AEM-180-20 Copley Controls
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The Copley Controls AEM-180-20 is part of the Accelnet CanOPEN Modules series. This module supports a continuous current of 10 Adc and a peak current of 20 Adc, with a voltage range from 40 to 180 Vdc. It operates with a current loop bandwidth of 2.5 kHz and provides 11 digital inputs and 6 digital outputs.
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Product Description:
The AEM-180-20 is a panel-mount servo drive manufactured by Copley Controls within the Accelnet CANopen Modules series. It interfaces with fieldbus controllers to regulate brushless or brushed motors in industrial automation systems. The power stage converts DC bus power into pulse-width modulated output current for the connected motor. Integrated feedback loops support precise torque, velocity, and position control during coordinated machine motion.
The drive operates from 40 V DC up to 180 V DC, providing flexibility when matching it to rectified mains or battery sources. Under continuous loading, it supplies 10 A DC, or 7.1 A RMS, which supports midsize rotary stages and other controlled axes. It can also deliver 20 A DC, or 14 A RMS, for one second to accelerate inertial loads. A current-loop bandwidth of 2.5 kHz allows the amplifier to track rapidly changing torque commands. The embedded control core updates that loop at 16 kHz, which also serves as the PWM carrier frequency and helps minimize phase lag between drive output and motor response. Current regulation remains stable when the motor phase inductance is at least 200 µH. A secondary ripple frequency of 32 kHz indicates the differential sideband present at the motor terminals and can be considered when planning electromagnetic interference filtering.
The velocity and position control loop operates at 4 kHz, supporting tight following-error limits in synchronized multi-axis systems. Command scaling is supported by a 12-bit differential analog input that accepts ±10 V references for stand-alone operation. The interface provides 11 opto-isolated input channels for edge-triggered functions such as limit sensing, homing, and external control commands. It also includes 6 sourcing outputs for functions such as brake release, drive-ready indication, and fault signaling. These isolated input and output channels allow the drive to exchange control states with surrounding automation equipment while separating sensitive control electronics from external wiring conditions.
