ABB RINT Series MC Interface Boards

Technical Dossier

Product Details And Specifications

ABB RINT Series: Comprehensive Module Range and Technical Overview

The ABB RINT series comprises motor control (MC) interface boards engineered for integration within ABB's ACS600, ACS800, and ACS1000 medium-voltage and low-voltage variable frequency drive (VFD) platforms. These boards serve as the communication bridge between the drive's main control unit (RMIO/RDCO) and the inverter/rectifier power modules, handling gate pulse distribution, fault signal routing, and fiber-optic data transmission. Installed across global heavy industry sectors — including petrochemical refineries, nuclear auxiliary systems, offshore platforms, pulp and paper mills, and steel rolling lines — the RINT series represents one of the most widely deployed interface board families in industrial drive history. Installed base estimates exceed several hundred thousand units globally, with active deployments spanning equipment commissioned from the mid-1990s through the 2010s.

The Evolution of RINT Series Architecture

The RINT series was introduced alongside the ACS600 drive platform in the early 1990s. Initial variants such as the RINT-5411C and RINT-5413C used parallel copper-trace signal routing with discrete optocoupler isolation. As drive power ratings increased and EMI immunity requirements tightened, ABB transitioned to fiber-optic pulse transmission in the RINT-551x sub-family, of which the RINT-5513C is the primary representative. The ACS800 platform (launched ~1999) retained backward-compatible RINT form factors while introducing enhanced fault diagnostics via the DDCS (Distributed Drive Control System) protocol. By the ACS880 generation (2012 onward), ABB migrated to the BCON/BINT board architecture, rendering the RINT series legacy hardware. However, the installed base of ACS600 and ACS800 drives remains substantial, and RINT boards continue to be required for maintenance, repair, and overhaul (MRO) operations. Compatibility between sub-variants is hardware-revision dependent; substitution requires verification of the drive's software version and RMIO firmware.

RINT Series Full Catalog & Functionalities (SKU List)

MC Interface Boards — Fiber-Optic Gate Drive (ACS800 / ACS600 Compatible)

• RINT-5513C: MC interface board, fiber-optic gate pulse, ACS800 standard inverter module
• RINT-5511C: MC interface board, single inverter module, ACS600 early-series compatibility
• RINT-5512C: MC interface board, dual-channel fiber output, ACS600/ACS800 parallel inverter
• RINT-5514C: MC interface board, extended fault diagnostics, ACS800 high-power frame
• RINT-5516C: MC interface board, 6-pulse rectifier gate control, ACS800 R8i frame
• RINT-5518C: MC interface board, 12-pulse configuration, ACS800 regenerative unit

MC Interface Boards — Copper/Parallel Signal (ACS600 Legacy)

• RINT-5411C: MC interface board, parallel gate signal, ACS600 R2–R5 frame
• RINT-5413C: MC interface board, parallel gate signal, ACS600 R6–R7 frame
• RINT-5415C: MC interface board, parallel gate signal, ACS600 high-current frame

Rectifier & Supply Interface Boards

• RINT-6411C: Rectifier interface board, diode bridge monitoring, ACS800 supply unit
• RINT-6413C: Rectifier interface board, thyristor gate control, ACS800 ISU
• RINT-6511C: Rectifier interface board, fiber-optic, ACS800 active supply unit (ASU)
• RINT-6513C: Rectifier interface board, fiber-optic, ACS800 regenerative supply

Brake Chopper & Auxiliary Interface

• RINT-5611C: Brake chopper interface board, IGBT gate drive, ACS800 braking module
• RINT-5613C: Brake chopper interface board, extended current rating, ACS800 R8i–R11i
• RINT-5711C: Auxiliary interface board, fan/pump control signal routing, ACS800 auxiliary

Sourcing Hard-to-Find & Obsolete RINT Series Parts

ABB officially discontinued active production of the majority of RINT series boards following the ACS880 platform transition. Standard ABB distribution channels no longer stock most RINT variants as new units; availability is limited to certified repair centers and specialist spare parts distributors. DriveKNMS maintains a dedicated inventory of RINT series boards sourced from decommissioned drive systems, OEM overstock, and controlled-environment storage. All units are catalogued by hardware revision code and tested prior to dispatch. For end-users operating ACS600 or ACS800 drives beyond their original design life, DriveKNMS provides lifecycle extension support including board-level repair, functional testing, and cross-reference advisory for compatible substitute variants where direct replacements are unavailable. Lead times for obscure sub-variants (e.g., RINT-5711C, RINT-6413C) are quoted on request based on current stock position.

Quality Control for the RINT Series Range

RINT series boards present specific test challenges due to their fiber-optic transmitter/receiver circuits, high-voltage isolation barriers, and DDCS protocol dependency. DriveKNMS applies the following test protocol to all RINT boards processed through its facility: (1) Visual inspection for PCB delamination, capacitor bulge, and solder joint fatigue — common failure modes in boards exposed to thermal cycling over 10+ years. (2) Fiber-optic transmitter output power measurement using calibrated optical power meter; acceptance threshold per ABB service manual specification. (3) Isolation resistance test at 500 VDC between signal ground and power ground planes. (4) Functional gate pulse verification using a drive emulator bench that replicates RMIO control signals and confirms correct IGBT gate timing on all six channels. (5) DDCS communication loop-back test confirming data integrity at 10 Mbps. Boards that fail any stage are either repaired to component level or quarantined and not returned to inventory. Test records are retained per unit serial number.