Description
Product Overview
ABB 1MRK002122-ABR12 is an Optical Short Range Line Data Communication Module (LDCM-SR) designed for ABB Relion® protection and control platforms. It is a specialized optical communication interface used in intelligent electronic devices (IEDs) to provide fast, reliable, and interference-resistant data exchange for electrical protection applications. The 1MRK002122-ABR12 belongs to ABB’s LDCM communication module family, which is widely used in line differential protection, remote protection communication, and substation automation systems.
ABB 1MRK002122-ABR12 provides a short-range optical communication channel for transferring protection-related information between compatible ABB protection devices. The module is based on optical transmission technology, allowing communication between relay terminals without the limitations of conventional copper wiring. The optical design of 1MRK002122-ABR12 ensures excellent immunity against electromagnetic interference, switching disturbances, and ground potential differences commonly found in substations and industrial power environments.
ABB 1MRK002122-ABR12 is primarily applied in ABB Relion® 670 series protection devices, including line protection and differential protection solutions. By providing a reliable communication path between protection terminals, 1MRK002122-ABR12 helps achieve faster fault detection, selective tripping, and improved power system stability. Its modular design simplifies integration, maintenance, and lifecycle management for modern digital substations and industrial electrical networks.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 1MRK002122-ABR12 |
| Manufacturer | ABB |
| Product Type | Optical Short Range Line Data Communication Module (LDCM-SR) |
| Product Family | ABB Relion® Protection and Control Systems |
| Communication Function | Line differential protection data communication |
| Communication Medium | Optical fiber communication |
| Optical Wavelength | 820 nm |
| Fiber Type | Multimode optical fiber |
| Communication Distance | Short range, typically up to several kilometers depending on fiber type |
| Optical Interface | Fiber optic transmitter/receiver interface |
| Communication Protocol | ABB protection communication protocol / IEEE C37.94 compatible applications |
| Data Transmission Rate | 64 kbps (standard LDCM mode, configuration dependent) |
| Compatible Systems | ABB RED670, REL670, RET670 and related IED platforms |
| Installation Type | Internal relay module installation |
| Power Supply | Supplied by host ABB protection device |
| Operating Temperature | Approx. -25°C to +70°C |
| Protection Class | IP20 (installed inside relay enclosure) |
| EMC Performance | High immunity to electromagnetic interference |
1MRK002122-ABR05
Main Features and Advantages
ABB 1MRK002122-ABR12 provides a high-reliability communication solution specifically developed for power system protection applications. Unlike ordinary industrial communication modules, 1MRK002122-ABR12 is optimized for protection-grade communication where transmission stability, synchronization accuracy, and low latency are essential for correct fault clearing.
The main advantage of ABB 1MRK002122-ABR12 is its optical communication capability. Fiber-optic transmission provides complete electrical isolation between protection devices and eliminates many problems associated with copper communication, including electromagnetic interference, induced voltage, and ground loop effects. This makes 1MRK002122-ABR12 highly suitable for high-voltage substations and industrial electrical installations with severe electrical noise conditions.
ABB 1MRK002122-ABR12 supports reliable exchange of protection information between intelligent electronic devices. In line differential protection applications, protection relays installed at different locations must continuously exchange measurement and status information. Stable communication through 1MRK002122-ABR12 ensures that protection algorithms receive accurate data for fast and selective fault analysis.
The compact modular design of 1MRK002122-ABR12 allows straightforward integration into ABB Relion® protection equipment. Engineers can install the module within compatible relay configurations, reducing engineering effort and improving system maintainability.
ABB 1MRK002122-ABR12 also offers strong environmental adaptability. Electrical substations are exposed to temperature fluctuations, switching operations, vibration, and electromagnetic disturbances. The optical communication architecture helps maintain stable operation under these challenging conditions.
Another benefit of ABB 1MRK002122-ABR12 is its suitability for system upgrades and replacement projects. Existing ABB protection installations can be maintained or expanded by replacing communication modules while keeping the existing relay architecture.
The module improves overall protection system availability by providing a dependable communication link between protection terminals. Combined with ABB Relion® protection devices, 1MRK002122-ABR12 helps utilities and industrial users achieve safer, faster, and more reliable power system operation.
Applications
ABB 1MRK002122-ABR12 is mainly used in electrical protection systems requiring secure and fast communication between ABB intelligent electronic devices. Its primary application is in line differential protection systems where communication reliability directly affects protection performance.
In transmission and distribution substations, ABB 1MRK002122-ABR12 provides optical communication between protection relays installed at different points of the electrical network. The module enables exchange of differential protection information, allowing protection devices to accurately identify internal faults and issue selective trip commands.
Power generation facilities use 1MRK002122-ABR12 in generator protection and electrical automation systems. Reliable communication between protection devices helps maintain generator availability and improves response during abnormal operating conditions.
Industrial electrical networks, including petrochemical plants, mining facilities, steel production plants, and large manufacturing sites, use ABB 1MRK002122-ABR12 for dependable protection communication in switchgear and distribution systems.
The module is also suitable for substation modernization projects. When expanding existing ABB protection systems, 1MRK002122-ABR12 provides improved communication capability while maintaining compatibility with established ABB protection architectures.
Typical application areas include:
- High-voltage transmission substations
- Medium-voltage protection systems
- Line differential protection
- ABB RED670 protection systems
- ABB REL670 protection systems
- Generator protection applications
- Industrial power distribution
- Digital substation automation
- Power grid modernization projects
Related Products
ABB 1MRK002122-ABR00 — Optical short-range LDCM module variant for ABB Relion® protection systems.
ABB 1MRK002122-ABR01 — Related LDCM communication module variant with different ordering configuration.
ABB 1MRK002122-ABR03 — Optical short-range communication module variant used in ABB protection applications.
ABB 1MRK002122-ABR05 — Alternative LDCM-SR module version for ABB protection communication systems.
ABB 1MRK002311-AAR02 — Optical long-range LDCM module using 1550 nm single-mode fiber communication.
ABB 1MRK002311-AAR11 — Long-range optical communication module for extended-distance protection applications.
ABB RED670 — Line differential protection relay platform supporting LDCM modules.
ABB REL670 — Transmission line protection relay compatible with ABB optical communication modules.
ABB RET670 — Transformer protection relay platform within the Relion® 670 family.
