SC723A-001-PM72004 Pacific Scientific
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The Pacific Scientific SC723A-001-PM72004 is a servo controller from the SC720 Command Controllers series. It has a continuous output current of 7.5 Amps, a peak output current of 15 Amps, and a continuous output power of 2.2 kilowatts at 240 Volts AC three-phase. The unit features torque and velocity control, an encoder resolution of 1024 pulses per revolution, and weighs 16 pounds.
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Product Description:
The SC723A-001-PM72004 is an analog servo controller produced by Pacific Scientific for the SC720 Command Controllers series. As a torque and velocity controller, it converts reference signals into three-phase power suitable for permanent-magnet brushless motors used in packaging lines, pick-and-place gantries, and other industrial axes. The unit belongs to the Analog APM module family, allowing it to slide into a 720 Series rack alongside digital or stepper modules so that a single backplane can coordinate mixed-mode motion.
The controller can source a continuous armature current of 7.5 A, while transients are handled with a peak capability of 15 A. These currents are produced by a PWM bridge that switches at 20 kHz, and the high carrier frequency lowers noise and current ripple. From a 240 VAC three-phase supply, the module delivers 2.2 kW continuously and up to 4.5 kW for brief overloads. A 5.8 mH line-to-line inductance shapes the waveform, and the 0.32 V/A monitor scale factor lets a scope or PLC read motor torque. The command input expects a differential ±10 V signal, and the rated motor speed ceiling of 7000 rpm suits high-speed axes.
Position-loop performance includes an accuracy of ±22 arcmin on the resolver loop and an encoder emulation output of 1024 ppr that can be wired to standard drive interfaces. The resolver-to-digital converter operates at 12-bit resolution, and a 3-bit fault code output flags over-temperature, loss-phase, or over-current events to upstream controllers. The input stage presents 50 kOhm impedance, which minimizes loading on the motion card that provides the command voltage. Thermal behavior includes 77 W of dissipation at full load, while peak mechanical load response is aided by 3.0 Nm of available torque. With a shipping mass of 16 lbs, the module is light enough for panel-mounted installations while still housing the required power electronics and encoder emulator circuitry.
Frequently Asked Questions about SC723A-001-PM72004:
Q: What control types are available on the SC723A-001-PM72004 controller?
A: The SC723A-001-PM72004 supports both torque and velocity control modes.
Q: What is the continuous output current of the SC723A-001-PM72004?
A: This controller offers a continuous output current of 7.5 A, supporting demanding motion tasks.
Q: What encoder resolution does the SC723A-001-PM72004 offer?
A: The SC723A-001-PM72004 provides an encoder resolution of 1024 pulses per revolution.
Q: What is the peak output power of the SC723A-001-PM72004 controller?
A: The unit can deliver peak output power of up to 4.5 kW at 240 Vac 3-phase.
Q: What is the analog command input range for the SC723A-001-PM72004?
A: The SC723A-001-PM72004 uses analog command signals in the ±10 V range for precise input control.
