requires exact part-number verification before a definitive product specification can be assigned. ABB’s Relion 670-series communication documentation lists the closely matching 1MRK002122-AB as an optical short-range line data communication module. This type of interface carries communication signals over fiber-optic links between compatible protection devices or communication endpoints. It is not a general-purpose PLC digital I/O module, despite some supplier pages categorizing similar numbers that way.
For the documented 1MRK002122-AB interface, ABB specifies multimode optical fiber at 850 nm, with support for 50/125 µm and 62.5/125 µm glass fiber. The communication manual provides optical-budget data for these configurations, including different transmitter output levels and a receiver sensitivity of -30 dBm. These values apply to the documented AB module and should not automatically be assigned to the supplied ABR02 designation until the suffix and hardware identity are confirmed.
When sourcing a replacement, compare the complete label, connector type, optical fiber specification, host relay model, and installed communication configuration. Also confirm whether the requirement is for a short-range optical link or a different line data communication option. For surplus or refurbished stock, request photographs of the actual module and test evidence covering optical transmission and reception where possible. A generic power-on check does not establish a working fiber link or compatibility with the installed protection scheme.
Product introduction
Optical communication modules in protection systems must match the installed relay configuration and fiber interface. The closest documented match for 1MRK002122-ABR02 is ABB’s 1MRK002122-AB short-range optical communication module, but the exact suffix remains unresolved.
Before ordering, verify the original module label and optical connector arrangement. This avoids confusing a communication interface with an unrelated I/O or relay-output component.
Key technical specifications
| Parameter | Details |
|---|---|
| Manufacturer | ABB |
| Supplied model | 1MRK002122-ABR02 |
| Closely matching documented code | 1MRK002122-AB |
| Product type | Optical short-range communication module for the documented AB code |
| System association | ABB Relion 670-series communication options |
| Communication medium | Optical fiber |
| Wavelength | 850 nm for the documented AB module |
| Fiber type | Multimode glass fiber |
| Supported fiber sizes | 50/125 µm and 62.5/125 µm |
| Optical connector | ST for the documented AB module |
| Optical budget | 9 dB for 50/125 µm; 13 dB for 62.5/125 µm in the cited manual |
| Minimum receiver sensitivity | -30 dBm for the documented AB module |
| Communication protocol | Depends on the specific communication application; verify from the system design |
| Power requirements | Verify from the applicable module documentation |
| Mounting | Confirm against the host relay configuration |
| Operating temperature | Not verified for the exact ABR02 designation |
| Protection rating | Not verified |
| Product condition | Confirm with supplier |
| Replacement compatibility | Exact suffix and hardware identity must be confirmed |
Specification warning: The optical values above refer to ABB documentation for 1MRK002122-AB, not independently verified specifications for 1MRK002122-ABR02. Do not use them for acceptance testing until the actual part number is confirmed.
1MRK002122-ABR02
Related products
| Model / reference | Relationship |
|---|---|
| 1MRK002122-AB | Documented ABB optical short-range line data communication module; closest identified match |
| 1MRK002311-AA | Different optical communication option listed in Relion 670 documentation |
| 1MRK002311-BA | Different optical communication option listed in Relion 670 documentation |
| 1MRK002266-EA | Another communication option in the Relion 670 ordering information |
These are communication-option references, not confirmed direct substitutes for the supplied designation.
Frequently asked questions
1. What is ABB 1MRK002122- used for?
The exact code could not be verified. The closely matching 1MRK002122-AB is documented as an optical short-range line data communication module for ABB protection equipment.
2. Is 1MRK002122- the same as 1MRK002122-AB?
That equivalence is not confirmed. Compare the original nameplate and obtain an approved cross-reference before ordering a replacement.
3. What fiber type does the documented 1MRK002122-AB use?
ABB documentation lists multimode glass fiber in 50/125 µm and 62.5/125 µm formats, with an 850 nm optical wavelength.
4. Is this a binary output or digital I/O module?
The ABB communication manual identifies the closely matching 1MRK002122-AB as an optical communication module. Generic supplier listings describing similar codes as binary I/O should not override the applicable ABB documentation.
5. Can it be installed in any ABB Relion relay?
No. Confirm the relay model, available communication-module position, firmware or configuration requirements, and the approved ordering code.
6. What should be tested on a used module?
Inspect the optical connector and housing, confirm the hardware label, and request functional testing of optical transmission and reception. Where feasible, verify link operation with compatible equipment.
7. What information is needed to confirm the exact product?
A clear photograph of the complete label showing the order code and revision, plus the host relay model and optical connector arrangement, would help resolve the suffix discrepancy.
Procurement recommendation
Treat 1MRK002122- as an unconfirmed part-number variant until its relationship to ABB 1MRK002122-AB is established. Confirm the complete designation, relay compatibility, and optical interface before purchasing. For critical protection applications, require documented functional testing rather than relying on a generic product description or an unverified cross-reference.
