Product Description:

The PC843-001-N is a brushless servo drive manufactured by Pacific Scientific within the PC800–PCE800 Brushless Servo Drives series. Designed for motion axes that require closed-loop velocity and position regulation, the unit supplies power to compatible low- and medium-inertia servomotors and relays feedback to a host controller. In industrial automation environments, it acts as the power stage between a motion controller and the motor, converting DC bus energy into precisely timed phase currents so that conveyors, pick-and-place machines, and packaging stations maintain repeatable profiles.

At the power stage, the drive can deliver a continuous output of 3.6 ARMS, while short transients are supported by a peak capability of 10.6 ARMS. The three-phase waveform is generated by pulse-width modulation at 20 kHz, a switching rate that reduces audible noise and allows fine current resolution. With a measured power stage efficiency of 98%, only minimal heat is produced, so most cabinet airflow can be reserved for other devices. The internal velocity regulator reaches a bandwidth of 400 Hz, enabling tight following of rapidly changing command profiles. It also supports motors with inductances from 2.0 mH up to 2 H, provides encoder output scaled to 16,384 PPR, and includes an isolated relay rated to switch 30 VDC at 1 A.

Integration into multi-axis systems is handled through the SERCOS Network fiber-optic interface, allowing deterministic communication without separate analog wiring. When power is first applied, the drive withstands an inrush of 300 A for approximately 1.5 ms, so Pacific Scientific recommends a 20 A, 250 V time-delay fuse on the AC line. The housing measures 158 mm in depth, stands 198.1 mm tall, and occupies only 88.1 mm of width on the DIN rail. Its compact form helps conserve panel space in multi-axis control cabinets.