Overview
Manuals
Operating principle
Important Maintenance Rules
Features:
- Main Circuit Interface Board (or inverter driver board)
- Designed specifically for ABB ACS800 single drives and drive modules, covering models ACS800-01 and ACS800-04
- Engineered strictly for Frame Size R6 drives operating within a 380V to 500V range
The RINT-5611C (order number: 68718929) is a high-performance main circuit interface board designed by ABB Group, a renowned brand in industrial automation, specifically for its ACS800 series frequency converters (especially the R6 form factor models of the ACS800-01/04). This interface board serves as a crucial bridge between the internal power supply section and the core control unit of the frequency converter, featuring extremely high integration and electrical isolation protection levels.
On one hand, it can amplify and isolate the low-voltage control logic instructions issued by the inverter microprocessor (RMIO board) and accurately convert them into high-voltage trigger pulses, thereby directly controlling high-power electronic devices such as high-power thyristors and IGBTs. On the other hand, it collects real-time status data of the main circuit, such as voltage, current, and dynamic temperature (fault code 4210 is triggered when the temperature is too high), and feeds the data back to the core control system.
The RINT-5611C ABB Main Circuit Interface Board may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
ABB RINT-5611C Main Circuit Interface Board manual(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
The RINT-5611C operates primarily based on optical isolation technology, pulse modulation amplification, and feedback monitoring mechanisms. During inverter startup and operation, low-voltage control signals from the main control board are first electrically isolated via onboard optocouplers or transformers to prevent harmonics and overvoltages in the high-voltage circuit from damaging the microprocessor. The isolated control signals are then amplified by internal drive stage circuitry, converted into high-speed power pulses with specific amplitudes and steep rise times, and sent to the gates of power semiconductor devices such as thyristors.
During soft-start or normal inversion, it precisely controls the phase angle (phase-shift triggering) or conduction time of the trigger pulse in the sine wave, thereby altering the current flowing through the power devices to achieve smooth voltage and frequency rises or continuous regulation. Correspondingly, onboard sensing circuitry synchronously monitors real-time fluctuations in the high-voltage bus; once an anomaly is detected, the trigger pulse is immediately cut off to protect the entire device.
Forced Fan Replacement: According to the ABB official product manual, the option kit includes a built-in axial cooling fan. When installing the replacement RINT-5611C board, the cooling fan must be replaced simultaneously to ensure thermal balance of the drive and maintain warranty validity.
Hardware Configuration Pads: Before installing the replacement RINT board into the drive assembly, the technical guide requires configuring the board's current scaling factor. This is achieved by connecting specific pads on the PCB soldering surface (corresponding to the U, V, and W phases respectively) to match your drive capacity.
