Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | ABB RXEDK 2H 1MRK000841-RA |
| Manufacturer | ABB |
| Product Category | Binary I/O Expansion Module (Relion® Series) |
| Compatible Relays | REF615, REF625, RED615, RET615 |
| Input Channels | 8 galvanically isolated digital inputs |
| Output Channels | 5 configurable relay outputs (NO/NC) |
| Contact Rating | 250 VAC/DC, 5A (resistive) / 30W (inductive) |
| Input Voltage Range | 24-250 VDC / 48-230 VAC |
| Isolation Voltage | 4 kV RMS (input-to-output-to-logic) |
| Response Time | ≤3 ms (inputs), ≤6 ms (outputs) |
| Communication Interface | Direct backplane (IEC 60255-1 compliant) |
| Operating Temperature | -40°C to +70°C (cold start @ -40°C) |
| Safety Certification | GOST-R, PUE, IEC 60255, EAC TR CU 020/2011 |
| Hazardous Area Rating | ATEX Zone 2, IECEx Ex nA IIC T4 |
ABB RXEDK 2H 1MRK000841-RA
Product Introduction
The ABB RXEDK 2H 1MRK000841-RA is a specialized binary I/O expansion module engineered for ABB’s Relion® 615 protection relays in Eurasian markets. Designed to meet stringent regional regulations, this variant extends relay capabilities with 8 fault-tolerant digital inputs and 5 high-capacity relay outputs for critical power distribution control. It interfaces with primary equipment like circuit breaker auxiliary contacts, disconnector positions, and lockout relays while ensuring compliance with GOST-R and Eurasian Technical Regulations.
As a key component in Relion® protection schemes, the ABB RXEDK 2H 1MRK000841-RA provides reinforced isolation between field circuits and relay logic. Its ≤6 ms output response enables direct control of trip coils in medium-voltage switchgear, while frost-resistant construction (-40°C cold start) ensures reliability in Arctic substations. The module integrates seamlessly with REF615 relays via plug-in backplane connection, forming the backbone of safety-critical automation in CIS power networks.
Core Advantages and Technical Highlights
Regional Compliance Engineered In: Certified to GOST-R K-2 safety class and EAC TR CU 020/2011 EMC directives, the ABB RXEDK 2H 1MRK000841-RA eliminates customization efforts for CIS projects. Dual-labeled markings satisfy both local inspectors and international clients.
Arctic-Grade Robustness: Validated for continuous operation at -40°C without external heaters. Specialized lubricants prevent contact freezing in Siberian substations. Conformal coating resists condensation during rapid temperature swings.
High-Speed Grid Protection: ≤3 ms input scanning detects breaker status changes within 1/16th power cycle (50Hz). Output relays operate in ≤6 ms – critical for arc flash mitigation in 6-35kV switchgear where total fault clearance must occur in <40 ms.
Reinforced Surge Immunity: Triple-barrier isolation (4kV RMS) with integrated gas-discharge tubes withstands 10 kV lightning surges per IEC 61000-4-5. Input filtering rejects interference from traction substations and electric arc furnaces.
Tool-Free Configuration: Output contacts reprogrammable as NO/NC via PCM600 software without hardware modification. Mechanical latching prevents accidental setting changes during vibration.
Explosion-Protected Design: ATEX Zone 2 certification allows installation in oil/gas switchrooms without additional enclosures. Non-sparking contacts prevent ignition of methane mixtures.
Typical Application Scenarios
Arctic Mining Substations: Monitors shovel disconnect switches at -50°C ambient. Outputs de-energize conveyor belts during ground faults. GOST-K certification mandatory for Russian Arctic projects.
CIS Railway Electrification: Interfaces overhead line disconnectors in traction substations. Withstands 25kV electromagnetic interference from pantograph arcing.
Oil Refinery Switchgear: Executes fast load shedding (≤6 ms) during gas compressor faults. ATEX compliance eliminates explosion-proof conduit requirements.
Hydroelectric Plant Protection: Drives turbine emergency gates during overspeed events. Condensation-resistant design operates in unheated dam galleries.
Eurasian Industrial Parks: Centralized control for multiple REF615-protected feeders. EAC certification simplifies customs clearance across CIS borders.
ABB RXEDK 2H 1MRK000841-RA
Related Model Recommendations
ABB REF615FE4A: GOST-certified feeder protection relay; hosts RXEDK 2H 1MRK000841-RA.
ABB RXECK 2H 1MRK000842-RA: Analog I/O companion module; adds MV voltage/current monitoring.
ABB DOXG 112: High-capacity output module; supplements RXEDK 2H for 10A motorized disconnectors.
ABB REC615: Bay controller; coordinates multiple RXEDK 2H-equipped relays.
ABB CMC 256+: Test set; validates RXEDK 2H timing characteristics per GOST R 51321.5.
ABB ZEF 100.2C: Arc flash sensor; triggers RXEDK 2H outputs within 2 ms.
Installation, Commissioning and Maintenance Instructions
Installation Preparation: Verify relay compatibility (REF615 firmware ≥4.0). Mount vertically per PUE 7th Ed. Clause 3.4. Maintain ≥100 mm clearance from power cables. Use RK-75 certified cables in explosive zones. Ground shield at single point only.
Maintenance Suggestions:
Monthly: Inspect for ice accumulation in sub-zero environments
Quarterly: Measure contact resistance (target <50 mΩ)
Annually: Validate response times with CMC test set
Post-lightning: Check surge counters in PCM600 software
Replace if output contact erosion exceeds 1/3 surface area
Always disconnect test mode jumper after commissioning
Service and Guarantee Commitment
ABB provides 60-month warranty with GOST R ISO 9001-2015 quality certification. Regional support includes:
• 24/7 technical hotline in Russian/English
• Next-day replacement for critical infrastructure
• On-site commissioning by ABB-certified engineers
• Free firmware updates via Asset Suite®
• Calibration traceable to Rosstandart references
• 15-year spare parts guarantee
Compliance documentation includes EAC Declaration of Conformity (EAC RU Д-RU.АБ98.В.20478) and GOST-K safety certificates.
