PCE845-XYZ-T Pacific Scientific
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The Pacific Scientific PCE845-XYZ-T is part of the PC800 - PCE800 Brushless Servo Drives series and features a continuous output power of 5.6 kW at 480 Vac with a continuous output current of 7.5 ARMS. This servo drive uses a SERCOS command interface, supports a maximum motor cable length of 50 meters, and operates with a power stage efficiency of 97 percent.
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Product Description:
The PCE845-XYZ-T is a brushless servo drive manufactured by Pacific Scientific within the PC800–PCE800 Brushless Servo Drives series. Designed to regulate torque and speed in industrial automation, the unit converts three-phase mains power into controlled current for compatible permanent-magnet motors. By integrating the power stage, shunt regulator, and a digital motion network into one package, it provides closed-loop control that matches dynamic machine requirements such as packaging axes, pick-and-place gantries, and material handling systems. This integrated arrangement also reduces the need for separate external control hardware and helps keep cabinet layouts more compact.
The drive can deliver a continuous phase current of 7.5 ARMS, while short load transients are handled by its peak rating of 22.5 ARMS. With a 480 VAC supply, the converter sustains 5.6 kW of mechanical output, helping midsize servomotors maintain torque without thermal derating. Its DC bus can absorb 70 J of returned energy before the shunt circuit switches, and the switching devices operate at a 16 kHz current-ripple frequency to reduce audible noise. Plant efficiency is supported by a 97% power stage efficiency and an RMS line draw of 11.0 ARMS. The current regulator is tuned for motors whose inductance falls between 1.7 mH and 1.7 H, allowing stable operation across a wide motor range. This makes the unit suitable for applications that alternate between steady-speed running and frequent acceleration changes.
Startup surges are managed by an inrush limiter that caps the first line cycle at 175 A, protecting upstream breakers. During overhauling moves, the internal resistor dissipates 100 W, while higher energy cycles can connect to a panel-mounted module rated for 400 W. Both sink power through a 33 Ω path that works with a shunt regulator capable of 20 kW peak. Real-time motion commands arrive over the SERCOS fiber ring, and feedback reaches the drive through motor leads up to 50 m long without exceeding cable-loss limits. This communication arrangement supports precise synchronization between the controller and motor during coordinated motion.
Frequently Asked Questions about PCE845-XYZ-T:
Q: What is the continuous output current rating of the PCE845-XYZ-T drive?
A: The PCE845-XYZ-T servo drive supports a continuous output current of 7.5 ARMS for sustained operation.
Q: What type of command interface is available on the PCE845-XYZ-T?
A: This drive features a SERCOS command interface for digital motion control communication.
Q: What is the power stage efficiency of the Pacific Scientific PCE845-XYZ-T?
A: The PCE845-XYZ-T achieves a power stage efficiency of 97%, minimizing energy losses during operation.
Q: What is the maximum supported motor cable length on the PCE845-XYZ-T?
A: The maximum allowable motor cable length for this drive is 50 meters.
Q: How much internal regen power does the PCE845-XYZ-T provide?
A: The internal regeneration capability of the unit provides up to 100 W for braking energy dissipation.
