1MRK002311-AA ABB Communication Module new brand

• Brand
  ABB
• Model
  1MRK002311-AA
• Product Name
  Optical Medium‑Range Line Data Communication Module
• Dimensions
  180 mm × 120 mm × 40 mm
• Weight
  0.76 kg
• Place of Origin
  Sweden
• HS Code
  85389000
• Operating Temperature
  -40 °C to +70 °C
• Storage Temperature
  -140 °C to +98°C
• Power Supply
  module draw <2 W
• Warranty
  1 year
• Status
  new

1MRK002311-AA ABB

Auxiliary supply (power input): 80-250V AC/DC, wide range mixed alternating-direct current power supply for module operation.

Current transformer input (analog measuring input): 1A /5A rated secondary current input, for protection relay current measurement.

Voltage transformer input (analog measuring input): 100-120V AC rated secondary voltage input, for protection relay voltage measurement.

Signal output: Optical fiber digital output only, electrical analog voltage/current signals are not available for external direct output; converted digital protection data is transmitted via single-mode optical interface.

Power consumption: Max 12W under full operating condition.

Input summary:

Power input: 80-250V AC/DC auxiliary supply

Analog measuring current input: 1A or 5A CT secondary

Analog measuring voltage input: 100-120V AC VT secondary

Output summary:

Communication output: Single-mode fiber optic digital signal, no analog electrical voltage or current output terminals for field connection.

ABB 1MRK002311-AA Troubleshooting Steps

Safety note: Perform high-voltage measurement strictly follow site safety rules; disconnect CT/PT secondary before module wiring work to avoid open-circuit high-voltage hazard.

Step1 Visual & mechanical inspection

Check module LED indicator status, record red/alarm flashing pattern.

Inspect module surface for burn marks, overheating, dust, corrosion.

Check back-plane slot: module fully locked, no loose, bent or dirty pins.

Verify cabinet ambient temperature within operating range, good ventilation.

Step2 Auxiliary power supply check (Power Input)

Measure auxiliary supply terminals: actual value shall be 80-250V AC/DC.

Confirm no large voltage fluctuation, no intermittent power drop.

Check power terminal tightness, loose wiring causes intermittent fault.

Power-cycle module: power off for 3-5 minutes, re-power, observe if alarm disappears.

Step3 Analog measuring input check (CT / VT secondary)

Current input (1A /5A CT secondary)

Power off relevant circuit; check CT secondary wiring terminal tightness, no open-circuit.

Measure secondary loop resistance, exclude broken wire / loose connection.

Inject standard secondary current (1A or 5A) via relay test set, verify module receives correct measured value.

Check for CT secondary short-circuit or ground fault from external cable.

Voltage input (100-120V AC VT secondary)

Measure VT secondary input voltage at module terminals, nominal 100-120V AC.

Check VT secondary no open-circuit, no phase loss, no ground fault.

Use test set to inject rated AC voltage, confirm module sampling value matches input.

Step4 Fiber-optic digital output troubleshooting

This module has no analog voltage/current electrical output, only single-mode optical fiber digital output.

Inspect fiber connector: no dust, scratch, dirt; clean fiber end face with alcohol swab.

Check fiber cable for sharp bend, crush damage; minimum bending radius follow specification.

Swap known good fiber cable for cross-validation, distinguish module fault vs fiber fault.

Check opposite-side optical device power & communication status, confirm receiving-end normal.

Step5 Module internal diagnostic & firmware

Access upper IED diagnostic menu, read internal event log, hardware error records, supervision alarms.

Check firmware compatibility between this module and main CPU unit; mismatch causes communication abort.

If many abnormal events persist after power-reset: re-download correct configuration parameter.

Step6 Isolation test (Distinguish external wiring fault or module hardware fault)

Disconnect all external wiring: auxiliary power, CT/VT input, fiber link.

Only connect qualified stable auxiliary power supply to module.

If alarm still exists with all external signals removed → suspected module hardware damage, contact ABB support for repair or replacement.

If alarm disappears after disconnection → fault comes from external circuit (wiring, CT/VT, fiber, interference).

Common typical fault checklist

No LED / module dead: auxiliary supply out-of-range, bad back-plane contact.

Measurement value abnormal / offset: CT/VT wiring loose, wrong rated setting(1A/5A), external interference.

Optical communication loss: fiber dirty, bend damage, opposite device failure, firmware mismatch.

Intermittent random alarm: loose terminals, cabinet over-temperature, strong electromagnetic interference.

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