ABB 93-3004-04 1MRK002122-ABr12 is a high-performance optical fiber communication module designed for industrial automation and power control systems (part of the ABB 1MRK002122 series).It is mainly used to achieve high-speed, highly reliable optical signal transmission and isolated communication between the control layer and field I/O and remote devices.
This module integrates optoelectronic conversion, signal conditioning, electrical isolation, protocol adaptation and other functions, which can completely eliminate electromagnetic interference, ground potential difference, surges and other problems in industrial sites, ensuring the stability of data links in long-distance and high-interference environments.It is widely compatible with ABB Symphony, RTU500, substation automation, DCS and various industrial PLC control systems, serving as a core communication component for realizing system distributed architecture and remote expansion.
Technical Parameters
Model Identification
Part No.: 93-3004-04Order No.: 1MRK002122-ABr12Series: 1MRK002122 Optical Communication Module Series (LDCM, Line Data Communication Module)
Communication Specifications
Fiber Type: Multimode fiber (50/125μm or 62.5/125μm)Transmission Wavelength: 850 nmTransmission Rate: 2 Mbps~10 Mbps (adaptive industrial bus rate)Maximum Transmission Distance: 2 km (standard multimode fiber)Optical Link Budget: 9 dB (including margin for fiber, connector and splicing loss)Fiber Interface: Dual LC (or dual ST, depending on version) fiber connectors
Electrical & Interface
Board Power Supply: 5V DC (backplane-powered, power consumption ≤5W)Electrical Isolation: 2.5 kV optoelectronic isolation (between channels, channels and system)Compatible Buses: Compatible with ABB dedicated internal bus, PROFIBUS DP, Modbus RTU and other industrial protocolsPhysical Form: Standard 6U Eurocard, suitable for rack mounting in ABB systems
Environmental & Reliability
Operating Temperature: -40℃ ~ +85℃Storage Temperature: -55℃ ~ +125℃Relative Humidity: 5%~95% (non-condensing)Immunity: Compliant with IEC 61000-6-2/4 industrial EMC standardsMTBF: ≥ 1,000,000 hoursWeight: Approx. 0.2 kg
Main Functions & Features
Fully Isolated Optoelectronic Conversion
Performs bidirectional conversion between electrical and optical signals. 2.5 kV electrical isolation completely eliminates ground loops, high-voltage crosstalk and surges, protecting controllers and field devices.
Interference-Resistant Long-Distance Transmission
Fiber transmission is immune to electromagnetic interference (EMI/RFI), maintaining signal integrity over long distances up to 2 km, suitable for cross-regional communication in substations and factories.
Multi-Protocol Compatibility
Built-in protocol processing chip enables seamless connection to ABB Symphony and other systems, while supporting mainstream industrial buses and compatible with upgrades of new and old control systems.
Hot-Swappable & High Reliability
Supports hot-plugging (system-dependent), with long trouble-free service life. Industrial-grade wide-temperature design adapts to extreme working conditions.
Status Diagnosis & Monitoring
On-board LED indicators (PWR, TX, RX, FAULT) display power, transmit/receive and fault status in real time; supports system-level diagnostic reporting.
Plug-and-Play Integration
Standard board dimensions and backplane interface allow direct insertion into ABB control racks without extra wiring, featuring simple configuration and easy maintenance.
Application Scenarios
- Power Industry: Substation automation, SIS safety instrumented systems, telecontrol communication, RTU remote terminal units
- Industrial Control: DCS distributed control systems, PLC remote I/O expansion, cross-workshop equipment interconnection
- Infrastructure: Water treatment, metallurgy, petrochemical, rail transit and other scenarios with strong interference and long-distance communication
- System Upgrade: Replace traditional electrical communication modules to overcome interference and distance bottlenecks and improve system stability
Frequently Asked Questions (FAQ)
Q1: What is the difference between 1MRK002122-ABr12 and ABr00/02/03 in the same series?A: The core differences lie in transmission distance, wavelength and fiber type:
- ABr00: 1550 nm single-mode, long-distance (≥10 km)
- ABr02/03/12: 850 nm multimode, short/medium distance (≤2 km)ABr12 is an upgraded version of ABr02/03 with optimized speed and compatibility. It has the same hardware interface and can be directly replaced.
Q2: Does the module support single-mode fiber? What is the maximum distance?A: 1MRK002122-ABr12 only supports multimode fiber (850 nm) with a maximum distance of 2 km. For single-mode long-distance applications, ABr00 (1550 nm single-mode, up to 20 km+) is required.
Q3: No signal at the optical port after connection (TX/RX lights off). How to troubleshoot?A: Troubleshoot according to the following steps:
- Check the fiber: confirm multimode fiber, clean end faces, and cross connection of transceiver ends (TX↔RX)
- Check power: measure received optical power with an optical power meter, which should be ≥ -30 dBm (low power indicates excessive fiber loss)
- Check configuration: confirm module address and bus rate match the system
- Hardware self-test: reinsert the module and check backplane power supply and slot contact
Q4: Does the module support hot swapping? Will it damage the system?A: Hot swapping is supported (subject to system compatibility). The module has built-in overcurrent, overvoltage protection and slow-start circuits. Hot swapping will not damage the module or the system. It is recommended to confirm the system is in maintenance-allowed status before operation.
Q5: Can it replace optical communication modules of other brands?A: It is only compatible with ABB 1MRK002122 series hardware and system bus. Due to dedicated interface, protocol and electrical specifications, it cannot directly replace third-party modules such as Siemens and Schneider, and must be used with ABB control systems.
Q6: What is the maximum transmission rate? Will it affect system real-time performance?A: The maximum rate is 10 Mbps, which adaptively matches the system bus rate. The optical transmission delay is < 10 μs, meeting the real-time requirements of industrial control, power protection and other applications without obvious delay impact.
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