Description
Used product. The REFU Elektronik SR27000B.2 is an industrial logic, control, processing and communication board designed for REFUSOL photovoltaic inverters. The board is a central part of the inverter control electronics and is used for signal processing, communication with other electronic modules, interface management and monitoring of the system's operating conditions.The board is identified by the marking SR27000B.2 and code 100289991. It was manufactured by REFU Elektronik and is marked Made in Germany.The board features an industrial high-density PCB with numerous SMD integrated circuits, programmable logic devices, power supply circuits and multiple connectors for interfacing with the different sections of the inverter.
⚙️ Main Functions
- REFUSOL inverter control and management
- Digital and analog signal processing
- Communication between electronic modules
- Communication interface management
- Input and output management
- Acquisition of signals from external sensors
- Communication with the control panel
- Operating data management
- Inverter status monitoring
- Diagnostic information management
- Communication with external monitoring systems
🔌 Interfaces & Connections
The SR27000B board family is associated with various interfaces used in REFUSOL inverters, including:
- Ethernet
- RS485
- Analog inputs
- Analog outputs
- Digital inputs
- Digital outputs
- Control panel connections
- Connections to other internal inverter circuits and modules
The PCB includes numerous connectors and silkscreen references, including X12, X19, X20, X21, X22 and X130, as well as various circuits identified by U, N, D, V and L designations.
The actual interface configuration may vary depending on the REFUSOL inverter model and hardware version.
🧠 Electronic Architecture
The board features a complex industrial electronic architecture including:
- SMD digital integrated circuits
- Programmable logic devices
- Processing and control circuits
- Interface circuits
- Power regulators and converters
- Signal conditioning circuits
- Protection components
- Inductors
- SMD capacitors and resistors
- High-density multipole connectors
Lattice components are also visible on the PCB and are used for programmable logic functions, together with numerous integrated circuits dedicated to signal processing and communication.
☀️ Use in REFUSOL Inverters
The SR27000B.2 is used as a control and communication unit in REFUSOL inverter systems.
The board allows the system to:
- Acquire information from measurement circuits
- Process analog and digital signals
- Communicate with the power section
- Communicate with other electronic modules
- Manage RS485 and Ethernet interfaces
- Interface with the control panel
- Manage input and output signals
- Participate in inverter diagnostics
It is therefore a specialized component primarily intended for repair, maintenance and refurbishment of REFUSOL photovoltaic inverters.
⚠️ Errors & Faults Potentially Associated with the Board
A malfunction of the control board may contribute to certain inverter errors. Documented REFUSOL error codes include:
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0x40001 – Internal Communication: internal communication error or timeout between the control board and power section.
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0x0A0000 – FPGA Firmware: FPGA firmware issue or firmware version incompatibility.
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0x40010 – System Error 1: system error/crash.
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0x090002 – Program CRC Error: program memory integrity check error.
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0x090004 – RAM Error 1: RAM memory error.
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0x090005 – MMU Exception: memory management/protection error.
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0x0B0001 – System 1: system error-management fault.
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0x0B0002 – System 2: error memory full.
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0x0B0003 – System 3: error during error acquisition or management.
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0x0D0001 – System Error: communication problem with the power section during certain operations, including firmware updates.
🔧 Important Diagnostic Note
The appearance of one of these error codes does not necessarily mean that the SR27000B.2 board itself is defective.
For example, an internal communication error may be caused by the control board, power section, wiring, connectors or other inverter components.
For this reason, the board should be diagnosed on a compatible REFUSOL inverter before its functionality can be confirmed.
🛠 Possible Symptoms of a Board Problem
Depending on the fault, a malfunctioning control board may result in:
- Inverter failing to complete startup
- Loss of internal communication
- No communication with the control panel
- System errors
- RS485/Ethernet communication problems
- Firmware-related errors
- Memory errors
- Loss of communication with the power section
- Inverter shutdowns or restarts
- Failure to complete the initialization process correctly
🔧 Applications
This board is primarily suitable for:
- REFUSOL inverter repair
- Replacement of damaged electronic boards
- Photovoltaic system maintenance
- Industrial inverter refurbishment
- REFUSOL equipment recovery
- Electronic diagnostics
- Replacement parts for specialized technicians
📋 Technical Specifications
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Manufacturer: REFU Elektronik
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Family: REFUSOL
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Type: Logic / Control & Communication Board
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Model: SR27000B.2
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Part Number: 100289991
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PCB Marking: SR27000B
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Manufacture: Made in Germany
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Technology: High-density industrial electronic PCB
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Interfaces: Ethernet, RS485, analog and digital I/O, internal connections, depending on inverter configuration
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Application: REFUSOL photovoltaic inverters
📦 Package Contents
- 1 × REFU Elektronik SR27000B.2 Logic Control & Communication Board
- Original PCB
- Integrated electronic components and connectors
Supplied exactly as shown in the photographs.
🟢 Product Condition
Used product. The board is sold in the condition shown in the photographs and may show normal signs of previous use and handling.
The components and connectors are visible in the photographs. Electronic functionality has not been verified through testing on a compatible inverter. Therefore, without a functional test, the board should be considered used and untested.
Sold exactly as shown in the photographs, without additional accessories or wiring unless specifically stated.
