The 1MRK002122-ABr00 is an optical remote line data communication module developed by ABB specifically for industrial automation and power control systems.
Its core function is to enable long-distance, highly reliable data transmission, signal isolation conversion, and remote I/O management and control between the control layer and the field layer.Featuring optical communication with strong anti-interference performance, multi-protocol compatibility, and high industrial-grade protection, it serves as a core communication component in demanding industrial environments such as power, metallurgy, petroleum, and chemical processing.
Functional Features
Optical Communication & Signal Isolation
Equipped with a 1550 nm single-mode fiber input interface, it supports ultra-long-distance data transmission and enables interference-free communication between controllers and remote field devices.It features full electrical isolation to realize isolation conversion between controller digital signals and field analog/digital I/O signals, eliminating the impacts of ground potential differences and electromagnetic interference on the system, and ensuring stable data acquisition and control command transmission.
Multi-Industrial Protocol Compatibility
Natively supports mainstream industrial communication protocols such as Modbus RTU, PROFIBUS DP, and CANopen, allowing seamless integration with various distributed control systems (DCS) and programmable logic controllers (PLC). No additional protocol conversion equipment is required, reducing system integration complexity.
Remote I/O Control & Data Acquisition
Supports data interaction and control for remote I/O stations, and can directly connect to field sensors and actuators to implement distributed signal acquisition and control command issuance, adapting to large-scale and decentralized industrial control architectures.
Industrial-Grade Reliability Design
With an IP65 protection rating, it is fully dust-tight and splash-proof, enabling stable operation in harsh industrial environments such as humidity, dust, and corrosive gases.It operates within a temperature range of -20°C to +60°C, adapting to extreme temperature difference scenarios; with power consumption below 2W, it saves energy and generates low heat, improving long-term operational stability.
Modular & Flexible Deployment
Adopts a compact design with dimensions of 74 mm × 370 mm × 361 mm, and supports standard DIN rail mounting for quick installation, expansion, and maintenance in control cabinets, meeting the flexible networking requirements of distributed control architectures.
Technical Specifications
Product Model｜1MRK002122-ABr00 (LR LDCM)Communication Interface｜1550 nm single‑mode fiber interface, RS‑485 electrical interfaceSupported Protocols｜Modbus RTU, PROFIBUS DP, CANopenSignal Function｜Isolated conversion of digital/analog signals, remote I/O data transmissionProtection Class｜IP65Operating Temperature｜-20 ℃ ~ +60 ℃Power Consumption｜＜2 WMounting｜DIN rail mountingDimensions｜7.4 mm (W) × 37 mm (H) × 36.1 mm (D)
Applications
- Power Systems｜Substation automation, remote power grid monitoring, relay protection device communication
- Petrochemical Industry｜Remote data acquisition in oil and gas fields, distributed control of refining and chemical plants
- Metallurgical Industry｜Remote I/O management for blast furnaces and rolling production lines
- Rail Transit｜Station equipment monitoring, train control system communication
- Infrastructure｜Automation control for water conservancy hubs and wastewater treatment plants
Frequently Asked Questions (FAQ)
Q1: What are the differences between 1MRK002122-ABr00 and other models in the same series such as ABr01/02?A: The core differences lie in communication interfaces and protocol configurations. The ABr00 is a basic version equipped with a standard 1550nm single-mode fiber and multi-protocol support. Derivative models including ABr01/02 add features like dual-fiber redundancy, extended protocols (e.g., Modbus TCP), additional I/O channels, or enhanced protection ratings, making them suitable for applications requiring higher redundancy or complex protocol support.
Q2: What is the maximum optical fiber transmission distance of the module?A: When used with standard single-mode fiber, the maximum relay-free transmission distance can reach 20 km. For longer distances, optical fiber repeaters can be used to extend the range, meeting communication requirements for ultra-long-distance industrial scenarios.
Q3: Does the module support hot-plugging?A: Direct hot-plugging is not supported. Before replacement or installation, power to the module as well as optical fiber and electrical connections must be disconnected first to avoid interface damage or system communication interruption caused by live operation. Power supply and connections can be restored step by step after installation is completed.
Q4: How to troubleshoot module communication failures?A:
- Check optical fiber interfaces: Ensure fiber ferrules are clean and securely connected, with no bending or damage.
- Verify protocol parameters: Confirm that communication protocols, baud rates, and addresses of the module and the main controller are fully matched.
- Check status indicators: The module is equipped with run/fault indicators. Steady or abnormal flashing indicates power, communication, or signal faults, which can be located by referring to the manual.
- Test electrical isolation: Use a multimeter to check the electrical insulation of isolated terminals and rule out short-circuit or grounding faults.
Q5: Which ABB control systems is the module compatible with?A: It can be seamlessly connected to mainstream ABB control systems including System 800xA DCS, AC 800PEC, and Advant OCS. It is also compatible with third-party PLCs/controllers supporting protocols such as Modbus RTU and PROFIBUS DP, featuring strong universality.
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