Description:The 1MRK000195-AAR02, also referenced by its associated spare number 1MRK000005-63, is an ABB printed circuit board assembly (PCBA) / dual-Ethernet communication expansion module designed for ABB Relion® 650 series protection and control relays—including REF615, REM615, RET615, and REX615 (H-version units with internal expansion slot). It provides two 10/100Base-TX Ethernet ports supporting IEC 61850 Ed.2(MMS & GOOSE), Modbus TCP, and PRP/HSR redundancy options, enabling seamless integration of legacy or newly installed IEDs into modern digital substation and industrial SCADA networks without replacing the entire protection device.h2 Application Scenarios:A regional utility was modernizing a 132/33 kV substation originally equipped with ABB REF615H feeder protection relays that had only a single serial (RS-485) port for SCADA communication. The dispatch center mandated dual-Ethernet IEC 61850GOOSE-based bus differential interlocking and redundant MMS reporting—requirements the base unit could not meet. Rather than replace all six relays, the protection engineer specified the 1MRK000195-AAR02 (1MRK000005-63) expansion board. With the relay powered down and under ESD precautions, the board was inserted into the rear expansion slot of each REF615H; on power-up the host firmware auto-detected the module. Using ABB PCM600 engineering software, dual IP addresses were assigned—Port 1 to the process GOOSE VLAN and Port 2 to the station bus/SCADA VLAN—achieving physical network separation per IEC 61850-90-4. The retrofit took less than one shift per relay, preserved all existing protection settings, and brought the substation into full IEC 61850 compliance at roughly 20 % of the cost of full relay replacement. The project lead commented that the 1MRK000195-AAR02 “bridged the gap between legacy hardware and smart-grid requirements with zero disruption to the protection scheme.”h2
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1MRK000195-AAR02 (Associated Spare / Alt. No.: 1MRK000005-63) |
| Manufacturer | ABB |
| Product Category | Communication Expansion PC Board / Ethernet Interface Card (for Relion 650 Series IEDs) |
| Compatible Host Devices | ABB Relion 650 series with expansion slot — REF615H, REM615H, RET615H, REX615H |
| Ethernet Ports | 2 × 10/100Base-TX RJ45 (Auto MDI/MDIX), individually configurable |
| Supported Protocols | IEC 61850 Ed.2 (MMS, GOOSE), Modbus TCP, optional PRP/HSR (host-firmware dependent) |
| Power Supply | Via host relay backplane (typ. 24 V DC derived from IED auxiliary supply) |
| Power Consumption | < 5 W typical |
| Time Synchronization | SNTP, IRIG-B (passed through / supported by host IED) |
| Physical Form Factor | Plug-in PCB with edge connector & mounting screw/latch — approx. 154 × 80 × 12 mm |
| Operating Temperature | -20 °C to +60 °C (component rated for typical substation environments) |
| EMC Compliance | IEC 61000-4 series (power system relay protection grade) |
| Mounting Method | Internal slot in Relion 650 H-version IED — not DIN-rail mounted |
| Certifications | CE, KEMA-type tested with host IED, IEC 61850 conformance certified |
h2 Technical Principles and Innovative Values:
- Innovation Point 1 — Native Dual-Port Ethernet with IEC 61850Hardware Acceleration. The 1MRK000195-AAR02 integrates a dedicated Ethernet MAC/PHY layer that offloads GOOSE multicast filtering and MMS stack processing from the host IED’s main CPU. This ensures deterministic GOOSE latency (< 4 ms typical) even under heavy SCADA traffic, and allows the relay to simultaneously participate in a process-level GOOSE mesh and a station-level SCADA/MMS network—two physically separated LANs on one module.
- Innovation Point 2 — Automatic Host Recognition & Zero-Configuration Hardware ID. Like other Relion 650 expansion cards, the 1MRK000195-AAR02 carries an onboard EEPROM storing its hardware identity and capability descriptor. When inserted, the host relay’s bootloader reads this ID and dynamically loads the appropriate driver/firmware extension—no DIP switches, no manual addressing. This “plug-recognize-configure” design eliminates commissioning errors and makes the 1MRK000005-63 a true hot-swap-capable spare (in redundant or offline swap scenarios).
- Innovation Point 3 — Substation-Grade EMI Hardening on Compact PCB Form. Despite its small footprint, the board incorporates galvanic isolation on both Ethernet ports (≥ 1.5 kV), carefully routed differential pairs with impedance control, and input filtering compliant with IEC 61000-4-5surge and IEC 61000-4-8magnetic field immunity standards. This allows reliable operation adjacent to CT/VT secondary circuits and close to breaker trip coil switching—environments that would disrupt consumer-grade network interfaces.
h2 Application Cases and Industry Value:Case — Wind Farm 33 kV Collector Feeder Retrofit to IEC 61850: A 50 MW onshore wind farm used REM615 feeder protection on each 33 kV collector feeder, originally communicating via Modbus RTU over RS-485 to the balance-of-plant SCADA. The grid operator required GOOSE-based fast islanding detection and IEC 61850 MMS reporting to the new central wind-farm controller. The O&M team installed the ABB 1MRK000195-AAR02 (1MRK000005-63) in each REM615H relay during a scheduled maintenance outage. Post-retrofit, GOOSE messages for voltage/frequency trip commands propagated across the collector ring in < 10 ms, and all analog/digital point data was available via MMS. The farm’s availability report showed zero communication-related protection delays in the subsequent 12 months. The project saved an estimated €40 k compared to relay replacement and avoided re-certification of protection settings. The site engineer noted the 1MRK000195-AAR02 “did exactly what the datasheet promised—old iron, new brains.”
