SC722A-001-PM72008 Pacific Scientific
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The Pacific Scientific SC722A-001-PM72008 is a servo controller from the SC720 Command Controllers series. It features a continuous output current of 3.8 A and peak output current of 7.5 A, with a velocity input command range of ±10 V. This unit has an encoder resolution of 1024 ppr, RDC resolution of 12 bit, and weighs 13 lbs.
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Product Description:
The SC722A-001-PM72008 is a servo controller manufactured by Pacific Scientific within the SC720 Command Controllers series. Classified within the 720 Series architecture, it acts as a torque and velocity regulator for brushless servo axes on packaging lines, pick-and-place stations, and coordinated gantries. By combining drive power conversion with resolver feedback processing, the unit links the three-phase 240 Vac bus to the motor while presenting encoder-level position information to the supervisory PLC.
This controller draws a three-phase supply current of 4.5 Arms and delivers a continuous phase current of 3.8 A to the load, while the output can reach 7.5 A during acceleration. With these currents, the unit supplies 1.1 kW of continuous mechanical power at the motor shaft. Velocity commands are provided as a bipolar ±10 V analog reference, and current is switched at 20 kHz PWM to minimize torque ripple. A resolver-to-digital converter with 12-bit resolution feeds an encoder emulator that outputs 1024 ppr quadrature pulses so existing motion controllers can close position loops. Control personality is loaded through an analog module that tailors loop gains to the connected machine.
Dynamic energy created during rapid deceleration is routed to an internal shunt resistor that can dissipate 20 W continuously and momentarily absorb 3 kW, protecting the DC link without external braking hardware. Closed-loop speed accuracy is held within ±22 arcmin, a level suitable for precision indexing tables. Fault conditions are reported through a 3-bit open-collector port, and the front-panel monitor jack scales real-time phase current at 0.63 V per amp. The unit itself weighs 13 lbs, allowing cabinet installation without additional supports, and all functions remain accessible through the 720 Series front-panel diagnostics.
Frequently Asked Questions about SC722A-001-PM72008:
Q: What is the continuous output current rating of the SC722A-001-PM72008 controller?
A: The SC722A-001-PM72008 controller provides a continuous output current of 3.8 A.
Q: What is the encoder resolution of the SC722A-001-PM72008 servo controller?
A: The encoder resolution for this model is 1024 pulses per revolution.
Q: What peak output current can the SC722A-001-PM72008 support?
A: This controller features a peak output current capability of 7.5 A.
Q: What type of control does the SC722A-001-PM72008 support?
A: The SC722A-001-PM72008 operates as a torque/velocity controller.
Q: What is the continuous output power rating of SC722A-001-PM72008 at 240 Vac 3-phase?
A: At 240 Vac 3-phase supply, the SC722A-001-PM72008 delivers continuous output power of 1.1 kW.
