SC722A-001-PM72012
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The SC722A-001-PM72012 from Pacific Scientific's SC720 Command Controllers series is a Single Axis Servo controller operating at 115/230 VAC input voltage. It features a continuous output current of 3.8 A, a 20 kHz output ripple frequency, and power efficiency greater than 95%. The device weighs 13 pounds.
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Product Description:
The Pacific Scientific SC722A-001-PM72012 is a servo controller from the SC720 Series. It is designed with an analog module PM72. The unit functions as a torque and velocity controller with encoder emulator.
The SC722A-001-PM72012 provides a constant current of 3.8 Arms. It produces 160 Vdc with a 120 Vac input. The control logic accepts single-phase voltages ranging from 90 to 264 Vac at 47-63 Hz. Bus power is offered for 120 Vac single-phase and 240 Vac single or three-phase supplies. At 240 Vac three-phase, the output power can reach 1.1 kW continuously. Peak power is 2.2 kW at 240 volts three-phase. It delivers a peak current of 7.5 A for five seconds. The shunt regulator's power capability is 3 kW peak and 20 W continuous. Efficiency rate exceeds 95%. Feedback is provided via a single frameless resolver positioned on the motor. The drive provides emulated encoder outputs at 500, 512, 1000, or 1024 PPR, with ±22 arcmin precision. Optional encoder outputs are 2048 and 4096 PPR with ±4 arcmin precision. Torque and velocity are the control modes, which use analog commands. Adjustments to the PM72 include velocity offset, loop gain, command gain, and current limit. Tachometer scaling provides 1, 2, 4, or 8 V per kRPM. There is support for selecting the number of encoder lines and the number of motor poles (4 or 8). The controller has dimensions of 18 inches high, 10.6 inches wide, and 23 inches deep. The weight is 13 pounds, with a panel mount frame and Phoenix screw terminals.
At full rating, the SC722A-001-PM72012 operates at temperatures ranging from 0°C to 50°C. It is rated for applications up to 60 degrees Celsius. The storage temperature range is -55°C to 70°C. The humidity tolerance ranges from 10% to 90% non-condensing. Altitude rating is up to 5000 feet. The unit includes short-circuit, inrush current, I²t, and MOV safeguards. It has overtemperature protection for the motor and controller.
Frequently Asked Questions about SC722A-001-PM72012:
Q: How does resolver feedback improve accuracy in the SC722A-001-PM72012 Servo Controller?
A: Resolver feedback provides precise motor position sensing. It ensures reliable speed and torque control under dynamic load conditions.
Q: Why does the SC722A-001-PM72012 Servo Controller include emulated encoder outputs?
A: Emulated encoder outputs allow compatibility with systems needing encoder signals. This expands flexibility for integration into diverse automation setups.
Q: How does shunt regulator power benefit the SC722A-001-PM72012 Servo Controller?
A: The shunt regulator dissipates excess energy during deceleration. This maintains system stability and protects connected components.
Q: What role does tachometer scaling play in the SC722A-001-PM72012 Servo Controller?
A: Tachometer scaling allows flexible speed feedback adjustment. It ensures optimized velocity loop response for different motors.
Q: Why is efficiency above 95% important in Pacific Scientific SC722A-001-PM72012 Servo Controller?
A: High efficiency reduces power losses during operation. It improves thermal management and extends component lifespan.