Product Description:

The SCE904-001-01A is a servo drive manufactured by Pacific Scientific and assigned to the SCE900 Servo Drives series. It accepts differential analog velocity or torque commands, conditions encoder feedback, and modulates its inverter stage to control brushless servomotors used on pick-and-place gantries, packaging axes, and other automated machinery that demand precise position and speed regulation.

The current regulator can deliver a continuous phase output of 7.50 Arms, allowing the drive to support moderate-frame motors without overheating. Under a 25 °C ambient, the power section sustains 5 kVA of continuous apparent power, while a bipolar command window of ±10 V matches common motion controllers. For high-resolution commutation, the incremental encoder interface passes signals at up to 833 kHz. Resulting position feedback is maintained within ±5.3 arcmin, and the closed-loop position calculator refreshes every 1 ms. The internal current sensors share a 7 Ω NTC network for temperature tracking, and the output stage chops at 20 kHz to minimize audible noise and torque ripple. Velocity data are filtered to 0.014 rpm resolution, and the IP20 housing directs users to mount the unit inside a protected cabinet.

For transient events such as rapid indexing or acceleration of larger inertias, the inverter can supply a peak phase current of 21.2 A and produce up to 10 kVA of apparent power from a 400 VAC bus. Excess kinetic energy is returned to the DC link where a braking resistor can absorb as much as 16 kW of regenerative power. The velocity loop operates on a 250 µs update to coordinate with the faster current loop, and motion feedback granularity down to 0.014 rpm supports low-speed creeping moves without cogging. A 6.6 kg mass eases panel installation, and the 20 kHz switching strategy keeps conducted ripple inside the specified 833 kHz encoder bandwidth.