PCE845-XYZ-F Pacific Scientific
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The Pacific Scientific PCE845-XYZ-F is a servo drive in the PC800 - PCE800 Brushless Servo Drives series, offering continuous output power of 5.6 kW at 480 Vac and a continuous output current of 7.5 ARMS. This model features a peak output current of 22.5 ARMS and has a power stage efficiency of 97 percent. The command interface uses the SERCOS option, and its internal regen resistance is 33 Ohms.
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Product Description:
The PCE845-XYZ-F is a brushless servo drive manufactured by Pacific Scientific for the PC800 and PCE800 Brushless Servo Drives series. Acting as the power amplifier in an industrial motion loop, it converts incoming three-phase mains power into a regulated PWM output that controls motor torque, speed, and position. Through its SERCOS network option, the drive exchanges deterministic setpoints and status data with PLCs or motion controllers to support coordinated motion on multi-axis production equipment. This role places the unit between the machine control system and the servo motor, where fast current regulation is needed for repeatable axis response.
With a 480 VAC supply, the drive can deliver continuous shaft power of 5.6 kW, which corresponds to a sustained output current of 7.5 ARMS when natural convection is adequate. With additional ducted cooling, the continuous capability rises to 11.25 ARMS, allowing higher thermal loading during extended operation. Peak demand is covered by a momentary output rating of 19.2 kW, and the output stage uses a 16 kHz switching pattern to help limit current ripple and reduce audible motor noise. The SERCOS command interface carries these operating values in standardized telegrams, while the incoming mains current remains at 11.0 ARMS during normal service.
During overload events, the power stage can source up to 22.5 ARMS with 31.8 A zero-to-peak for short bursts, and it operates at 97% efficiency so heat generation inside the cabinet stays relatively low. Initial energization draws an inrush current of 175 A for 1.5 ms before settling to normal operation, which is important for upstream protection devices and power distribution design. Regenerative braking energy up to 100 W is dissipated internally through a 33 Ω resistor, so light-axis applications do not require a separate external dump module. The output bridge also supports motor inductances up to 1.7 H, which allows compatibility with both low- and high-impedance windings while maintaining stable current-loop behavior.
Frequently Asked Questions about PCE845-XYZ-F:
Q: What type of command interface does the PCE845-XYZ-F use?
A: The PCE845-XYZ-F supports a SERCOS command interface for communication.
Q: What is the continuous output power of the PCE845-XYZ-F at 480 Vac?
A: This drive supplies a continuous output power of 5.6 kW at 480 Vac.
Q: What is the peak output current capacity of the PCE845-XYZ-F?
A: Peak output current for the PCE845-XYZ-F is rated at 22.5 ARMS.
Q: What is the power stage efficiency of the PCE845-XYZ-F servo drive?
A: The power stage on the PCE845-XYZ-F achieves an efficiency of 97%.
Q: What are the internal regenerative power and resistance values of the PCE845-XYZ-F?
A: Internal regenerative power for this model is specified at 100 W with a regen resistance of 33 Ω.
