ABB SNAT Series Modules

Technical Dossier

Product Details And Specifications

ABB SNAT Series: Comprehensive Module Range and Technical Overview

The ABB SNAT series represents a core family of control, interface, and I/O boards deployed across ABB's ACS and DCS variable speed drive platforms. These modules are installed in mission-critical industrial environments including petrochemical refineries, nuclear power auxiliary systems, offshore platforms, pulp and paper mills, and large-scale water treatment facilities. The SNAT architecture underpins drive control logic for medium-voltage and low-voltage AC drive cabinets manufactured by ABB from the early 1990s through the 2010s. Due to the long operational lifecycle of ABB drive systems — often 20 to 30 years — SNAT series boards remain in active demand for maintenance, repair, and overhaul (MRO) operations globally. DriveKNMS maintains a dedicated inventory of SNAT series modules to support facilities that cannot justify full drive replacement.

The Evolution of SNAT Series Architecture

The SNAT board family was introduced as part of ABB's modular drive control philosophy in the ACS 600 and DCS 600 platforms. Early SNAT boards (circa 1993–1998) used parallel bus communication with discrete logic ICs and were designed for direct backplane integration into ABB drive cabinets. Mid-generation boards (1999–2006) introduced ASIC-based gate drive logic, improved EMC shielding, and compatibility with DDCS (Distributed Drive Control System) fiber-optic communication. Later revisions incorporated surface-mount technology (SMT) and enhanced thermal management for high-cycle industrial environments. The SNAT series interfaces directly with ABB's NAMC, NDIO, NINT, and AINT board families, forming a complete modular control stack. As ABB transitioned to the ACS 800 and ACS 880 platforms, many SNAT functions were consolidated into newer AINT and RDCU boards; however, installed SNAT-based systems remain in operation and require original-specification replacement parts for compatibility.

SNAT Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced modules within the ABB SNAT series. Each entry reflects the module's primary function within the drive control architecture:

SNAT7261INT: Main interface board for ACS/DCS 600 series; manages control signal routing between drive CPU and I/O subsystems.
SNAT7260C: Control board assembly for ACS 600; handles PWM signal generation and gate drive coordination.
SNAT7262: Auxiliary interface board; provides supplementary I/O expansion for multi-axis drive configurations.
SNAT7600: Power supply board for SNAT backplane; delivers regulated DC rails to control electronics.
SNAT7610: Rectifier control board; manages thyristor firing sequences in DCS 600 DC drive systems.
SNAT7620: Field excitation control board for DCS 600; regulates DC motor field current.
SNAT7630: Measurement and feedback board; processes encoder, tachometer, and current feedback signals.
SNAT7640: Serial communication adapter board; supports RS-232/RS-485 fieldbus integration.
SNAT7650: Analog I/O expansion board; provides 4–20 mA and ±10 V signal conditioning channels.
SNAT7660: Digital I/O board; 24 VDC discrete input/output module for drive interlock and status signals.
SNAT7670: Fiber-optic DDCS communication board; links drive control to ABB master controllers via optical link.
SNAT7680: Gate driver interface board; transmits IGBT/thyristor firing pulses to power stage modules.
SNAT7690: Diagnostic and monitoring board; logs fault codes and provides local HMI interface support.
SNAT7700: CPU module for ACS 600 control unit; executes drive application software and parameter management.
SNAT7710: Memory expansion board; extends parameter storage and application program capacity for SNAT CPU modules.
SNAT7720: Synchronization board; manages multi-drive synchronization in parallel converter configurations.
SNAT7730: Overvoltage protection interface board; monitors DC bus voltage and triggers protective shutdown sequences.

Sourcing Hard-to-Find & Obsolete SNAT Series Parts

The majority of SNAT series boards have been discontinued by ABB as standard catalog items. ABB's official end-of-life policy for ACS 600 and DCS 600 platforms means that OEM new-stock availability is effectively zero for most SNAT SKUs. DriveKNMS operates a global procurement network to source tested surplus, refurbished, and new-old-stock (NOS) SNAT modules. All units are sourced from decommissioned drive systems, authorized distributor overstock, and controlled industrial auctions. DriveKNMS provides lifecycle extension support including: board-level repair for common failure modes (capacitor degradation, IGBT driver IC failure, corrosion on edge connectors), functional testing against ABB factory test parameters, and long-term storage with anti-static and humidity-controlled packaging. For facilities operating SNAT-based drives beyond their original design life, DriveKNMS offers a standing purchase order program to reserve critical spare modules against future demand.

Quality Control for the SNAT Series Range

SNAT series boards present specific quality control challenges due to their complex backplane bus architecture and multi-layer PCB construction. DriveKNMS applies the following test protocol to all SNAT modules prior to shipment: (1) Visual inspection under 10x magnification for PCB trace damage, solder joint integrity, and component condition. (2) In-circuit test (ICT) for passive component values and continuity across all bus lines. (3) Functional power-on test using ABB-compatible drive test bench, verifying correct voltage rail output, communication handshake with NAMC/NDIO counterpart boards, and absence of fault codes. (4) DDCS fiber-optic link verification for communication boards. (5) Burn-in test at elevated ambient temperature (40°C, 4 hours minimum) to screen for latent thermal failures. Each board ships with a test report and 12-month warranty against defects in materials and workmanship.