ABB 1MRK002122-ABR00 LDCM Fiber Optic Communication Board

The ABB 1MRK002122-ABR00 LDCM Fiber Optic Communication Board is a communication module for ABB’s Relion 615 series of numerical protection relays, providing the data communication interface within the protection and control architecture. It is built around fiber-optic data transmission with optoelectronic isolation and a dual-path design that supports link redundancy, keeping protection communication alive even when one path is lost. Designed for medium-voltage distribution protection applications, it suits substations where reliable, interference-immune relay communication matters.

Key Specifications:

• Brand: ABB
• Model: 1MRK002122-ABR00
• Type: Data Communication Module (Relion 615 series)
• System: Relion 615 series protection relays
• Interface: Fiber-optic data transmission
• Design Features: Optoelectronic isolation, dual-path link redundancy
• Application: Medium-voltage distribution protection communication
• Country of Origin: Switzerland

ABB 1MRK002122-ABR00 LDCM Fiber Optic Communication Board is the communication link of a Relion 615 protection IED: it moves protection and monitoring data over fiber optics, using optoelectronic isolation to keep the relay immune to interference from the substation environment. The dual-path design means a failed link automatically falls back to the redundant path, so communication with the station bus continues without interruption.