ABB NINT Series Modules: NINT-52 57619066E

Technical Dossier

Product Details And Specifications

ABB NINT Series: Comprehensive Module Range and Technical Overview

The ABB NINT series comprises fieldbus adapter and interface boards designed for integration with ABB ACS series AC drives (ACS 600, ACS 800, ACS 1000, ACS 6000). These modules are deployed across global heavy industry verticals including petrochemical refineries, nuclear power auxiliary systems, offshore platforms, pulp and paper mills, and steel rolling mills. The NINT series serves as the communication backbone between ABB variable frequency drives and plant-level control networks, supporting protocols including PROFIBUS-DP, DeviceNet, Modbus RTU, CANopen, ControlNet, and Ethernet/IP. Installed base spans hundreds of thousands of drive units globally, making lifecycle support for this series a critical operational requirement for maintenance engineers and procurement teams.

The Evolution of NINT Series Architecture

The NINT series was introduced alongside the ACS 600 platform in the mid-1990s as a modular fieldbus adapter solution. Early variants such as the NINT-21 and NINT-31 provided basic PROFIBUS-DP and Modbus connectivity via the drive's DDCS (Distributed Drives Communication System) optical fiber interface. As industrial Ethernet adoption accelerated through the 2000s, ABB expanded the NINT range to include Ethernet-based adapters and dual-port variants for redundant network topologies.

With the transition to the ACS 800 and ACS 880 platforms, ABB introduced the RINT and RDNA series as functional successors, while the NINT series entered a maintenance-only lifecycle phase. Many NINT modules are now classified as obsolete or limited availability by ABB, with no active production. However, the installed base of ACS 600 and early ACS 800 drives remains substantial in long-lifecycle industries, creating sustained demand for NINT spare parts through specialist distributors. Compatibility between NINT generations is slot-specific and firmware-dependent; cross-substitution requires verification of drive firmware revision and option slot assignment.

NINT Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified members of the ABB NINT series interface board family, classified by function:

Fieldbus Adapter Modules — PROFIBUS-DP

• NINT-21: PROFIBUS-DP adapter for ACS 600, 9.6–12 Mbps, DDCS optical interface
• NINT-21C: PROFIBUS-DP adapter, conformal-coated variant for harsh environments
• NINT-31: PROFIBUS-DP adapter for ACS 800 option slot D, supports GSD file configuration
• NINT-31C: Conformal-coated PROFIBUS-DP module for ACS 800 high-humidity installations

Fieldbus Adapter Modules — DeviceNet / CANopen

• NINT-41: DeviceNet adapter for ACS 600/800, supports explicit and I/O messaging
• NINT-41C: Conformal-coated DeviceNet variant
• NINT-61: CANopen adapter, DS402 drive profile, ACS 600/800 compatible

Fieldbus Adapter Modules — Modbus / Serial

• NINT-51: Modbus RTU/ASCII adapter, RS-485 interface, ACS 600/800
• NINT-51C: Conformal-coated Modbus RTU variant
• NINT-52: Modbus RTU interface board, revised PCB layout, part number 57619066E — current listing
• NINT-52C: Conformal-coated variant of NINT-52 for marine and offshore applications

Fieldbus Adapter Modules — ControlNet / Ethernet

• NINT-71: ControlNet adapter for ACS 800, coaxial BNC connection, NUT/NAP support
• NINT-72: Dual-port ControlNet adapter, linear and ring topology support
• NINT-81: Ethernet/IP adapter, 10/100 Mbps, ACS 800 option slot compatible

Interface and Auxiliary Boards

• NINT-11: Interbus-S adapter for ACS 600, optical fiber ring topology
• NINT-91: Lonworks FTT-10A adapter, ACS 800, 78 kbps free topology

Sourcing Hard-to-Find & Obsolete NINT Series Parts

The majority of NINT series modules have been discontinued by ABB and are no longer available through standard distribution channels. DriveKNMS maintains a dedicated inventory of tested NINT spare parts sourced from decommissioned drive systems, authorized surplus channels, and controlled factory stock. Our procurement team actively tracks global availability of NINT-21, NINT-31, NINT-41, NINT-51, NINT-52 (57619066E), NINT-71, and NINT-81 variants.

For customers operating ACS 600 or ACS 800 drives in long-lifecycle facilities — including nuclear auxiliary systems, chemical processing, and water treatment — DriveKNMS provides lifecycle extension support including: verified replacement sourcing, cross-reference validation against drive firmware revision, and documentation of functional equivalents where direct replacements are unavailable. All obsolete NINT modules are supplied with test reports and, where applicable, refurbishment records.

Quality Control for the NINT Series Range

NINT series boards incorporate multi-layer PCBs with DDCS optical transceivers, ASIC-based protocol controllers, and SMD passive arrays that require specialized test procedures. DriveKNMS applies the following verification protocol to all NINT units prior to dispatch:

• Visual inspection: PCB trace integrity, capacitor condition, optical transceiver lens clarity, connector pin alignment
• Functional bench test: Module powered via ACS 600/800 drive test rig; fieldbus communication verified at rated baud rate using protocol analyzer
• DDCS link test: Optical fiber loopback test to confirm transceiver TX/RX power within ABB specification
• Firmware compatibility check: Module firmware version logged and cross-referenced against target drive firmware matrix
• Burn-in cycle: 48-hour operational test under simulated load conditions prior to packaging
• ESD packaging: All units shipped in anti-static bags with humidity indicator cards