ABB RINT Series Interface Boards: RINT-6621C 6830696F

Technical Dossier

Product Details And Specifications

ABB RINT Series Interface Boards: Comprehensive Module Range and Technical Overview

The ABB RINT series of interface boards constitutes a critical subsystem within ABB's industrial AC drive platforms, specifically the ACS600 and ACS800 families. These drives are deployed at scale across global heavy industry sectors including petrochemical refineries, nuclear power auxiliary systems, offshore oil & gas platforms, pulp and paper mills, and large-scale water treatment infrastructure. The RINT board functions as the primary communication and signal-conditioning bridge between the drive's main control board (RMIO/RDCO) and the power electronics stack (AINT/BINT gate driver boards). A failure or degradation of any RINT module results in immediate drive fault, making reliable spare parts availability a tier-1 operational continuity requirement for plant maintenance engineers worldwide.

The Evolution of RINT Series Architecture

The RINT board lineage traces its origin to ABB's DTC (Direct Torque Control) drive architecture introduced in the mid-1990s with the ACS600 platform. Early RINT variants (RINT-5511, RINT-5521) were designed for the IGBT gate driver interface in ACS600 R2i–R6i frame sizes, operating on a fiber-optic DDCS (Distributed Drive Control System) communication backbone. As ABB transitioned to the ACS800 platform in the early 2000s, the RINT series was re-engineered to accommodate higher switching frequencies, expanded I/O mapping, and dual-channel fiber-optic redundancy. The 6621C sub-variant (board code 6830696F) represents a mature revision within the ACS800 single-drive and multidrive cabinet topology, optimized for R5–R8 frame compatibility. By the 2010s, ABB introduced the ACS880 platform with the AINT/BINT/CINT architecture, effectively superseding RINT in new installations. However, the installed base of ACS600 and ACS800 drives globally remains in the hundreds of thousands of units, sustaining active demand for RINT spare parts through at least 2035 under extended lifecycle support programs.

RINT Series Full Catalog & Functionalities (SKU List)

Interface Boards (Primary Gate Driver Interface)

• RINT-6621C (6830696F): ACS800 R5–R8 IGBT gate driver interface board, dual fiber-optic DDCS port
• RINT-6611C: ACS800 single-drive R2i–R4i frame gate driver interface, single fiber channel
• RINT-5521C: ACS600 R5i–R8i frame IGBT interface board, DDCS fiber-optic topology
• RINT-5511C: ACS600 R2i–R4i frame interface board, early-generation DTC gate signal routing
• RINT-6421C: ACS800 multidrive inverter module interface, parallel IGBT stack support
• RINT-6431C: ACS800 multidrive supply unit interface board, active front-end (AFE) variant
• RINT-6611: Legacy non-C revision for ACS800 R2i–R4i, predecessor to RINT-6611C
• RINT-6621: Legacy non-C revision for ACS800 R5–R8, predecessor to RINT-6621C

Communication & Adapter Boards (DDCS / Fieldbus Interface)

• RDCO-01C: DDCS fiber-optic communication board for RMIO, CH0 master link
• RDCO-02C: Dual-channel DDCS board, CH0 + CH1 for multidrive ring topology
• RDCO-03C: DDCS board with extended buffer for high-node-count drive systems
• RDCO-04C: DDCS communication board, ACS800-17/37 cabinet drive variant

Control & I/O Boards (RMIO Platform)

• RMIO-01C: Main control board for ACS800, DTC firmware, analog/digital I/O, DDCS interface
• RMIO-02C: ACS800 control board with extended I/O and encoder feedback support
• RMIO-11C: ACS800 multidrive control board, cabinet-level system controller variant

Power Supply Boards

• APOW-01C: Auxiliary power supply board for ACS800 control section, 24 VDC regulated output
• NPOW-41C: Internal power supply module for ACS800 R5–R8 frame control electronics

Sourcing Hard-to-Find & Obsolete RINT Series Parts

ABB formally discontinued active production of the RINT-6621C and related RINT-series boards as new ACS880 installations replaced ACS800 in greenfield projects. However, the operational reality for maintenance engineers is that ACS800 drives embedded in existing plant infrastructure carry 15–25 year service life expectations, and full drive replacement is economically and logistically prohibitive in mid-cycle. DriveKNMS maintains a dedicated inventory program for end-of-life ABB drive control boards, sourcing RINT modules through certified secondary market channels, factory-surplus liquidations, and decommissioned equipment recovery. Each unit is individually catalogued by board revision code (e.g., 6830696F for RINT-6621C) to ensure cross-compatibility verification before dispatch. For plant engineers managing ACS600 or ACS800 fleets, DriveKNMS provides multi-unit quotations, consignment stock agreements, and emergency same-day dispatch for critical spares.

Quality Control for the RINT Series Range

RINT-series boards present specific test challenges due to their role as the signal interface between low-voltage control logic and high-voltage IGBT gate driver circuits. DriveKNMS applies a structured test protocol for all RINT units prior to shipment. Each board undergoes visual inspection for capacitor ESR degradation, fiber-optic transceiver output power verification (HFBR-series emitter/detector pairs), IGBT gate signal integrity testing under simulated PWM load conditions, and DDCS communication loopback verification using ABB-compatible test fixtures. Boards exhibiting gate signal asymmetry exceeding ±50 ns or fiber TX power below –15 dBm are rejected. All tested units are assigned a unique test record ID and shipped with a 12-month functional warranty. Revision-specific firmware compatibility (e.g., RMIO firmware 17.x vs. 19.x interaction with RINT-6621C) is documented in the accompanying test report.