BP2-090-20 Copley Controls
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The BP2-090-20 is a motion control module from Copley Controls, part of the Accelnet CanOPEN Modules series. It operates with a max input voltage of 90 Vdc and supports a continuous current of 10 Amps per phase, with a peak current of 20 Amps. The module features 18 digital inputs and an analog input range of ±10 Vdc with 12-bit resolution.
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Product Description:
The BP2-090-20 is a compact servo drive module manufactured by Copley Controls and included in the Accelnet CANopen Modules series. It accepts a direct-current bus and produces pulse-width-modulated phase currents for brushless or brushed motors. In distributed automation systems, the drive executes its own current, velocity, and position control loops while exchanging real-time data on a CANopen fieldbus, reducing wiring and cycle-time demands on the central controller. Its rating and signal interfaces suit mid-power axes in pick-and-place gantries, conveyors, and electronic assembly tools.
Power handling parameters define the working envelope of the drive. The DC bus may vary from +14 Vdc to +90 Vdc, letting the same module run from low-voltage supplies or higher-energy storage banks. The continuous phase output is 10 Adc per phase, sufficient for moderate torque loads, while a short-term 20 Adc peak is available for acceleration bursts up to 1 s. The ±10 Vdc analog reference port with 12-bit resolution allows stand-alone torque or velocity control without a network interface. A minimum load inductance of 200 µH protects the power stage against excessive di/dt. Motion commands arrive over CANopen or as 2 MHz step-and-direction pulses, and the internal position loop runs at 4 kHz to track them. The quadrature decoder accepts rates up to 20 Mcounts/s, supporting high-resolution encoders.
The control loops execute quickly. The current regulator updates every 16 kHz, so torque commands settle within a few PWM periods. Up to 18 opto-isolated digital inputs can start homing, select motion profiles, or read limit switches without additional logic. Incremental encoders with signals up to 5 MHz line frequency feed directly into the decoder, and the gate drive can generate PWM edges as narrow as 220 ns, enabling fine duty-cycle resolution even at full current. Combined with the 2 MHz step interface and the 200 µH inductance floor, these timings maintain stable operation on demanding, high-bandwidth motion axes.
