Product Description:

The R22-055-18 is a compact DC servo drive module produced by Copley Controls for the Accelnet CANopen Modules series. It is intended to regulate torque, velocity, or position in distributed industrial automation axes. Commands and feedback are exchanged over a CANopen fieldbus while the module delivers controlled current to a matched motor.

The drive accepts analog reference signals through an input impedance of 5 kΩ, preventing loading of upstream controllers. During steady operation, it can source 6 Adc, translating to a continuous mechanical output of 0.33 kW. A current-loop update interval of 15 kHz modulates the motor phase current, while the position and velocity regulators close at a lower rate to maintain tracking accuracy. Ten opto-isolated digital inputs, highlighted by the value 10, allow mode selection, limit sensing, or homing. Two digital outputs report drive status to external interlocks. Pulse-width modulation is generated by the switching carrier and can shorten to a minimum pulse width of 220 ns; this short conduction window limits distortion and improves resolution at low duty cycles. A ripple component at 30 kHz is filtered by the motor’s inductance. The low-voltage bus may start at 20 Vdc, enabling operation from battery or low-power supplies.

For transient events, the high-voltage rail can climb to 55 Vdc, permitting a peak current of 18 Adc for up to 1 second and producing as much as 0.99 kW of mechanical power. This short-term reserve covers acceleration, deceleration, or shock loads that exceed the continuous ratings. After the 1-second peak interval, the drive returns the output to its continuous envelope to stay within thermal limits. The PWM ripple is filtered by the motor’s inductance, and the two digital outputs can flag any overcurrent or bus overvoltage conditions detected by the controller.