A06B-6093-H113 FANUC AC Servo Amplifier Unit A06B6093H113 A06B-6093-H113

FANUC A06B-6093-H113 — Beta SVU-40, FSSB Interface Single-Axis Servo Drive

There are two questions a maintenance engineer asks when a beta servo unit fails: "What is the interface?" and "What is the current rating?" Get either one wrong and the replacement unit won't work, no matter how fast it ships. For the A06B-6093-H113, the answers are FSSB and 40-class (12.5A rated output) — and both of those details carry real consequences for what this unit is, how it communicates, and which motors it can drive.

Sande Electric stocks the A06B-6093-H113 in new and inspected-used condition, with worldwide dispatch in 0–3 working days.

What Makes This Unit Different: FSSB in a Standalone SVU

To understand the A06B-6093-H113's place in the FANUC ecosystem, it helps to think about two axes of variation in beta servo drives: the power architecture and the communication interface.

On the power side, FANUC beta servo units (SVU) are standalone — each unit has its own internal power supply, converting incoming AC to the DC it needs for the drive output. This is the defining structural difference between a beta SVU and an alpha SVM module. Alpha SVM modules draw DC power from a shared supply module mounted in the same drive bus; if that supply fails, every module on the bus goes down together. The SVU carries its own supply, so it can be mounted independently, anywhere on the machine where AC power is accessible. This is why beta SVUs are the standard choice for axes that live physically apart from the main drive cabinet — automatic tool changers, rotary tooling stations, or secondary positioning axes on large machine tools.

On the communication side, FANUC offers two different interface options within the 6093 SVU series. The H15x and H17x sub-families use I/O Link, connecting to the CNC via the PMM and an electrical serial cable. The H11x sub-family — including this H113 — uses FSSB: the Fiber Optic Serial Servo Bus, the same high-speed optical interface used in FANUC's alpha series servo modules. The physical connection is via TOCP200 optical fiber, not an electrical data cable.

The A06B-6093-H113 is therefore the intersection of two properties that don't always appear together: the locational freedom of a standalone SVU, and the high-speed fiber optic precision of FSSB servo communication. For machine tool builders running FSSB-based CNC systems who also needed to position an axis away from the main drive stack, this SVU-40 was the solution.

The SVU-40 in the 6093 FSSB Current Range

Within the H11x FSSB sub-family of the 6093 series, FANUC produced four current ratings:

• H111 — SVU-4 (smallest, for lightest beta motors)
• H112 — SVU-12 (mid-low range)
• H113 — SVU-40 (mid-high range, 12.5A rated output)
• H114 — SVU-80 (highest current, 15A rated output)

The H113 SVU-40 sits at the upper-mid position, sized for beta motors in the 40-class: the b4/3000, b8/2000, and similar motors that appear on heavier auxiliary axes — larger rotary tables, heavier ATC mechanisms, and secondary positioning axes on bigger machine tools. It is also listed as compatible with alpha motors in the 40-class range (α4/4000i, α8/3000i) in mixed-motor configurations, which expands the range of machines where it sees use.

The suffix H113 in FANUC's numbering follows the convention: the first digit after H indicates the interface generation, and the subsequent digits indicate the current class. H113 means the 3rd unit in the H11x FSSB SVU family — which corresponds to the SVU-40 output tier.

Technical Specifications

H113 vs. H173: The FSSB and I/O Link Split in the 6093 Series

A common ordering error in the 6093 series is confusing the FSSB variants (H11x) with the I/O Link variants (H17x). Both are SVU-40 class units with built-in power supplies. Both are physically similar in size. The difference is the communication board and connector.

The H113 connects to the CNC via FSSB optical fiber. The H173 connects via I/O Link (electrical serial, through the PMM). These are not interchangeable. The CNC must be configured for one interface type, and the machine wiring routes the corresponding cable to the drive location. If your machine has an FSSB optical fiber cable routed to the drive mounting position, the replacement must be the H113 (or a compatible FSSB unit). Installing an I/O Link unit in that position will result in a communication fault immediately on power-up, regardless of all other parameters being correct.

Before ordering, check the drive label on the existing or removed unit, or inspect the connector for an optical fiber connection — this confirms FSSB and confirms that the H113 is the correct specification.

New and Used Stock: Practical Guidance

New-old-stock A06B-6093-H113 units are genuine FANUC product, unused, held in proper storage. These carry a 12-month warranty from our warehouse. For machines in high-production environments where reliability margin matters, new stock minimizes risk.

Used inspected units are sourced from decommissioned or upgraded machines and tested for functionality prior to sale. The SVU-40 is a single-axis unit driving a typically lower-duty auxiliary axis — large rotary tables or ATC mechanisms tend to cycle intermittently rather than continuously, which means the drive's power components are often in good condition even on units from older machines. Used stock carries a 3-month warranty and is a practical option for cost-sensitive repairs or backup inventory.

Contact us before ordering to confirm current availability on both conditions.

Ordering, Payment & Shipping

DHL and FedEx worldwide dispatch within 0–3 working days of confirmed payment. Combined shipping available on multiple items.

Payment options:

• Bank Transfer (T/T) — all order values
• PayPal — orders up to $500
• Western Union — all order values

Buyers are responsible for import duties and taxes applicable at the destination country.

Warranty & Returns

Returns are accepted where units arrive damaged, incomplete, not as described, or prove non-functional within 4 days of receipt. The unit must be returned in its original condition with the warranty label intact, and return shipping costs are the buyer's responsibility. Warranty does not extend to damage caused by incorrect installation, wrong motor or cable connections, or physical damage incurred after delivery.

Frequently Asked Questions

Q1: How do I confirm that A06B-6093-H113 is the correct unit for my machine, and not an I/O Link variant like the H173?

 Look at the existing drive's physical connection for the CNC interface cable. The FSSB connection uses optical fiber — a thin plastic or glass fiber cable terminating in a TOCP200-style connector. I/O Link uses a conventional electrical cable, typically with a smaller plug connector. If you can see the optical fiber going into the drive's JD1A or equivalent fiber port, the drive is FSSB and the H113 is the right family. Additionally, check the label on the existing unit directly — it will state SVU-40 FSSB or equivalent wording, and the part number H113 will be visible. If the original unit has already been removed and no documentation is available, check the machine's electrical schematic for the servo axis in question, which will identify the interface type in the wiring diagram.

Q2: The H113 is listed as SVU-40, but its rated output is only 12.5A — why is it called "40"?

The "40" in SVU-40 refers to FANUC's internal motor current class designation, not the absolute amperage number in all cases. In the 6093 series, the SVU-40 is rated to drive motors in FANUC's 40-class category, which includes motors like the b8/2000 and the alpha equivalent 40A-class motors. The 12.5A figure is the continuous RMS output current under normal operating conditions. Peak current during acceleration can be significantly higher than the continuous rating, which is the relevant figure for motor matching. The "40" classification covers this peak current capability for the motors in that class. The step up to SVU-80 (H114, 15A continuous) handles the heavier 80-class motors. Matching the drive to the motor by class designation, rather than only by continuous current, is the correct approach.

Q3: After installing a replacement H113, the CNC shows FSSB-related alarm 5134 or 460 on startup. What are the likely causes?

These alarms indicate that the FSSB communication between the CNC and the amplifier has not been established correctly. The most common causes in order of frequency are: first, the optical fiber cable not fully seated in the connector on the new unit — TOCP200 connectors require a positive click to seat, and a partially-inserted fiber will cause intermittent or complete loss of signal; second, the fiber cable itself having a bend radius violation introduced during installation, which attenuates the optical signal below the threshold for reliable communication; third, the amplifier's +24V DC control power not being present or being below threshold — check that the 24V supply to the unit is within specification before suspecting the fiber link. Alarm 5136 (number of amps is small) indicates the CNC is seeing fewer amplifiers on the FSSB chain than its configuration expects, which typically means the new unit is not responding at all — this points back to the fiber connection or control power.

Q4: Can the A06B-6093-H113 be used with alpha series motors, not just beta motors?

 Yes, with the appropriate motor parameter settings. The H113 SVU-40 is documented as compatible with alpha motors in the 40-class range, including α4/4000i and α8/3000i, when the CNC servo parameters are configured for those motor types. In practice, the 6093 SVU series was used by machine tool builders in mixed configurations where a beta SVU drove an alpha motor on an auxiliary axis — this was particularly common where the alpha motor was already installed on the machine for historical reasons but the machine's auxiliary axis architecture called for a standalone SVU drive. The critical requirement is that the motor's maximum current demand matches the drive's output class. Mismatching a heavier motor to a lighter-rated drive (or the reverse) will result in either overcurrent faults or underperformance.

Q5: Is there a direct replacement for the A06B-6093-H113, or is it completely discontinued with no newer equivalent?

The 6093 series has been discontinued by FANUC as a current production item. There is no drop-in newer equivalent that uses the same form factor, connectors, and parameter set — the successor generation, the 6114 series (SVM1-40i with FSSB), uses a different physical format and requires connection to a shared power supply rather than operating as a standalone SVU. For machines designed around the 6093 SVU architecture, sourcing the correct 6093 unit is the practical path for a like-for-like restoration. An upgrade to the 6114 generation would require replacing the power supply architecture for that axis, changing the drive mounting arrangement, and updating the CNC servo parameters — a significant project. For most maintenance scenarios, a tested used or new-old-stock H113 is the faster, more cost-effective, and less disruptive solution.

Contact for availability and pricing: Ms. Amy — sales01@sande-elec.com | Skype: sandesales01 | Tel: +86 18620505228