FANUC A06B-6079-H208
1. Product Overview
The A06B-6079-H208 is a dual-axis integrated Alpha servo amplifier module, designated SVM2-80/80, developed by FANUC for classic 0i, 16i, 18i, 21i series CNC systems. This compact shared DC bus servo unit drives two independent servo axes simultaneously, compatible with FANUC α / αM series 200V AC servo motors. It adopts FSSB high-speed fiber-optic CNC communication, digital vector control algorithm and forced air cooling structure, delivering high-speed, high-torque, high-precision closed-loop motion control for CNC lathes, machining centers and mold processing equipment. Manufactured in Japan with industrial-grade anti-interference design, it is a mainstream dual-axis drive module for medium-to-high power CNC machine tools.
2. Core Electrical Technical Specifications
DC Bus Input Parameters
- Rated DC Input Voltage: 283–325 VDC (supplied by FANUC power supply module)
- Total Input Power Capacity: 9.5 kW
- Max Output AC Voltage per Axis: 230 VAC three-phase
Dual-Axis Output Ratings (L Axis / M Axis, Identical Performance)
- Continuous Rated Output Current: 18.7 A per axis
- Peak Overload Current: Supports 300% short-time overload for rapid acceleration/deceleration
- Supported Motor Power: Matches α series servo motors up to 7.5 kW per axis
Communication & Feedback Interface
- CNC Bus: FSSB (FANUC Serial Servo Bus) fiber optic communication port (CX5X/CX5Y)
- Encoder Interface: Standard pulse coder connectors for incremental / absolute encoders
- I/O Terminals: External overtravel limit, brake control, alarm output signal terminals
Mechanical & Environmental Data
- Cooling Mode: Built-in cooling fan forced air cooling
- Net Weight: Approx. 6.8 kg
- Protection Class: IP20 (cabinet internal installation only)
- Operating Ambient Temperature: 0°C ~ +55°C
- Storage Temperature: -20°C ~ +70°C
- Humidity: 5%–90% RH, non-condensing
- Vibration Resistance: 10–150 Hz, 0.5G continuous vibration
- Certifications: CE, UL, Japanese industrial safety certification
- Reference Manual: B-65162 (Alpha Servo Amplifier Operation Manual)
3. Key Product Features
3.1 Dual-Axis Integrated Compact Design
Two independent servo power circuits integrated into one single module, sharing a common DC bus. Reduces cabinet installation space, cuts wiring quantity and lowers overall equipment cost compared to two separate single-axis drives. Standard vertical rack mounting fits standard CNC electrical cabinets seamlessly.
3.2 FSSB High-Speed Fiber Communication
Fiber-optic FSSB bus realizes microsecond-level synchronous linkage between CNC controller and servo axes, eliminates electromagnetic interference from long copper cables, ensures stable multi-axis interpolation precision for mold contouring, high-speed milling and turning.
3.3 Full Compatibility with Alpha Servo Motors
Native drive support for FANUC α, αM, αC series 200V servo motors; works with both incremental pulse coders and absolute encoders. Absolute encoder configuration cancels mandatory axis homing after power-off, improving machine startup efficiency.
3.4 High Dynamic Performance Control Algorithm
Digital three-loop (position / speed / current) closed-loop control; built-in resonance suppression filter, low-speed torque compensation function. Maintains stable constant torque output at ultra-low speed, effectively eliminates tool vibration during fine finishing processing.
3.5 Comprehensive Multi-Layer Fault Protection System
Built-in hardware and software safety interlock functions:
- Overcurrent, short-circuit, overvoltage, undervoltage protection
- Overheat fan failure detection, motor overload thermal protection
- Encoder communication loss, axis overtravel alarm, DC bus abnormal monitoring
Front-panel digital 7-segment LED displays real-time fault codes for rapid on-site troubleshooting.
3.6 Durable Industrial Reliability
Aluminum alloy heat sink with large heat dissipation area and high-reliability cooling fan; anti-corrosion internal circuit coating, strong resistance to oil mist, dust and workshop electromagnetic interference. Supports 24-hour non-stop continuous heavy-load operation.
4. Main Industrial Application Scenarios
1. CNC Machining Equipment: Vertical machining centers, horizontal lathes, mold engraving and milling machines
2. Precision Metal Cutting: Turning centers, composite turning-milling machines, drill-tap centers
3. Automated Production Machinery: Multi-axis gantry feeding equipment, fixture positioning servo axes
4. Imported Brand Machine Tools: Mori Seiki, Dainichi and other Japanese medium-size CNC machine tools original matching drive module
5. Matching Supporting Components
Compatible CNC Controllers
FANUC 0i-MA/TA, 16i-MA/TA, 18i-MB/TB, 21i-MB series CNC systems
Matching Servo Motors
FANUC α0.5i, α1i, α2i, α3i, α6i, α8i, αM series 200V AC servo motors
Supporting Power Supply Module
A06B-6087-H series Alpha power supply unit (provides shared 283–325VDC bus power)
Connection Accessories
- FSSB fiber optic cables (A66L-6001 series)
- Motor power cables & encoder feedback cables (FANUC standard servo wiring harness)
Model Code Decoding
- A06B: FANUC servo drive & power module product prefix
- 6079: Alpha dual-axis servo amplifier series code
- H: Servo amplifier unit classification code
- 208: Model specification = SVM2-80/80 dual-axis module, 18.7A rated current per axis
On Jul 7, 2026 at 02:51:17 PDT, seller added the following information: