Product Description:

The CB20561 is a digital servo drive manufactured by Kollmorgen as part of the CD Servostar CD Drives series. The unit belongs to the Compact Drive product family and serves as the power and control interface between a motion controller and a three-phase servomotor. In automated packaging lines, pick-and-place gantries, or indexing tables, the drive converts low-level motion commands into real-time current loops that keep the motor synchronized with commanded trajectories, enabling precise and repeatable positioning.

It is supplied from a three-phase 110 V per phase mains input and can deliver a continuous phase current of 20 A RMS per phase, giving it headroom for medium-torque servomotors. For analog command channels, the drive reads a ±10 VDC signal with 14-bit resolution, allowing fine velocity or torque reference scaling. Six digital inputs accept 24 V logic for limit or homing sensors, while the single digital output sources 60 mA to actuate indicators or external interlocks. A fault relay rated at 1 A at 24 VDC provides a hardwired alarm path for safety circuits. Real-time communication with upper-level controllers uses the SERCOS fiber-optic bus, and internal logic power is generated by an onboard supply so no auxiliary source is required. Sine encoder feedback maintains closed-loop accuracy during operation.

During acceleration, the drive can supply a peak output of 40 A RMS per phase, giving temporary torque boosts without entering thermal limits. Its position loop executes every 500 µs (2 kHz), so commanded trajectories drawn from any of the 16 stored motion profiles are followed with tight control. The built-in analog monitor port reports process variables with 4.9 mV/12-bit granularity, which supports clear signal observation. Velocity holds within 0.01% of the setpoint, and serial diagnostics display speed in 1 rpm increments for easier monitoring and troubleshooting.