SC722B-001 Pacific Scientific
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The Pacific Scientific SC722B-001 is a servo controller from the SC720 Command Controllers series and weighs 13 pounds. It features a continuous output current of 3.8 Amps, a peak output current of 7.5 Amps, and supports output power ratings of 1.1 kW continuous and 2.2 kW peak at 240 Vac. The controller offers an encoder resolution of 4096 ppr and uses a torque or velocity control type with a PWM frequency of 20 kHz.
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Product Description:
The SC722B-001 is a servo controller produced by Pacific Scientific within the SC720 Command Controllers series. Configured as a torque and velocity controller, it regulates current and speed loops for brushless and brushed servo motors in automated machinery. By interfacing with motion processors through an analog velocity command, it serves as the central drive element that converts line-fed power into controlled three-phase outputs for precision positioning tasks on assembly cells, material handling axes, and packaging equipment.
The controller’s DC link operates at 320 Vdc when supplied from a 240 V three-phase source, allowing the IGBT bridge to switch at 20 kHz for low motor noise. Under continuous duty, it delivers 3.8 A of output current, while acceleration events can draw up to 7.5 A. These current limits correspond to a continuous mechanical output of 1.1 kW at the motor terminals. The unit draws 4.5 Arms from the mains and accepts a ±10 V velocity command that scales with speed demand. A monitor output of 0.63 V per ampere provides real-time current feedback to external diagnostics, and the shunt regulator dissipates 20 W continuously while connecting automatically when the DC voltage rises.
Position integrity is maintained through a resolver front end that feeds a 14-bit RDC, while an integrated encoder emulator supplies quadrature feedback at 4096 ppr to upstream controllers. The closed-loop accuracy is specified at ±4 arcmin, which is adequate for mid-range pick-and-place and indexing applications. During rapid moves, the drive can furnish a peak mechanical output of 2.2 kW, with excess energy sent to the braking resistor where the shunt can absorb bursts up to 3 kW. A 3-bit open-collector fault output signals overcurrent, overtemperature, or bus overvoltage events, and the enclosure weighs 13 lbs for panel mounting.
Frequently Asked Questions about SC722B-001:
Q: What is the continuous output current rating of the SC722B-001 controller?
A: The SC722B-001 supports a continuous output current of 3.8 A for sustained operations.
Q: What is the maximum peak output power of the SC722B-001?
A: Peak output power for the SC722B-001 is rated at 2.2 kW when operated on 240 Vac 3-phase.
Q: What is the positioning accuracy of the SC722B-001 controller?
A: The controller achieves a positioning accuracy of ±4 arcminutes.
Q: What type of control does the SC722B-001 provide?
A: This model utilizes a torque and velocity control type for motor management.
Q: What encoder resolution does the SC722B-001 support?
A: The SC722B-001 features a 4096 ppr encoder resolution for precise feedback.
