Product Description:

The ACM-090-09 is a compact servo drive manufactured by Copley Controls for the Accelnet CANopen Modules series. It regulates brushless or brushed motors from a DC bus for use in industrial automation cells. The drive exchanges motion commands over the CANopen fieldbus, allowing distributed control of motor position, velocity, and torque.

During sustained operation, the drive delivers a continuous output current of 3 Adc, which corresponds to a continuous mechanical power capability of 0.27 kW when the motor voltage matches the bus. For rapid acceleration, it supplies a peak current of 9 Adc for 1 s before reverting to nominal limits; at that peak, the delivered electrical power reaches 0.81 kW. The internal control circuitry updates phase current at a 15 kHz rate, and this loop is synchronized with a PWM carrier of 15 kHz generated by the power MOSFET bridge. The operating voltage ranges from 20 Vdc to 90 Vdc, allowing the same module to run from low-voltage battery supplies or higher factory DC links. The bridge can issue pulses as short as 220 ns, supporting smooth torque production even when motor inductance is low.

The command interface supports several forms of input and output. An analog reference is accepted over a range of ±10 Vdc and buffered by a 5 kΩ input impedance that prevents loading of upstream controllers. For discrete signaling, the module provides 10 digital inputs and two digital outputs, allowing motion gating and limit-sensor monitoring without additional hardware. High-speed pulse streams are also supported: the step-and-direction port processes frequencies up to 2 MHz, while the position-velocity controller closes its loop at 3 kHz to translate those pulses into precise motion with minimal lag. These interface rates operate alongside the fast current-control layer to maintain coordinated response across the drive’s control functions.