ABB NINT-68C Interface Board | ACS Series Control Module for VFDs

Product Overview

The ABB NINT-68C is a high-performance interface and control board engineered for integration with ABB ACS600 and ACS800 series variable frequency drives (VFDs). It functions as a central signal processor, translating commands from the main control unit to the drive’s power modules, ensuring accurate and stable motor operation.

Featuring fiber-optic communication, the board delivers fast, interference-free data exchange with complete galvanic isolation between control logic and power electronics. Its modular design allows straightforward integration into industrial inverter systems while supporting real-time monitoring, fault detection, and robust operation in demanding environments.

Key Features

High-Speed Signal Handling

The board efficiently manages pulse width modulation (PWM) and other control signals, maintaining precise motor operation under high load conditions. Its low-latency design ensures rapid response in high-frequency switching environments.

Fiber-Optic Connectivity

Fiber-optic links provide reliable communication between the control unit and power modules, eliminating electromagnetic interference and enhancing system protection against voltage surges.

Advanced Diagnostics

Integrated status indicators and fault reporting allow immediate detection of overcurrent, overtemperature, or communication issues. Diagnostic feedback supports rapid corrective action and enhances system reliability.

Industrial-Grade Durability

The board is designed for rugged industrial use:

• Conformal Coating: Protects against dust, moisture, and chemical exposure.

• Temperature Resilience: Operates reliably under high ambient temperatures inside enclosed drive cabinets.

Technical Specifications

Typical Applications

• Heavy-Duty Industrial Drives: Mining, oil & gas, water treatment

• Parallel Power Modules: Multi-module drives for high-power applications

• System Upgrades: Replacement or retrofit in existing ABB ACS drive systems

Note: When installing a replacement NINT-68C, ensure compatibility between the board firmware and the main control unit to prevent communication errors.

FAQ

Q: Can the NINT-68C be retrofitted into older ABB ACS drives?
A: Yes, but firmware compatibility with the main control board must be verified.

Q: How does the board protect against interference?
A: Fiber-optic links provide galvanic isolation and eliminate EMI between control and power circuits.

Q: Is the board durable in harsh industrial environments?
A: Yes, conformal coating and high-temperature tolerance ensure long-term reliability.

Q: Which ABB drive models are compatible?
A: Compatible with ACS600, ACS800, and certain DCS systems.