ABB 1MRK002266-AAr03 Relion 670 Optical Ethernet Module

ABB 1MRK002266-AAr03 Relion 670 Optical Ethernet Module

The ABB 1MRK002266-AAr03 is an Optical Ethernet Module designed for ABB Relion 670 series protection and control systems, including the REL670 protection relay platform. Installed inside the protection relay assembly, it provides optical fiber communication interfaces for substation automation networks, remote monitoring, and supervisory control and data acquisition (SCADA) integration.

Technical Specifications

Substation Network Integration and Ordering Notes

Within an ABB Relion 670 protection relay chassis, the 1MRK002266-AAr03 handles Ethernet-based station bus and substation automation traffic over optical fiber. Using optical fiber provides galvanic isolation between the protection IED and station network switches while preventing electromagnetic interference in high-voltage switchyard environments.

When ordering a replacement board, verify the complete ABB part number 1MRK002266-AAr03, including both the -AA variant code and the r03 revision suffix. Adjacent revisions in the 1MRK002266-AA family may differ in optical transceiver hardware or relay firmware compatibility.

Frequently Asked Questions

Q: What is the ABB 1MRK002266-AAr03 used for? A: It is an Optical Ethernet Module for ABB Relion 670 series protection relays (such as the REL670) that provides fiber-optic Ethernet connectivity for substation automation and SCADA communication.

Q: Is the ABB 1MRK002266-AAr03 a binary input/output module? A: No. Although some secondary reseller listings mislabel this part number as a binary I/O module, ABB product records identify 1MRK002266-AAr03 as an Optical Ethernet communication interface module for Relion 670 protection systems.