ABB 93-3004-01 1MRK002122-ABr07 is a high-performance signal conditioning and interface module from the ABB Relion series, specifically designed for power system relay protection devices.Its core function is to provide electrical isolation, signal conversion, data transmission and interface adaptation between protection relays, field sensors, actuators and upper-level control systems, ensuring stable, reliable and precise operation of power protection systems in complex industrial and power grid environments.As an advanced version (ABr07) of the 1MRK002122 series, the 93-3004-01 1MRK002122-ABr07 integrates comprehensive isolation protection, multi-type signal processing and communication adaptation capabilities.It is widely used in medium and low voltage power grids, industrial power distribution, substation automation and other scenarios, serving as a key hardware link connecting the core unit of relay protection with external equipment.
Basic Information
Model: 93-3004-01 1MRK002122-ABr07Series: ABB Relion Series Relay Protection AccessoriesType: Relay Protection Adaptation Module / Interface Conversion ModuleAlias: LR LDCM Long-Range Line Data Communication Adaptation ModuleApplication Scenarios: Medium and low voltage substations, industrial power distribution systems, auxiliary power in power plants, new energy grid connection protection, rail transit power supply and other relay protection systems
Functional Features
Multi-Type Signal Isolation and Conversion
Supports electrical isolation and format conversion for various field signals including analog (4–20mA, 0–5V, 0–10V), digital (dry contact, NPN/PNP, TTL), and pulse signals. Isolation voltage reaches up to 2.5kV, effectively blocking ground potential differences, surges and interference signals.Achieves safe isolation between weak internal signals of protection devices and strong field signals, preventing reverse impact of on-site fault signals on the core protection unit and improving system anti-interference performance and security.
Interface Adaptation and Expansion
Equipped with multiple isolated digital input/output interfaces, analog input interfaces, and communication interfaces (RS485, fiber port). Can directly connect field devices such as CT/PT transformers, circuit breaker auxiliary contacts, position switches and thermostats.Compatible with ABB RELION series protection devices (REF615, REM610, RET615, etc.) and mainstream third-party protection equipment. Supports plug-and-play installation, simplifying system wiring and configuration.
High-Speed Data Transmission and Communication Support
Built-in high-speed signal processing chip with signal conversion response time ≤5ms, ensuring real-time transmission of fault signals and meeting the quick-action requirements of relay protection.Supports industrial and power communication protocols such as Modbus RTU, PROFIBUS DP, IEC 61850, and can be directly connected to Substation Automation Systems (SAS) and SCADA systems for remote monitoring and uploading of protection data.Fiber interface (single-mode 1550nm) supports long-distance data transmission up to 20km, suitable for protection signal acquisition in outdoor and long-distance distribution lines.
Industrial-Grade Reliability Design
Wide operating temperature range (-40℃~+85℃), adapting to harsh industrial and outdoor environments including high/low temperature, humidity and dust.Provides comprehensive protection against overcurrent, overvoltage, reverse connection, ESD and surge. Mean Time Between Failures (MTBF) ≥ 100,000 hours.Modular PCB design with plug-in terminals supports online replacement and maintenance, reducing system downtime.
Status Monitoring and Fault Diagnosis
Integrated LED status indicators for real-time display of power supply, signal input/output, communication and fault status, facilitating quick on-site troubleshooting.Supports self-diagnosis and uploading of fault signals. Can report module abnormalities, signal loss, communication interruptions and other information via communication interfaces to assist system operation and maintenance.
Specifications
Physical Parameters
- Dimensions: approx. 145mm × 45mm × 100mm
- Weight: approx. 380g
- Mounting: standard DIN rail mounting / panel mounting
Power Parameters
- Operating voltage: 24V DC (±10%)
- Power consumption: ≤5W
- Reverse polarity protection: Yes
Digital Interface
- Digital input: 8 isolated dry contact / active input channels
- Digital output: 6 relay output channels (contact rating: 5A/250V AC, 5A/30V DC)
Analog Interface
- Analog input: 4 isolated analog channels (configurable for 4–20mA / 0–5V)
- Accuracy: ±0.1% F.S.
Communication Interface
- RS485 × 1 (Modbus RTU)
- Fiber optic interface × 1 (single-mode 1550nm)
- PROFIBUS DP, IEC 61850 available as options
Isolation Performance
- Signal–power isolation: 2.5kV AC
- Input–output isolation: 2.5kV AC
- Communication interface isolation: 2.5kV AC
Environmental Parameters
- Operating temperature: -40℃ ~ +85℃
- Storage temperature: -55℃ ~ +125℃
- Relative humidity: 5% ~ 95% (non-condensing)
- Ingress protection: IP20
Certification Standards
- Compliant with power and industrial safety standards including IEC 60255, IEC 61000, CE, UL, cUL
Application Scenarios
- Substation Relay Protection Systems: Serves as the front-end signal conditioning unit for REF615 feeder protection, REM610 motor protection and other devices. It collects line current, voltage and circuit breaker position signals, transmits them to the protection core after isolation, and outputs protection action signals to control circuit breaker tripping.
- Industrial Power Distribution Protection: Used in high-voltage/low-voltage power distribution rooms of factories, connecting protection devices for motors, transformers and capacitor banks to achieve safe connection between field equipment signals and protection systems, ensuring stable power supply for industrial production.
- New Energy Grid-Connection Protection: Compatible with protection devices in wind power and PV grid-connection cabinets, processes fault signals of inverters and box-type transformers, meeting the requirements of fast protection and isolation for new energy grid connection.
- Long-Distance Distribution Line Protection: Realizes long-distance reliable transmission of remote line protection signals via optical fiber interface, solving the interference and distance limitations of traditional cable transmission.
Frequently Asked Questions (FAQ)
- What is the difference between 1MRK002122-ABr07 and other models in the same series such as ABr00/02/05?All belong to the 1MRK002122 series. The core differences lie in interface configuration, communication functions and number of signal channels: ABr00 is a basic communication version, supporting only basic RS485 and a small number of digital I/O; ABr02 adds analog input interfaces; ABr05 extends optical fiber communication and multi-channel digital output; ABr07 is a full-featured version integrating multi-channel analog/digital interfaces, dual communication protocols, long-distance optical fiber transmission and complete isolation protection, suitable for complex protection scenarios.
- Is this module compatible with protection devices of non-ABB brands?Yes. The module adopts standard industrial interfaces (RS485, dry contacts, 4–20mA) and universal protocols (Modbus RTU). It can realize signal conditioning and communication docking as long as the third-party protection device supports corresponding interfaces and protocols. However, when matched with the ABB Relion series, it achieves deep protocol adaptation and plug-and-play for optimal performance.
- Are additional isolation devices required for module installation?No. The module features a built-in 2.5kV full isolation design covering power supply, input, output and communication channels, which already meets the isolation and anti-interference requirements of power system relay protection. It can be directly wired on site without additional isolators, repeaters or other components.
- Can the digital output contacts of the module directly control high-voltage circuit breakers?Direct control is not recommended. The output contact rating of the module is 5A/250V AC, which is only suitable for controlling low-voltage circuits, intermediate relays, signal indicators, etc. To control high-voltage circuit breakers, the module output contacts should drive intermediate relays, whose contacts then control the circuit breaker tripping circuit to ensure operational safety.
- How to quickly troubleshoot communication interruptions or signal abnormalities of the module?First, check the module LED indicators: if the power indicator is off → inspect the 24V DC power supply and wiring; if the signal indicator does not light up → check the field input signal wiring and equipment; if the communication indicator blinks abnormally → inspect communication cables, protocol parameters and address configuration.Second, use a multimeter to measure the voltage/current of input/output signals to determine whether the fault comes from field equipment or internal module abnormality.Third, if the module is faulty, it can be directly plugged and replaced with an identical model without reconfiguring system parameters.
- Does the module support firmware upgrade and function expansion?Yes. Firmware upgrade, protocol configuration, I/O parameter customization and other operations can be performed via the RS485 interface connected to ABB protection configuration software (such as PCM600). Some functions (e.g., adding new communication protocols) can be activated through software authorization without hardware replacement.
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