PC834-105-N Pacific Scientific
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The Pacific Scientific PC834-105-N is part of the PC800 - PCE800 Brushless Servo Drives series. It supports an input power of 240 VAC three-phase and a continuous output power of 3.0 kW with a bus voltage of 320 VDC. The drive offers a peak output current of 21.2 ARMS, six inputs and three outputs, and achieves a power stage efficiency of 98%.
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Product Description:
The PC834-105-N is a brushless servo drive manufactured by Pacific Scientific and delivered within the PC800 – PCE800 Brushless Servo Drives series. It modulates current and voltage for permanent-magnet servo motors, allowing closed-loop position, velocity, and torque control in automated machinery and material-handling cells. Housed in a compact frame, the unit installs between the three-phase mains and a resolver-equipped motor to coordinate precise motion sequences in industrial equipment. The brushless drive design supports repeatable response during frequent starts, stops, and speed changes, making it suitable for applications that require stable axis control over continuous duty cycles.
Internally, a DC link of 320 VDC stores energy recovered from the rectified 240 VAC three-phase supply. The drive delivers a continuous output current of 7.1 ARMS and can reach 21.2 ARMS for short acceleration demands; together with a continuous output power capability of 3.0 kW, these values indicate the motor capacity the unit can support. A power-stage efficiency of 98% keeps thermal losses low, so the rms line current remains 12 A under nominal load. Command data can enter through RS-232/485 serial links, a ±10 V analog channel, step-and-direction pulses, or internal indexing tables. The controller also accepts a resolver feedback carrier at 6510.42 Hz, supports motor pulsation up to 800 kHz in step mode, maps six digital inputs and three digital outputs to user functions, and drives a form-C relay that switches 1 A at 30 VDC.
All auxiliary services are provided through the front panel, including a user logic rail that supplies 250 mA at 5 V and a separate 24 V source rated at 80 mA for indicator lamps or small relays. Front-access connections simplify wiring and keep low-power auxiliary circuits separate from the main motor power section. With enclosure dimensions of 198.1 × 88.1 × 158 mm, the drive fits easily into compact control cabinets. Pacific Scientific places the unit in a form factor suited to single-axis installations that also need local power for small external devices and control logic.
Frequently Asked Questions about PC834-105-N:
Q: What bus voltage does the Pacific Scientific PC834-105-N servo drive require?
A: The PC834-105-N servo drive operates with a bus voltage of 320 VDC.
Q: Which command interfaces are available on the PC834-105-N drive?
A: The PC834-105-N supports RS-232/485, ±10 Vdc, Step/Dir, and Indexing command interfaces.
Q: What is the continuous output current capability of the PC834-105-N?
A: This model delivers a continuous output current of 7.1 ARMS for servo motor operation.
Q: What is the maximum step frequency supported by the PC834-105-N servo drive?
A: The PC834-105-N can achieve a maximum step frequency of 800 kHz for step/direction control.
Q: What input power supply is needed for the Pacific Scientific PC834-105-N drive?
A: The main input power requirement for this unit is 240 VAC, 3 phase.
