CU834-002 Pacific Scientific
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The Pacific Scientific CU834-002 is a servo drive from the PC800 - PCE800 Brushless Servo Drives series. It delivers continuous output current of 7.1 ARMS and can supply a peak output current of 21.2 ARMS for 5 seconds. This drive supports command interfaces such as RS-232/485, ±10 Vdc, Step/Dir, and Indexing, and achieves a power stage efficiency of 98%.
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Product Description:
The CU834-002 is a brushless servo drive built by Pacific Scientific for the PC800 and PCE800 Brushless Servo Drives series. It functions as the power and control stage between a motion controller and a three-phase servomotor. It converts line energy into regulated current that positions or speeds the load in industrial automation cells. That arrangement lets the drive translate command signals into controlled motor output for coordinated machine motion.
The drive communicates through RS-232/485, a ±10 V analog channel, Step/Dir pulses, or internal indexing, so it can fit legacy or newer controllers. This mix of command options supports serial integration as well as direct analog or pulse-based control methods. Under a 240 Vac three-phase supply, it provides a continuous output of 3.0 kW while sourcing 7.1 ARMS to the motor. Short-term demands are covered by a peak output of 21.2 ARMS for five seconds, and peak mechanical power reaches 9.0 kW. At power-up, the bus can draw 300 A (0-pk) of inrush current, so upstream protection must be rated accordingly. Normal operation draws 12 A of line current and accepts motors down to 1.25 mH of inductance through cables as long as 50 m without upsetting the current loop. Switching is performed at a ripple frequency of 16 kHz, and the insulated-gate stage converts energy with 98% efficiency, which helps limit cabinet heat rise. That operating range supports compact rotary or linear servomotors mounted at some distance from the control cabinet.
During braking, the internal absorber handles 40 J of kinetic energy per event. It can dissipate 800 W continuously through the shunt resistor, provided the regenerative duty does not exceed 6%. Transient decelerations lasting up to 500 ms are supported with a shunt peak rating of 12.8 kW, which helps prevent DC-bus overvoltage when large inertial loads stop quickly. The braking circuit is intended for repeated deceleration events within the stated duty limit.
Frequently Asked Questions about CU834-002:
Q: What is the continuous output current of the CU834-002 servo drive?
A: The CU834-002 provides a continuous output current of 7.1 ARMS for sustained load operation.
Q: What is the maximum cable length allowed with the CU834-002?
A: The maximum cable length supported by the CU834-002 is 50 meters.
Q: Which command interfaces are available on the CU834-002?
A: The CU834-002 servo drive supports RS-232/485, ±10 Vdc, Step/Dir, and Indexing command interfaces.
Q: What is the peak output current capability of the CU834-002?
A: The CU834-002 features a peak output current of 21.2 ARMS for up to 5 seconds.
Q: What is the power stage efficiency of the CU834-002 servo drive?
A: The power stage of the CU834-002 achieves an efficiency of 98%.
