FANUC A06B-6240-H209 Servo Amplifier 22.5A

A06B-6240-H209 FANUC Dual-Axis Servo Amplifier

Product Introduction

The FANUC A06B-6240-H209 servo amplifier module brings dual-axis control into a single compact housing. This design saves valuable cabinet space while reducing wiring complexity compared to using two separate single-axis drives. Specifically, this module powers both the L‑axis and M‑axis motors, each receiving a rated output current of 22.5 A.

This servo amplifier accepts a DC input voltage between 283 and 339 VDC, typically supplied by a FANUC power supply unit like the A06B-6087 series. At 283 VDC, the rated input current reaches 39 A. The module then inverts this DC power into three-phase AC output ranging from 200 to 240 VAC. Moreover, the output frequency spans from 0 up to 550 Hz, enabling high-speed spindle or rapid-traverse motions.

Furthermore, the A06B-6240-H209 operates within an ambient temperature range of 0°C to 55°C. This thermal tolerance ensures reliable performance even inside enclosed cabinets with moderate heat buildup. Weighing only 6.80 kg, this servo drive remains easy to handle during installation or replacement, yet its construction withstands the vibration typical of milling and turning centers.

Another key advantage involves its dual-axis architecture. For instance, a single FANUC A06B-6240-H209 can control both the X and Y axes on a small machining center, or simultaneously drive a main spindle and a turret indexer. Consequently, system integrators achieve higher axis density per rack slot, which lowers overall system costs.

Technical Specifications (Electrical)

• Manufacturer: FANUC

• Part Number: A06B-6240-H209

• Number of Phases (Output): 3‑phase

• Input Voltage: 283–339 VDC

• Rated Input Current: 39 A (at 283 VDC)

• Output Voltage: 200–240 VAC

• Rated Output Current (L‑axis): 22.5 A

• Rated Output Current (M‑axis): 22.5 A

• Output Frequency Range: 0 – 550 Hz

• Input Frequency (AC supply): 50/60 Hz (via external power supply)

This module uses IGBT-based PWM technology for smooth current control. Additionally, it includes built-in overcurrent and short-circuit protection on each axis. When paired with FANUC's high-resolution serial encoders, the servo amplifier delivers exceptional positioning accuracy, often within a few microns.

Mechanical & Environmental Parameters

• Weight: 6.80 kg (15.00 lbs)

• Ambient Operating Temperature: 0°C to 55°C

• Storage Temperature: –20°C to 60°C (typical)

• Humidity: ≤90% RH (non‑condensing)

• Cooling: Forced air (internal fan)

• Mounting: Vertical rack or panel mount

The forced-air cooling system maintains junction temperatures within safe limits even during continuous high-torque operations. Meanwhile, the compact footprint—approximately 280 mm wide and 180 mm deep—allows dense packing in standard 19‑inch racks. Regular inspection of the cooling fan is recommended every 6 months to prevent overheating.

Installation Guidelines

Proper mounting of the FANUC A06B-6240-H209 begins with selecting a vertical orientation. Use M5 screws through the four mounting holes, ensuring the unit sits flush against the backplate for optimal heat dissipation. Next, connect the DC bus lines from the power supply to the P and N terminals, observing correct polarity—reverse connection will instantly damage the internal capacitors.

For motor connections, wire the U, V, and W terminals of each axis to the corresponding motor phases. Additionally, attach the encoder feedback cables to the CN2 (L‑axis) and CN3 (M‑axis) ports. Shield these feedback lines properly, as the high-frequency PWM output can induce noise into unshielded cables. Separate power and signal wiring by at least 150 mm to maintain signal integrity.

Step‑by‑step checklist:

1. Mount the unit vertically with sufficient clearance (≥120 mm top/bottom).

2. Connect DC input to P and N (torque to 1.2 N·m).

3. Wire motor outputs for both axes, phase order matching motor leads.

4. Plug encoder cables and secure with locking screws.

5. Ground the frame terminal to the cabinet earth bar.

Packaging & Shipping Information

Each servo amplifier module comes in a custom corrugated carton with anti-static bubble wrap. The package contains:

• A06B-6240-H209 amplifier unit (1 pc)

• Terminal cover and mounting screws

• Encoder cable clips (2 sets)

• Installation notes (quick reference)

• Protective dust caps for unused ports

Note: Motor cables, brake resistors, and interface adapters are not included.
All orders are shipped via FedEx, UPS, or DHL with real-time tracking. Delivery usually takes 3–8 business days, depending on the destination country.

Frequently Asked Questions (FAQ)

Q1: Can the A06B-6240-H209 run a single motor only?
Yes, you can leave one axis unconnected. However, the servo drive is optimized for dual‑motor use. For single‑axis applications, consider disabling the unused axis via parameter settings to avoid nuisance alarms.

Q2: What is the maximum cable length for motor power leads?
Keep each motor cable under 20 meters. Longer runs may cause voltage drops and reflected wave issues. For extensions beyond 20 m, add output reactors specifically rated for this FANUC amplifier.

Q3: Does this module support absolute or incremental encoders?
The A06B-6240-H209 works with FANUC's serial absolute encoders (type A or B). Incremental encoders require additional interface boards because the module expects serial data protocols.

Q4: How do I clear a "PSM" alarm on this unit?
First, power down the entire cabinet and wait 5 minutes. Then check the DC bus voltage—it should read between 280–340 V. If voltage is normal, reset the alarm through the CNC diagnostic screen. Persistent alarms may indicate internal IGBT failure.

Q5: Is this module compatible with non‑FANUC controllers?
While primarily designed for FANUC CNCs, the servo amplifier can accept analog ±10V torque commands from third‑party motion controllers. Nevertheless, full parameter access and tuning functions are only available through FANUC's proprietary software.