Product Description:

The 800-1785A is a compact servo drive module manufactured by Copley Controls for the Accelnet CANopen Modules series. It regulates current and velocity in brushless or brushed servomotors and connects to the machine control layer through CANopen, enabling axis-level motion control inside industrial automation cells. By converting fieldbus commands into pulse-width-modulated power, the module serves as the local actuator interface that closes the current loop at high speed while the host PLC supervises overall motion profiles.

At the power stage, the drive supplies up to 3 A of continuous phase current and can surge to 9 A for short acceleration intervals, letting it energize low-inductance motors within thermal limits. The internal current loop operates at 15 kHz, and the resulting carrier keeps torque ripple outside the control bandwidth. With a peak output of 490 W, the amplifier suits small gantry, labeling, and semiconductor handling axes. The motion node attaches to a CANopen fieldbus and follows the DSP-402 device profile for standardized state control. Motor windings must present at least 200 µH of inductance so the regulator remains stable under its 220 ns minimum PWM pulse width.

For interface versatility, the analog command path presents an input impedance of 5 kΩ, allowing potentiometers or DACs to share the line without excess current draw. There are 9 optically isolated digital inputs for limit, home, or enable signals, and four transistor outputs provide status to external devices. Incremental position feedback arrives through digital Quad A/B encoder channels, while rotor commutation is handled by digital Hall sensors. During PWM synthesis, the switching pattern repeats at 30 kHz, shifting ripple energy beyond the audible range. Local setup and diagnostics are available through a RS-232 port, so parameters can be adjusted even when the network bus is offline.