Application Scenarios
Picture a 400 kV substation where an ABB REG670 line-protection IED suddenly drops off the IEC 61850 station bus while the protection functions themselves continue to operate—a classic symptom of a failed communication board. The relay’s GOOSE subscriptions time out, alarming the SCADA, and the engineer can no longer download settings remotely. Rather than replace the entire IED (which would require reloading the SCL file, re-mapping GOOSE, and scheduling a protection outage), the team sources a version-matched ABB 1MRK001370-DAR01. With the DC supply isolated, the rear cover is removed, the old PCB is extracted from its guide slots, and the new 1MRK001370-DAR01 is seated on the rear-frame connectors. On power-up, the board is auto-recognized; the existing MAC/IP/VLAN configuration stored in the CPU’s non-volatile memory is applied automatically, and GOOSE traffic resumes within seconds. This scenario highlights the 1MRK001370-DAR01‘s strategic value: it is the targeted, low-cost spare that restores full station-communication capability without disturbing the commissioned protection logic.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1MRK001370-DAR01 (DAR01 Revision) |
| Manufacturer | ABB |
| Product Category | System & Communication Interface Module / Rear PCB |
| Compatible Host Devices | ABB REx670 V2.x (REG670, REL670, RET670, REC670) |
| Processing Capacity | 32K steps |
| Memory | Flash 32 KB + RAM 2 KB |
| Supported Protocols | IEC 61850 Ed.1/Ed.2 (GOOSE, MMS), ABB SPA bus, Modbus RTU (RS-485) / Modbus TCP (Ethernet) |
| Ethernet Interfaces | 2 × 100Base-FX (ST or LC fiber) + 1–2 × 10/100Base-TX (RJ-45, model-dependent) |
| Serial/Service Ports | 1 × RS-232/USB service port, 1 × RS-485 (SPA/Modbus RTU) |
| Time Synchronization | IRIG-B (dc), PPS (Pulse Per Second), SNTP via Ethernet |
| Power Consumption | Max. 20 W |
| Operating Temperature | -25 °C to +60 °C |
| Mounting Method | Plug-in mount on rear frame of REx670 bay unit/relay housing |
| Dimensions (approx.) | 96 × 100 × 140 mm (W×H×D) |
| Weight (approx.) | 0.5 kg |
Technical Principles and Innovative Values
Innovation Point 1: Dual-Port Ethernet with IEC 61850 Redundancy
The ABB 1MRK001370-DAR01 supports two independent 100 Mbps Ethernet ports (optical and/or copper) enabling station-bus redundancy (RSTP/PRP/HSR in later firmware). GOOSE multicast frames are hardware-timestamped at the MAC layer, ensuring μs-level precision for breaker-tripping and interlocking messages—far superior to software-stack timestamping.
Innovation Point 2: Multi-Protocol Coexistence on a Single Board
The same board concurrently handles IEC 61850 MMS for SCADA/engineering, GOOSE for peer-to-peer protection signalling, legacy ABB SPA telegrams for backward-compatible bay-level communication, and Modbus for third-party HMI/RTU links. This eliminates the need for external protocol gateways in mixed-vintage substations and simplifies cabling.
Innovation Point 3: Transparent Swap Preserves All Network Settings
All communication parameters (IP, subnet, VLAN ID, GOOSE APPID, SCL configuration reference) are stored in the relay’s main CPU non-volatile memory—not on the ABB 1MRK001370-DAR01. Swapping the board requires no re-entry of network settings; the replacement board is enumerated on the backplane at boot and inherits the existing configuration, minimizing commissioning risk and MTTR.
Innovation Point 4: Protection Logic Offload for Deterministic Performance
By offloading real-time messaging and protocol acceleration from the main protection CPU, the ABB 1MRK001370-DAR01 ensures the relay’s core protection algorithms—such as differential, distance, and overcurrent—operate with deterministic timing independent of communication traffic loads. This architectural separation is critical for maintaining protection reliability in busy substation networks.
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