PC844-001-A Pacific Scientific
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The Pacific Scientific PC844-001-A is part of the PC800 - PCE800 Brushless Servo Drives series and is equipped with a SERCOS network command interface. This drive offers a continuous output current of 7.1 A RMS and a peak output current of 21.2 A RMS for short durations. It features a 44-pin D-sub command I/O connector and weighs 2.6 kg.
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Product Description:
The PC844-001-A is a brushless servo drive produced by Pacific Scientific within the PC800-PCE800 Brushless Servo Drives series. As part of a closed-loop motion system, the unit delivers controlled three-phase power to a matched servomotor and returns status data to the host controller. It is used in industrial automation where precise speed and torque regulation are required for packaging, material handling, and assembly stations. Integration is simplified because the drive combines power electronics, current regulation, and network communication in one housing.
Electrical performance centers on a continuous output capability of 7.1 A RMS, allowing the drive to run motors at rated load without derating. Short-term overloads are supported with a peak output of 21.2 A RMS for five seconds, which is useful during acceleration. The internal current loop is pulse-width modulated at a ripple frequency of 16 kHz, which helps reduce audible noise and motor heating. Command data are exchanged over the SERCOS Network, and control, feedback, and auxiliary signals enter through a 44-pin D-sub connector. For external sensors, the drive supplies a programmable auxiliary rail rated at 24 VDC, 80 mA, which simplifies wiring for limit switches or relay coils.
Position feedback devices receive a dedicated supply of 5 VDC, 250 mA, which keeps encoder power separate from the main bus. The power stage is compatible with motor windings from 1 H down to 1.25 mH, allowing operation with both high-inductance frameless motors and low-inductance high-speed models. The housing measures 198.1 mm in height, 114.8 mm in width, and 157.9 mm in depth, and four mounting slots with a diameter of 7.37 mm secure the drive to a control panel. The package includes a D-sub connector kit for field assembly. Overall mass is 2.6 kg, which keeps cabinet load low while maintaining the thermal capacity expected for this power level.
Frequently Asked Questions about PC844-001-A:
Q: What type of command interface does the PC844-001-A servo drive use?
A: The command interface is SERCOS Network, enabling digital communication with automation systems.
Q: What is the continuous output current for the PC844-001-A?
A: This drive supports a continuous output current of 7.1 A RMS.
Q: Which connector is used for the command I/O on the PC844-001-A?
A: A 44-pin D-sub connector is provided for command I/O connections.
Q: What is the encoder supply voltage and current on the PC844-001-A?
A: It can supply encoder power at 5 VDC, 250 mA for feedback devices.
Q: What is the peak output current of the PC844-001-A and for how long is it sustained?
A: The peak output current for 5 seconds is rated at 21.2 A RMS.
