FANUCA06B-6114-H103Alpha i Servo Amplifier Module SVM1-20i, Single Axis, 2.5 kW, 6.5 A, 283-339 V DC Bus, FSSB

Product Description

What this part is

Fanuc A06B-6114-H103 is the Alpha i series servo amplifier module SVM1-20i, also written αiSV 20. It is a single-axis servo amplifier. It takes DC from the drive rack’s common bus and inverts it into three-phase current to drive one Fanuc Alpha i servo motor, under position and velocity command from the CNC over the FSSB fibre link. It is an amplifier, not a power supply, and does not rectify mains.

Order code breakdown

A06B: Fanuc servo and spindle products. 6114: the Alpha i (αi) single-axis servo amplifier module family, the post-2004 i-series generation. H103: the size within that family, SVM1-20i. SVM1 denotes one axis. The 20 is the amplifier’s transistor-module rating in amps, not the output current and not the kW; continuous output is 6.5 A.

Published specifications

Model: Alpha i SVM1-20i (αiSV 20). Axes: 1 (single axis). Rated input: 283–339 V DC from the drive rack DC bus. Rated power: 2.5 kW. Maximum output voltage: 240 V AC. Rated continuous output current: 6.5 A (L axis). Transistor module: one 20 A module. Control interface: FSSB (Fanuc Serial Servo Bus). Servo control generation: HRV3. Cooling: internal cooling fan and heatsink. Module width: 60 mm, the narrowest module in the αi servo range. Approximate dimensions: 380 mm high x 60 mm wide x 172 mm deep. Approximate weight: 2.2 kg (4.8 lb).

Specifications in application

The 20 in SVM1-20i is the transistor rating and not the output amps. The rating that decides axis suitability is 6.5 A continuous and 2.5 kW. This is the smallest amplifier in the αi servo family, suited to a light or medium axis such as a tool changer, a B or C rotary axis, a tailstock, or a small X or Y on a compact machine.

The input is 283–339 V DC and not AC mains, so the module sits on a drive rack alongside an αi power supply module (the 6110-series αiPS) that rectifies the incoming three-phase supply and feeds the shared DC bus. Combinations of αi servo modules and αiSP spindle modules run from one or two power supplies sized for the total simultaneous demand.

Modules on this platform bolt side by side and the DC bus bars are cut to a specific arrangement, so the 60 mm width fixes the bus geometry in a cabinet retrofit.

Firmware and control compatibility

The 6114 αi servo modules are the post-2004 i-series generation and they interface over FSSB, so the CNC is an FSSB control: Series 0i-B and 0i-C, later 15i, 16i, 18i and 21i controls, and Fanuc robot controllers. An earlier non-FSSB Alpha system, the A06B-6079 generation, has a different servo interface and does not accept this module. This amplifier drives αi model servo motors from αi8/3000 and its high-speed variants.

What is included

Servo amplifier module only, as pictured. This listing does not include the αi power supply module (αiPS, 6110 series); spindle amplifier modules; DC bus link bars or bus connection kits; the FSSB optical fibre cable; motor power or encoder feedback cables; the connector kit; a braking resistor (the αi power supply is regenerative and does not normally use one); a rack, cabinet or mounting hardware; a servo motor; or documentation. An αi drive system is a power supply plus one or more amplifiers, and this is one amplifier.

Mounting data

Module width is 60 mm and depth is 172 mm, to which the ventilation clearance specified by Fanuc is added. Cooling is by internal fan and heatsink, with an overtemperature alarm on obstructed airflow. FSSB is a daisy chain, and the module’s position in the chain determines its axis assignment; the FSSB axis setting in the CNC parameters corresponds to the physical order.

Interchange guidance

A06B-6114-H103 is the SVM1-20i. Other H-numbers in the 6114 family are different current ratings and are not interchangeable. Multi-axis modules in the same generation, SVM2 and SVM3, serve two and three axes respectively and are a different physical item. The earlier A06B-6096 Alpha servo amplifiers are also an FSSB range, but they are the previous generation with different module hardware and parameters. The non-FSSB predecessor is the A06B-6079 range. Also searched as A06B6114H103, A06B 6114 H103, SVM1-20i, SVM1-20I, aiSV20, aiSV1-20, alpha i servo module 20, and GE Fanuc A06B-6114-H103. Sold as 1 piece.