Product Description:

The PCE843-001-A is a brushless servo drive produced by Pacific Scientific for the PC800 – PCE800 Brushless Servo Drives series. In an automation cell it acts as the power conversion stage between a 480 VAC mains supply and a permanent-magnet servomotor, regulating current, velocity, and position under digital command. The module is intended for packaging, material-handling, and general motion axes that require mid-range power with fast torque response.

At the nominal bus voltage the drive delivers a continuous phase current of 3.75 ARMS, which equates to a sustained mechanical output of 2.6 kW. For dynamic moves it allows a peak phase output of 7.5 ARMS, while the internal half-bridge devices can momentarily pass 10.6 A zero-to-peak. This overload window supports up to 6.4 kW of short-term shaft power, making the unit suitable for indexing tables and rapid pick-and-place heads. Line conductors see 5.1 ARMS under rated load, so feeders and breakers can be sized accordingly. Energy conversion is aided by a power-stage efficiency of 97%, which limits wasted heat and allows dense cabinet layouts without extensive external cooling.

The fiber-optic SERCOS command interface provides deterministic motion control, and telegrams can be exchanged at rates to 16 MBaud for tight velocity loops. An auxiliary analog port accepts ±13 V reference signals, and a DAC channel returns ±5 V feedback for oscilloscope monitoring. Built-in digital logic includes a form-C relay capable of 1 A at 30 VDC for drive-ready contacts. Motor leads may extend to 50 m provided the connected servo has at least 5 mH of inductance to maintain current-loop stability. Carrier switching occurs at 16 kHz, so torque ripple and audible noise remain low. During rapid deceleration regenerated energy is routed to an internal resistor with a peak handling capacity of 10 kW, safeguarding the DC link and upstream supply.