FANUC AiSV Series Servo Amplifier Modules

Technical Dossier

Product Details And Specifications

FANUC AiSV Series: Comprehensive Module Range and Technical Overview

The FANUC Alpha i SV (AiSV) series servo amplifier modules represent one of the most widely deployed drive platforms in global heavy industry. Installed across petrochemical complexes, nuclear power auxiliary systems, offshore drilling rigs, and continuous-process refineries, the AiSV line is the standard servo drive backbone for FANUC 30i, 31i, 32i, 0i-D, and 0i-F CNC controller platforms. Its modular SVM (Servo Module) architecture allows multi-axis configurations within a single cabinet footprint, reducing wiring complexity and enabling centralized fault diagnostics via FANUC FSSB (Fiber-optic Servo Serial Bus). The series spans current ratings from 20A to 360A peak, covering the full spectrum from precision finishing axes to heavy-duty gantry and spindle applications in steel mills and large-format machining centers.

The Evolution of AiSV Architecture

FANUC's servo amplifier lineage progressed through several distinct generations before arriving at the AiSV platform. The original Alpha series (A06B-6079/6080/6096 family) used analog command interfaces and discrete transistor output stages. The Alpha i series introduced FSSB digital fiber-optic communication, eliminating analog noise susceptibility and enabling deterministic real-time axis synchronization. The AiSV (SVM) modules replaced the earlier SVM1/SVM2/SVM3 discrete-axis units with a unified bus-connected architecture where multiple axes share a common DC link, improving energy efficiency through regenerative power sharing between axes.

The AiSV series is fully compatible with FANUC PSM (Power Supply Module) units of the A06B-6110 and A06B-6150 families, and interfaces directly with FANUC CNC controllers via the JX1B FSSB connector. Backward compatibility with earlier Alpha i SVM modules is maintained at the mechanical and electrical interface level, though firmware versions must be matched to the CNC software release. As of 2024, the AiSV series has entered the mature/sustained phase of its lifecycle; FANUC continues to manufacture and support these modules, but the next-generation AiSP (Servo Pack) platform is positioned as the long-term successor for new machine builds. For existing installations, DriveKNMS provides lifecycle extension support including tested surplus, refurbished exchange, and repair services.

AiSV Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed models within the FANUC AiSV (Alpha i SV) servo amplifier series. Units are classified by axis configuration and current rating.

Single-Axis SVM Units

• A06B-6240-H201: AiSV 4/4 — Single-axis SVM, 4A continuous, low-inertia small-servo applications
• A06B-6240-H202: AiSV 10/10 — Single-axis SVM, 10A continuous, standard machining center auxiliary axes
• A06B-6240-H203: AiSV 20/20 — Single-axis SVM, 20A continuous, mid-range feed axis drive
• A06B-6240-H204: AiSV 40/40 — Single-axis SVM, 40A continuous, heavy feed axis and rotary table drive
• A06B-6240-H205: AiSV 80/80 — Single-axis SVM, 80A continuous, large-format machining and gantry axis
• A06B-6240-H206: AiSV 160/160 — Single-axis SVM, 160A continuous, heavy-duty spindle and large servo axis
• A06B-6240-H207: AiSV 360/360 — Single-axis SVM, 360A continuous, maximum-current heavy industrial axis

Dual-Axis SVM Units

• A06B-6240-H208: AiSV 20/20 Dual — Two-axis SVM, 20A per axis, compact dual-axis cabinet solution
• A06B-6240-H209: AiSV 80/80 Dual — Two-axis SVM, 80A per axis, high-current dual-axis servo drive for large CNC machines
• A06B-6240-H210: AiSV 40/40 Dual — Two-axis SVM, 40A per axis, mid-range dual-axis configuration
• A06B-6240-H211: AiSV 160/160 Dual — Two-axis SVM, 160A per axis, heavy-duty dual-axis high-power drive

Three-Axis SVM Units

• A06B-6240-H220: AiSV 4/4/4 — Three-axis SVM, 4A per axis, compact three-axis solution for small machining centers
• A06B-6240-H221: AiSV 10/10/10 — Three-axis SVM, 10A per axis, standard three-axis CNC drive module
• A06B-6240-H222: AiSV 20/20/20 — Three-axis SVM, 20A per axis, mid-range three-axis integrated drive
• A06B-6240-H223: AiSV 40/40/40 — Three-axis SVM, 40A per axis, high-current three-axis module for large machining centers
• A06B-6240-H224: AiSV 80/80/80 — Three-axis SVM, 80A per axis, maximum three-axis configuration for heavy industrial CNC

Sourcing Hard-to-Find & Obsolete AiSV Parts

DriveKNMS maintains a dedicated inventory program for the FANUC AiSV series, with particular focus on dual-axis and three-axis high-current variants that are subject to long lead times from the OEM channel. Our sourcing protocol covers three supply tiers: (1) tested surplus stock from decommissioned production lines, (2) factory-refurbished exchange units with full functional verification, and (3) component-level repair for units with repairable fault codes (AL-9, AL-24, AL-401 series). For models confirmed as end-of-production by FANUC, DriveKNMS provides a minimum 12-month warranty on all refurbished units and maintains a cross-reference database linking legacy A06B-6096 and A06B-6114 series units to their AiSV functional equivalents to support upgrade projects.

Quality Control for the AiSV Range

FANUC AiSV modules present specific test challenges due to their integrated FSSB interface, shared DC bus architecture, and multi-axis IGBT output stages. DriveKNMS applies a structured test protocol for all AiSV units prior to dispatch. Each module undergoes DC bus capacitor ESR measurement and pre-charge circuit verification. IGBT gate drive integrity is confirmed under load using a calibrated motor simulator. FSSB communication is validated against a live FANUC 0i-F controller to confirm axis recognition, parameter read/write, and alarm-free initialization. For dual- and three-axis units such as the A06B-6240-H209, each axis channel is tested independently and simultaneously under rated current to confirm thermal management and inter-axis isolation. Final burn-in is conducted at 80% rated load for a minimum of two hours before units are cleared for shipment.