ACJ-090-12-S Copley Controls
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The Copley Controls ACJ-090-12-S is part of the Accelnet CanOPEN Modules series and supports a peak output power of 1600 W with a continuous output power of 533 W. The module features a current loop sample rate of 15 kHz and has an analog encoder maximum frequency of 230 kHz. Its compact size is 97.28 by 62.74 by 32.77 millimeters.
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Product Description:
The ACJ-090-12-S is a compact digital servo amplifier module produced by Copley Controls within the Accelnet CANopen Modules series. Designed for distributed motion systems, the unit connects to CANopen networks and converts DC bus power into precisely modulated phase currents for brushless, brushed, or stepper motors used in industrial automation equipment. By integrating control logic, feedback conditioning, and power electronics into an enclosure measuring 97.28 × 62.74 × 32.77 mm, the module reduces the required panel space while retaining deterministic motion control for positioning, velocity, and torque applications.
The power stage delivers a continuous output of 533 W and can provide up to 1600 W during short acceleration periods, allowing the drive to satisfy changing load demands. The current loop is updated at 15 kHz, while the pulse-width modulation ripple is centered at 30 kHz; these rates help minimize torque ripple and audible noise. An encoder interface accepts incremental feedback signals up to 230 kHz, and the built-in interpolator produces 1,024 counts per cycle so high-resolution position data reaches the controller. A minimum load inductance of 200 µH and an output resistance of 0.075 Ω support stable operation with a range of compatible motor windings. The feedback supply provides +5 V DC and up to 400 mA for connected encoders or other external feedback sensors.
The velocity and position loops execute at 3 kHz, allowing the module to react quickly to motion commands issued at a maximum digital step rate of 2 MHz. Protective logic disables the power stage if the heat sink temperature reaches 70 °C, if the bus voltage rises above 91 V DC, or if the voltage drops below 14 V DC. The overtemperature and voltage protections help prevent damage to power semiconductors during regenerative events, cooling problems, and low-voltage conditions. A pluggable interface carries CANopen communication signals alongside command inputs, reducing the amount of fixed wiring required in multi-axis machines and allowing the module to connect cleanly with distributed control equipment.
