NBRC-61
NBRC-61
NBRC-61

ABB NBRC-61 | ABB Series Motor Control Module with Chopper Regulation

  • Brand: ABB
  • Model: NBRC-61
  • Product Type: Industrial Control Board (Chopper & Motor Control Module)
  • Series: ABB Industrial Control Boards (Motor & Drive Accessories)
  • Core Function: Provides chopper-based voltage regulation and precise motor speed/torque control for variable frequency drive (VFD) systems; enables integration with industrial automation networks via communication interfaces.
  • Key Specs: 220V AC/12-24V DC power input, 30-40 kHz output frequency, IP20 enclosure, RS485/Ethernet communication support.
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Part number: ABB NBRC-61
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Description

NBRC-61: Product Overview
The NBRC-61 is an industrial control board designed for integration into ABB variable frequency drive (VFD) systems and broader automation architectures. Positioned as a core component for motor control and power conversion, it serves as an interface between VFD controllers and electric motors in applications requiring precise speed, torque, or voltage regulation. Its role is to execute chopper-based voltage modulation, optimizing power delivery to motors while enabling real-time feedback for closed-loop control.
Functionally, the board processes analog and digital signals from motor sensors (e.g., encoders, temperature probes) and VFD controllers, adjusting output frequency (30-40 kHz) to regulate motor operation. It handles chopper control logic to stabilize voltage under varying load conditions, ensuring efficient energy transfer and reducing harmonic distortion. As part of ABB’s industrial control board family, the NBRC-61 leverages the brand’s expertise in drive technology, offering compatibility with ABB ACS series VFDs and third-party PLC/DCS platforms (e.g., Siemens SIMATIC, Rockwell Allen-Bradley). Benefits of this platform include simplified integration, reduced wiring complexity, and access to ABB’s global technical support network. The board is suited for continuous process industries where motor reliability and energy efficiency are critical.

ABB NBRC-61

ABB NBRC-61

NBRC-61: Technical Specifications
  • Model Number: NBRC-61
  • Manufacturer: ABB
  • Product Type: Industrial Control Board (Chopper & Motor Control)
  • Power Supply: 220V AC (±10%, 50/60Hz) or 12-24V DC (optional version)
  • Output Frequency: 30-40 kHz (adjustable via software)
  • Control Method: Chopper-based pulse-width modulation (PWM)
  • Communication Interfaces: RS485 (Modbus RTU), Ethernet (Modbus TCP/IP, optional)
  • Input Signals: Analog (0-10V, 4-20mA), Digital (24V DC, dry contact)
  • Output Signals: PWM (to motor driver), Status relays (fault, ready)
  • Enclosure Protection: IP20 (dust-protected, cabinet mount)
  • Operating Temperature: -20°C to +60°C (extended storage: -40°C to +70°C)
  • Humidity Range: 5-95% RH non-condensing
  • Dimensions: 100mm x 100mm x 35mm (width x height x depth)
  • Weight: 0.15kg
  • Certifications: CE, UL, RoHS
Core Features & Customer Value​
Chopper-Based Voltage Regulation for Efficient Power Handling: The NBRC-61 uses pulse-width modulation (PWM) chopper control to dynamically adjust voltage levels, matching motor load requirements. This optimizes energy consumption in VFD systems, reducing power waste by up to 15% compared to fixed-voltage control. For engineers, this translates to lower operational costs in applications like conveyor systems or pumps, where variable loads are common.
Precise Motor Speed and Torque Control: By processing encoder feedback and adjusting output frequency (30-40 kHz), the board enables ±0.5% speed accuracy and stable torque delivery. In printing presses or CNC machines, this ensures consistent product quality by eliminating speed fluctuations during acceleration/deceleration cycles.
Integrated Communication for IIoT Readiness: The RS485 (Modbus RTU) and optional Ethernet (Modbus TCP/IP) interfaces allow connection to industrial IoT (IIoT) platforms or PLCs. Operators can remotely monitor motor status (e.g., temperature, load) and adjust parameters via SCADA systems, reducing on-site maintenance visits. For example, in a water treatment plant, this enables centralized control of multiple pump motors from a single HMI.
Rugged Design for Harsh Industrial Environments: With an IP20 enclosure and operating temperature range of -20°C to +60°C, the board withstands dust, vibration, and moderate temperature swings. Its compact size (100x100x35mm) minimizes space requirements in control cabinets, simplifying retrofits in legacy systems.
Compatibility with ABB Drive Ecosystem: As part of ABB’s control board family, the NBRC-61 integrates seamlessly with ACS 550/880 VFDs, leveraging shared configuration tools (e.g., ABB Drive Composer). This reduces engineering time during system upgrades, as engineers can reuse existing parameter sets.

NBRC-61

NBRC-61

Typical Applications​
The NBRC-61 is deployed in motor control systems requiring precise regulation. In an automotive assembly line, it controls servo motors for robotic arm positioning, using chopper regulation to maintain torque during part pick-and-place operations. Its RS485 interface connects to the line’s Siemens SIMATIC PLC, enabling synchronized motion across multiple robots.
At a solar power facility, the board manages pump motors for coolant circulation in photovoltaic inverters. The 30-40 kHz output frequency adjusts to variable sunlight intensity, optimizing inverter efficiency. The Ethernet interface sends performance data to a central monitoring system, alerting technicians to motor overheating before failure.
In a food processing plant, the NBRC-61 regulates mixer motors in dough-kneading machines. Its precise speed control ensures consistent dough texture, while IP20 protection guards against flour dust. The board’s compact size fits into existing control panels, avoiding costly cabinet modifications during a plant upgrade.

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