GE A20B-1006-0110/03A Servo Amplifier

This servo amplifier drives AC servo motors with precise torque and speed control. It receives ±10 V analog commands from the CNC axis control module. You can install this unit inside the main machine control cabinet. The amplifier suits milling spindles, feed axes, and positioning tables.

Technical Specifications & Key Parameters

Parameter	Detail
Product Model	GE A20B-1006-0110/03A
Category	Servo Amplifier
Dimensions (H x W x D)	310 mm x 180 mm x 210 mm
Weight	5.8 kg (12.8 lbs)
Input Voltage	200–230 V AC, 3-phase, 50/60 Hz
Rated Output Current	15 A continuous, 45 A peak
Rated Power	4.0 kW continuous
Control Input	±10 V DC analog (differential)
Feedback Interface	Serial encoder port (20-pin)
Energy Storage	Two 4700 µF DC bus capacitors (9400 µF total)
Hold-up Time	25 ms at rated load
Switching Frequency	8 kHz IGBT PWM
Cooling Method	Built-in fan with forced air (85 CFM)
Protection Features	Overcurrent, overvoltage, undervoltage, overtemperature, short circuit
Status LEDs	Power, ready, run, fault, overload
Connector Types	One 20-pin command, one 20-pin encoder, one terminal block for motor

Detailed Feature Overview

GE A20B-1006-0110/03A delivers 4.0 kW of continuous power for servo motors. This amplifier provides 15 A continuously and 45 A during acceleration. Two large 4700 µF capacitors store 9400 µF of total energy on the DC bus. These capacitors maintain stable voltage during load transients. Consequently, the drive delivers consistent torque even under heavy cutting loads.

The amplifier accepts ±10 V analog commands from the CNC controller. A 20-pin serial encoder port provides closed-loop position feedback. The unit uses IGBT switching at 8 kHz for quiet motor operation. A built-in fan moves 85 cubic feet of air per minute. Therefore, the amplifier maintains safe temperatures during continuous high-power operation.

Protection and Diagnostic Features

Multiple protection circuits safeguard both the amplifier and motor. Overcurrent protection shuts down the output immediately during a short circuit. Overvoltage clamping prevents damage from regenerative braking energy. An overtemperature sensor reduces current if internal temperatures exceed 80°C. Five status LEDs provide clear visual feedback. For example, the FAULT LED illuminates for any protection event.

Installation and Cooling Requirements

The unit weighs 5.8 kg, requiring four M6 mounting bolts. Maintain 100 mm clearance above and below for proper airflow. The fan draws air from the bottom and exhausts from the top. Ambient temperature must stay between 0°C and 40°C. Keep humidity below 90% without condensation for reliable operation. Use 12 AWG wire for AC input connections. Use 16 AWG shielded wire for motor power and encoder feedback.