Product Description:

The ACJ-055-18-S is a compact servo drive module produced by Copley Controls within the Accelnet CANopen Modules series. It interfaces with a CANopen network to regulate current, velocity, and position for brushed or brushless motors in industrial automation. By combining fieldbus motion commands with onboard current control, the module supplies regulated power to the motor phases while providing feedback channels for encoders and discrete I/O.

The power stage delivers a continuous output of 6 Adc, giving machines a steady torque source during normal duty cycles, while its peak capability of 18 Adc for one second supports rapid acceleration events. Thermal and magnetic stresses are controlled by a current loop that refreshes at 15 kHz, allowing the controller to react quickly to load changes. When operating at maximum output, the drive can deliver up to 970 W to the motor windings, so cabinet cooling must dissipate the resulting heat. Analog velocity feedback is accepted at a line frequency of up to 230 kHz, which accommodates high-resolution sine-cosine encoders used on fast rotary axes. Nine optically isolated digital inputs and four digital outputs integrate end-of-travel sensors, brakes, or system interlocks without external relays. The output transistors exhibit only 0.075 Ω of resistance, reducing conduction losses.

For finer position control, the internal interpolator multiplies encoder edges to 1024 counts/cycle, increasing resolution without requiring a higher track pitch. The module powers incremental or absolute feedback devices with a regulated 5 Vdc at 400 mA source, eliminating the need for separate power supplies. Motor windings must provide at least 200 µH of line-to-line inductance so the PWM output remains stable at its ripple frequency of 30 kHz. The housing measures 97.28 × 62.74 × 32.77 mm and weighs only 0.14 kg. Its compact dimensions enable direct mounting on distributed motion-control panels where installation space is limited.