ABB NBRC-61C 61357246F Chopper Brake Unit Control Board

Overview

The ABB NBRC-61C 61357246F is a chopper brake unit control board designed for ABB industrial drive systems. It regulates braking energy by monitoring DC bus voltage and triggering an external braking resistor when necessary, ensuring safe dissipation of excess energy during motor deceleration.

General Information

Part Number: NBRC-61C / 61357246F

Manufacturer: ABB

Brand / Country of Origin: ABB / Switzerland

Series: Drive Control & Protection Modules

Type: Chopper Brake Unit Control Board

Application: DC bus overvoltage protection and braking energy management in industrial drives

Installation: Internal mounting within ABB drive cabinet or control assembly

Function: Controls braking unit operation to dissipate regenerative energy safely

Power Specifications

Operating Supply: Powered via drive internal control system

DC Bus Monitoring: Integrated voltage detection and threshold control

Switching Control: High-speed trigger signal for braking chopper unit

Protection Features: Overvoltage and thermal protection supported by drive system

Energy Handling: Designed for dynamic braking energy dissipation via external resistor

Communication & Interface

Control Interface: Direct integration with ABB drive control circuitry

Signal Type: DC bus voltage monitoring and braking trigger signals

Output Function: Controls external braking chopper unit switching

System Feedback: Status and fault reporting through drive diagnostics

Integration: Fully compatible with ABB industrial drive platforms

Environmental

Operating Temperature: -20 to +60 °C

Storage Temperature: -40 to +85 °C

Humidity: Up to 95% non-condensing

Cooling Method: Cabinet airflow or forced ventilation

Installation Environment: Industrial control cabinet (protected enclosure)

Dimensions & Weight

Dimensions: 110 × 69 × 30 mm

Weight: 0.15 kg

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