Product Description:

The PC842-XYZ-N brushless servo drive is produced by Pacific Scientific as part of the PC800 – PCE800 Brushless Servo Drives series. It serves as the intermediary between a motion controller and a three-phase servomotor, converting low-level commands into precisely modulated current and voltage. Within factory automation cells, the unit’s closed-loop electronics maintain consistent motor speed, torque, and position so that packaging, pick-and-place, and material-handling axes follow program trajectories with minimal settling time.

The drive exchanges control data over a SERCOS Network, allowing deterministic fiber-optic communication at the same cycle rate as the axis update. When connected to a 240 VAC three-phase supply, it can deliver a continuous power of 1.1 kW and maintain a steady output of 2.7 ARMS. Pulse-width-modulated switching occurs at an output ripple frequency of 20 kHz, which keeps current ripple low and acoustic noise above the audible range. At power-up, the internal filter must absorb an inrush peak of 300 A for 1 ms, so upstream protection devices should be sized to withstand that short surge without nuisance tripping. The electronics reside in a housing that measures 198.1 mm in height, 88.1 mm in width, and 158 mm in depth, and the assembly weighs 1.9 kg, simplifying panel layout in multi-axis cabinets.

During rapid accelerations the amplifier can output up to 5.3 ARMS, supporting transient mechanical loads without speed loss, while its peak power capability reaches 2.25 kW. Thermal design keeps conduction losses low, yielding a power-stage efficiency of 98%; this reduces cabinet heat and lowers fan duty. Motor leads may run as far as 50 m when shielded cable with the specified inductance range of 4 mH to 4 H is used, allowing drives to remain in centralized enclosures even when servo axes are dispersed across a large machine frame.