7225AC Copley Controls
Wake Industrial LLC is not an authorized distributor of this product.
MPN: 800-1466
The Copley Controls 7225AC is a DC servo amplifier from the DC Servo Amplifiers series, with a continuous current rating of 10 Amps and a peak current of 20 Amps for up to 2 seconds. It features a ±10V analog U-V command input and operates with a PWM frequency of 25 kHz. The amplifier includes overvoltage shutdown at 195 VDC and undervoltage shutdown at 45 VDC.
Internal Product Review
The 7225AC is a Copley Controls DC servo amplifier with a ±10 V analog command input and 25 kHz PWM frequency. A 10 A continuous current rating supports confident operation under sustained demand. A 20 A peak current for 2 s adds valuable overload capacity, a key strength for dynamic servo duty.
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Product Description:
The 7225AC is a DC servo amplifier from Copley Controls that belongs to the DC Servo Amplifiers series. It accepts a ±10 V analog command and modulates motor current for torque or velocity control loops in industrial automation. Its pulse-width modulation output stage supplies regulated current to brushed or brushless DC motors used on pick-and-place axes, material-handling gantries, and precision conveyors. The amplifier responds to analog commands while coordinating its enable input and protective circuits with the connected machine controls.
The power section can supply a continuous motor current of 10 A and reach a peak current of 20 A for up to 2 seconds during acceleration. A switching rate of 25 kHz minimizes audible noise and smooths current ripple, while the small-signal response has a -3 dB bandwidth of 3 kHz for closed-loop operation. Command changes are processed quickly, and the enable line releases the drive within 1 ms to support rapid machine startup. The input stage uses a logic threshold of 2.5 V, and a 2 A/V current-monitor output provides an analog signal for drive diagnostics. The electrical design draws 16 A from the supply and limits inrush current to 19 A while the internal capacitors charge. The output transistors have an on-resistance of 0.2 Ω, which reduces conduction losses during motor operation.
Protective functions shut down the amplifier if the bus voltage rises to 195 VDC or falls below 45 VDC, guarding the power stage against line surges and brownouts. An over-temperature latch activates at 70 °C, so forced airflow or a suitable heat sink must keep the chassis below this temperature during operation. The current loop requires at least 400 µH of motor or filter inductance to prevent excessive current ripple and high-frequency oscillation. When the enable input is deasserted, the output stage turns off promptly without continuing to energize the motor. Protective circuitry also inhibits the output while a voltage or temperature fault remains active. Normal operation can resume after the applicable bus voltage and chassis temperature return to acceptable levels.
