ABB N93‑3005‑05 1MRK002311‑AAr11 is a single‑mode 1550 nm optical long‑haul line data communication module designed for harsh environments such as power systems and industrial automation.It belongs to the core communication components of ABB protection and control equipment, including the Relion series protection devices.Using optical fiber as the transmission medium, the module enables high‑speed, long‑distance, and highly interference‑resistant data exchange between protection devices, control systems, and remote I/O units.It addresses key on‑site challenges including strong electromagnetic interference, long transmission distances, and high signal stability requirements.It serves as a critical communication interface unit in power substations, industrial process control, rail transit, and other demanding applications.
Technical Parameters
1. Basic Specifications
- Model Code: N93-3005-05 (Part No. 1MRK002311-AAr11)
- Product Type: Optical Long Range Line Data Communication Module
- Country of Origin: Sweden
- Weight: Net 0.06 kg
- Installation: Fits internal backplane slots of protection devices, no external mounting structure
- Power Supply: Powered by the backplane of the host protection device, no external power supply required
2. Optical & Communication Parameters
- Fiber Type: Single Mode Fiber
- Operating Wavelength: 1550 nm
- Transmission Distance: Up to 20 km repeaterless transmission over single-mode fiber
- Transmission Rate: Supports industrial standard high-speed data rates, meeting real-time requirements of power protocols
- Physical Interface: Dual LC fiber interface (one transmit, one receive)
- Communication Protocols: Compatible with mainstream power/industrial protocols including IEC 60870-5-103, Modbus RTU, SPA bus
3. Environmental & Electrical Parameters
- Operating Temperature: -40℃ ~ +85℃ (wide-temperature industrial grade, suitable for extreme indoor/outdoor applications)
- Operating Humidity: 5% ~ 95% RH (non-condensing)
- Power Consumption: ≤2W (low-power design to reduce host load)
- EMC: Compliant with IEC 6000 series standards, high immunity to electromagnetic interference
- Ingress Protection: IP20 for the module itself (suitable for cabinet installation)
Functions & Advantages
1. Core Functions
- Long‑distance Data TransmissionUsing 1550 nm single‑mode fiber, it enables stable data transmission up to 20 km between devices, replacing traditional long‑distance cable transmission solutions.
- Highly Interference‑Resistant CommunicationFiber transmission provides complete isolation from electromagnetic interference, surges and ground potential differences, making it suitable for high‑interference industrial sites such as substations and steel plants.
- Multi‑Protocol CompatibilitySupports mainstream communication protocols in power and industrial automation, enabling seamless connection with ABB protection devices, PLCs, DCS systems and third‑party equipment.
- Real‑time Data InteractionEnsures millisecond‑level real‑time transmission of protection signals, measurement data and control commands, meeting the real‑time requirements of power protection and process control.
- Fault Diagnosis & Status MonitoringBuilt‑in optical link detection and communication status monitoring support real‑time alarms for fiber breakage, signal attenuation, protocol abnormalities and other faults.
2. Product Advantages
- Industrial‑Grade ReliabilityWide temperature range, low power consumption and high anti‑interference design. MTBF complies with strict power system standards.
- Modular Plug‑and‑PlayFits standard slots of ABB protection devices without extra wiring or power supply, enabling easy installation, replacement and maintenance.
- Signal Isolation ProtectionOptoelectronic isolation design blocks electrical interference between equipment, prevents fault propagation and improves overall system safety.
- Long‑Distance & Low Cost20 km repeaterless transmission over single‑mode fiber reduces repeater deployment and lowers construction and operation costs for long‑distance communication.
- Full‑Scenario AdaptabilityCovers communication needs in power substations, industrial process control, rail transit signaling, water conservancy automation and other fields.
Frequently Asked Questions (FAQ)
Q1: What is the difference between this module and 1MRK002311‑AAr02?A1: Both belong to the LR LDCM optical long‑range communication module series, with identical core functions and optical parameters (1550 nm single‑mode).AAr11 is an upgraded revision of AAr02, mainly optimizing optical signal stability, protocol compatibility, and industrial wide‑temperature adaptability.It is fully compatible in hardware interface, mounting dimensions, and application scenarios, and can be used as a direct replacement.
Q2: Does the module support multimode fiber? What is the maximum transmission distance?A2: Only single‑mode fiber is supported, with a fixed operating wavelength of 1550 nm.Over standard single‑mode fiber, the maximum repeaterless transmission distance is 20 km.Low‑loss single‑mode fiber may allow appropriate extension based on on‑site link attenuation, provided the received optical power remains within the module’s operating range.
Q3: Does the module require an external power supply? How is it installed?A3: No external power supply is needed; it is powered by the internal backplane of the host protection device.Simply insert the module into the corresponding communication slot of the protection device, secure the panel screws, and connect the LC fiber transceiver interfaces.No additional hardware configuration is required. After power‑on, protocol parameters are set via the host software.
Q4: Which communication protocols are supported? Can it connect to third‑party devices?A4: It natively supports mainstream protocols such as IEC 60870‑5‑103 (power protocol), Modbus RTU, and SPA bus.It can connect to third‑party PLCs, DCS systems, and telecontrol devices via protocol conversion.Stable data exchange is achievable as long as the third‑party equipment supports the above protocols.
Q5: How to troubleshoot fiber link failures?A5:
- Check that the LC fiber connectors are securely inserted and the end faces are clean (contamination causes signal attenuation).
- Use an optical power meter to verify transmit and receive power is within the operating range of -30 dBm ~ -10 dBm.
- Check the module status indicators on the host (steady on / blinking / off). For abnormal status, inspect the fiber link for breaks or excessive attenuation.
Q6: What is the operating temperature range of the module?A6: Industrial‑grade wide‑temperature design, with an operating range of -40℃ ~ +85℃.It can adapt to extreme temperature environments such as outdoor cabinets, high‑cold / high‑temperature workshops, and substation outdoor enclosures without additional temperature control.
Q7: Is hot‑swapping supported? Is power interruption required for replacement?A7: Hot‑swapping is not supported.Power off the host protection device before replacing the module to avoid damage to the module or host backplane circuits.Reconnect power after replacement is complete.
Q8: Which product series does this module belong to? Which ABB host devices is it compatible with?A8: It belongs to the ABB Relion® protection and control product series.It is mainly compatible with ABB mainstream protection devices such as the REF54_ series feeder / transformer protection and REL670 series line protection devices.It is also compatible with communication interfaces on some AC800F control systems.
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