SC723B00101 Pacific Scientific
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The Pacific Scientific SC723B00101 is a servo controller from the SC720 Command Controllers series, featuring a torque and velocity control type. It delivers a continuous output current of 7.5 A and peak output current of 15 A, with a peak output power of 4.5 kW at 240 Vac 3-phase. The controller has a 4096 ppr encoder resolution and a feedback emulator for resolvers, and it weighs 16 pounds.
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Product Description:
The SC723B00101 servo controller is built by Pacific Scientific for integration into the SC720 Command Controllers series. Belonging to the 720 Series product group, it operates as a torque and velocity controller that supplies conditioned three-phase power to brushless servomotors in automated machinery. By closing the current loop around resolver feedback, the unit converts ±10 V velocity commands into regulated motor torque, supporting precision positioning and coordinated motion in material-handling or packaging lines.
Closed-loop accuracy is specified at ±4 arcmin, allowing small following errors when the drive tracks a commanded position. The controller can deliver a continuous phase current of 7.5 A, translating to a sustained mechanical output of 2.2 kW when fed from a 240 Vac, three-phase source. For acceleration bursts, the power stage supports a peak output of 4.5 kW and a momentary phase current of 15 A, giving machines the torque reserve needed for rapid indexing. The PWM bridge switches at an output ripple frequency of 20 kHz, which helps minimize audible noise and reduce torque ripple in low-inductance motor windings. A current monitor scale factor of 0.32 V/A lets external diagnostics read motor current directly from the front-panel test point, while the 4096 ppr encoder emulator reproduces incremental feedback for systems that cannot process raw resolver signals.
When operated from a 240 Vac supply, the power section draws 9 Arms, and that input is rectified to 320 Vdc, or to 160 Vdc when only 120 Vac is available. A shunt regulator rated for 6 kW dissipates regenerated energy during deceleration to keep the bus within safe limits. The on-board RDC offers 14-bit angular resolution, giving fine velocity feedback to the analog command loop. The unit weighs 16 lbs, and the steel chassis provides mounting flanges for cabinet backplates while maintaining airflow paths for forced-air cooling.
Frequently Asked Questions about SC723B00101:
Q: What is the continuous output current rating of the SC723B00101 controller?
A: The SC723B00101 controller can continuously provide an output current of 7.5 A for servo operation.
Q: What type of feedback emulation does the SC723B00101 provide?
A: This controller features an encoder emulator (resolver) for feedback emulation, supporting precise motor control applications.
Q: What is the peak output power of the SC723B00101 at 240 Vac 3-phase?
A: With a peak output power of 4.5 kW at 240 Vac 3-phase input, this controller supports high power servo systems during dynamic conditions.
Q: What is the encoder resolution on the SC723B00101?
A: The SC723B00101 has an encoder resolution of 4096 pulses per revolution, enabling accurate position control.
Q: What bus voltage does the SC723B00101 generate with a 240 Vac input?
A: Bus voltage is 320 VDC when operated with a 240 Vac input, supporting performance in industrial electrical environments.
