ABB SNAT 600 Series Modules: SNAT602TAC

Technical Dossier

Product Details And Specifications

ABB SNAT 600 Series: Comprehensive Module Range and Technical Overview

The ABB SNAT 600 series represents a core family of interface, connector, and I/O modules deployed within ABB's ACS 600 and ACS 800 variable frequency drive (VFD) platforms. These drives are installed across heavy industrial sectors globally — including petrochemical refineries, nuclear auxiliary systems, pulp and paper mills, offshore platforms, and large-scale water treatment facilities. The SNAT 600 series provides the critical hardware layer between the drive's main control board and external field devices, communication networks, and I/O subsystems. Due to the long operational lifecycle of ACS 600 and ACS 800 installations (commonly 15–25 years), SNAT 600 series modules remain in active demand for maintenance, repair, and overhaul (MRO) procurement worldwide.

The Evolution of SNAT 600 Series Architecture

The SNAT 600 module family was introduced alongside the ACS 600 drive platform in the early 1990s, designed to ABB's modular backplane architecture. The series was engineered for plug-in compatibility with the NAMC (drive main control board) and NDIO/NINT interface boards, using a standardized 48-pin and 96-pin DIN connector format. Early variants focused on analog and digital I/O expansion. As industrial communication protocols evolved through the 1990s and 2000s, the SNAT series expanded to include fieldbus adapter interfaces (PROFIBUS, DeviceNet, Modbus, CANopen) via the NINT and RDCO adapter boards, which use SNAT-format connectors and mounting hardware.

With the transition to the ACS 800 and later ACS 880 platforms, ABB migrated core control functions to the RDCU and RMIO boards. However, the SNAT 600 connector and interface hardware retained backward compatibility for retrofit and upgrade projects. Many SNAT 600 modules are now classified as End-of-Life (EOL) or Discontinued by ABB, making third-party MRO suppliers the primary sourcing channel for ongoing maintenance contracts.

SNAT 600 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced models within the SNAT 600 series. Each module is classified by function:

Connector & Interface Modules

• SNAT602TAC: TAC connector set for ACS 600 drive interface board mounting and signal routing.
• SNAT601TAC: Alternate TAC connector assembly, single-row configuration for NAMC board interface.
• SNAT603TAC: Triple-row TAC connector set used in high-density I/O expansion configurations.
• SNAT604TAC: TAC connector set variant with extended pin pitch for high-vibration environments.
• SNAT605TAC: Connector assembly for NINT-01 fieldbus adapter board mounting.

Digital I/O Modules

• SNAT610DIO: 16-channel digital I/O expansion module, 24 VDC, compatible with NAMC-11 control board.
• SNAT611DIO: 8-channel digital input module, isolated, for ACS 600 standard I/O expansion.
• SNAT612DIO: 8-channel digital output module, relay type, 250 VAC/30 VDC rated contacts.
• SNAT613DIO: Combined 8DI/8DO module for compact panel installations.

Analog I/O Modules

• SNAT620AIO: 4-channel analog input module, 4–20 mA / 0–10 V selectable, 12-bit resolution.
• SNAT621AIO: 2-channel analog output module, 4–20 mA, for speed reference and torque command signals.
• SNAT622AIO: 4AI/2AO combined analog module for process control integration.

Communication & Fieldbus Adapter Modules

• SNAT630FBA: Fieldbus adapter mounting frame for NINT-series protocol boards (PROFIBUS, Modbus).
• SNAT631FBA: DeviceNet adapter interface module, compatible with ACS 600 NINT-09 board.
• SNAT632FBA: CANopen interface module for ACS 600 drives in automotive and material handling applications.

Power Supply & Auxiliary Modules

• SNAT640PSU: 24 VDC auxiliary power supply module for SNAT I/O backplane, 2A rated output.
• SNAT641PSU: Redundant power supply module for high-availability drive control panel configurations.

Sourcing Hard-to-Find & Obsolete SNAT 600 Series Parts

The majority of SNAT 600 series modules have been discontinued by ABB as the ACS 600 platform reached end-of-production. ABB's official spare parts program provides limited stock with extended lead times, often 16–26 weeks for EOL items. DriveKNMS maintains a dedicated inventory of SNAT 600 series modules sourced from decommissioned plant equipment, authorized surplus channels, and long-term storage stock. All units are catalogued by part number, hardware revision, and manufacturing date code.

For facilities operating ACS 600 drives under long-term service agreements (LTSA) or plant life extension (PLEX) programs, DriveKNMS provides: verified surplus stock with traceability documentation, functional test reports per module, and multi-year supply agreements for critical spare parts. Modules such as the SNAT602TAC, SNAT610DIO, and SNAT620AIO are stocked on a priority basis due to high MRO demand across refinery and power generation sectors.

Quality Control for the SNAT 600 Range

SNAT 600 series modules present specific quality verification challenges due to their backplane connector interfaces and mixed-signal bus architecture. DriveKNMS applies the following test protocol to all SNAT 600 units prior to shipment:

• Visual Inspection: PCB surface examination for corrosion, burnt components, cracked solder joints, and connector pin deformation under 10x magnification.
• Connector Integrity Test: TAC connector sets (e.g., SNAT602TAC) are tested for pin continuity, contact resistance (<50 mΩ per pin), and mechanical retention force.
• Functional Bench Test: I/O modules are tested on an ACS 600 drive test bench. Digital channels are verified for correct switching logic; analog channels are calibrated against a reference signal generator (±0.1% accuracy).
• Fieldbus Communication Test: FBA modules are verified for correct protocol handshake and data frame integrity using a protocol analyzer.
• Burn-In Screening: Selected modules undergo 48-hour powered burn-in at 40°C ambient to screen for early-life failures.
• Final Documentation: Each unit ships with a test report, part number label, and ESD-protective packaging.