Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | 1MRS050644 |
| Manufacturer | ABB |
| Product Category | Communication Module (REX521 Protection Relay) |
| Supported Protocols | IEC 61850-8-1, Modbus TCP, DNP3.0 |
| Ethernet Ports | 2× 100BASE-FX (ST connector) |
| Fiber Type | Multimode 62.5/125 μm |
| Transmission Distance | 2 km |
| Redundancy Support | PRP/HSR (Parallel Redundancy Protocol) |
| Configuration Interface | USB Type-B |
| Operating Temperature | -40°C to +85°C |
| Safety Certification | IEC 60255, IEEE 1613 |
| Power Consumption | 1.5 W (typical) |
| MTBF | > 300,000 hours |
ABB 1MRS050644
Product Introduction
The ABB 1MRS050644 is a high-reliability fiber-optic communication module designed for ABB’s REX521 line of protection relays, enabling secure data exchange in critical power infrastructure. This advanced interface module facilitates real-time grid monitoring and control through IEC 61850-compliant communication, serving as the digital nervous system for modern substations. The 1MRS050644 transforms REX521 relays into intelligent nodes within ABB’s System 800xA or third-party SCADA networks, supporting seamless integration of protection data with grid management systems.
Engineered for harsh electrical environments, this module provides galvanic isolation between relay logic and communication networks, eliminating ground loop interference. Its dual-fiber architecture ensures continuous data flow even during single-path failures, maintaining grid visibility during fault conditions. The ABB 1MRS050644 plays a pivotal role in digital substation architectures, enabling features like remote relay configuration, disturbance recorder retrieval, and automated sequence-of-event reporting.
Core Advantages and Technical Highlights
Grid-Grade Resilience:
Featuring hardware-level PRP/HSR redundancy support, the ABB 1MRS050644 achieves zero-packet-loss communication during network reconfiguration. Dual independent media access controllers (MACs) prevent single-point failures in mission-critical protection schemes.
Cybersecurity Integration:
Implements MACsec (IEEE 802.1AE) encryption for IEC 61850 GOOSE/SV messages. Secure boot with signed firmware prevents unauthorized modifications, while role-based access control aligns with IEC 62351 standards.
Time-Sensitive Networking:
Precision Time Protocol (PTP IEEE 1588v2) synchronization maintains ±1μs accuracy across the protection system, essential for fault location and disturbance analysis. Hardware time-stamping ensures reliable sequence-of-event recording.
Extreme Environment Operation:
Industrial-grade components withstand -40°C cold starts and 85°C ambient temperatures. Corrosion-resistant ST connectors maintain >40 dB optical margin after 500 mating cycles in humid environments.
Typical Application Scenarios
In digital substations, the ABB 1MRS050644 enables IEC 61850-9-2LE sampled value streaming from merging units to REX521 relays, replacing copper wiring with fiber-optic networks. This eliminates CT saturation risks during faults while enabling centralized protection coordination.
For wind farm collector systems, the module establishes redundant fiber rings between turbine protection relays, using GOOSE messaging for rapid (<4ms) busbar fault isolation. Its PRP capability prevents communication loss during switchgear operations. In industrial power plants, the 1MRS050644 integrates motor protection relays into DCS systems, streaming real-time thermal overload data via Modbus TCP while maintaining SIL 3 safety integrity.
Related Model Recommendations
REX521 Protection Relay: Host device for 1MRS050644
1MRS050643 Copper Ethernet Module: Alternative RJ45 interface
COM600 Gateway: Centralized substation communication
FSOF-12 Fiber Optic Switch: Network infrastructure
REC650 Controller: Complementary bay control unit
SD522 Power Supply: 24V DC source for relay cabinets
TA24 Fiber Management Kit: Cable organization
ABB 1MRS050644
Installation, Commissioning and Maintenance Instructions
Installation Preparation:
Verify fiber continuity (≤2dB loss) before connection. Clean ST connectors with lint-free swabs and isopropyl alcohol. Maintain minimum 50mm bend radius for fibers. Ground shield drain wires at single points only.
Maintenance Recommendations:
Bi-annual: Measure optical power budget (Tx ≥ -20 dBm, Rx ≤ -30 dBm)
Annual: Clean fiber ports with approved cleaning kit
Monitor PRP/HSR status LEDs: Steady green = active redundancy
Firmware Updates: Always validate digital signatures via PCM600 software
Critical: Replace if CRC error rate exceeds 10⁻⁶ in diagnostic logs
Service and Guarantee Commitment
ABB provides a 60-month warranty for 1MRS050644, covering optical component degradation. Global substation support includes:
24/7 cybersecurity incident response
Lifetime firmware updates until 2040
Advanced replacement for critical failures
Complimentary access to ABB Ability™ Asset Health Center
On-site commissioning support
All modules undergo:
168h accelerated thermal cycling (-40°C ↔ +85°C)
100% optical power budget verification
IEC 61000-4-4 EFT immunity testing
PRP/HSR conformance validation per IEC 62439-3
Extended service contracts include cybersecurity audits and firmware management.
