Original ABB 93‑3004‑04 1MRK002122‑ABR12 LDCM fiber communication module for Relion protection relays, substation line differential protection spare part.

Product Overview

93‑3004‑04 1MRK002122‑ABR12 is LDCM optical line data communication plug‑in module for ABB Relion series protection and control IED. It adopts dual ST fiber interface, dedicated for line differential protection signal transmission between protection relays. It provides complete galvanic isolation to suppress strong electromagnetic interference in high‑voltage substation environment, supports GOOSE and differential protection message interaction. Widely used as maintenance spare part for power plant and substation relay‑protection systems.

Key Features

• Dual ST fiber ports for point‑to‑point line differential protection communication
• High‑isolation design, isolates optical channel from relay internal logic circuit
• Excellent anti‑EMI performance, stable operation under harsh substation electromagnetic environment
• Slot plug‑in installation inside Relion protection IED, convenient for on‑site replacement
• Supports GOOSE fast protection message and line differential protection data transmission
• Front‑panel LED indicators for communication link status and fault diagnosis

• Complies with IEC substation EMC and environmental adaptability standards

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Technical Specifications

• Brand: ABB
• Model: 93‑3004‑04, 1MRK002122‑ABR12
• Module Type: LDCM Optical Communication Module
• Connector: ST type fiber interface
• Power Supply: Powered by relay internal backplane bus
• Isolation Voltage: 1500V RMS dielectric isolation
• Operating Temp: ‑20℃ ~ +60℃
• Storage Temp: ‑40℃ ~ +85℃
• Humidity: 5‑95% non‑condensing

• Installation: Internal slot plug‑in for protection relay

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Compatibility

Suitable for ABB Relion REF615, REF620, REG670 series protection IED devices. Must work in pairs with matching LDCM modules, communication parameter configuration is required after replacement.