SC753A-040-08 Pacific Scientific
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The Pacific Scientific SC753A-040-08 is a servocontroller from the SC750 Servo Drives series, featuring a programmable digital position controller and resolver feedback. This drive supports a continuous current of 7.5 Amps, a peak current of 15 Amps, and a peak power output of 4500 Watts. It uses natural convection cooling and has a max power dissipation of 77 Watts, with a weight of 7.26 kilograms.
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Product Description:
The SC753A-040-08 is a servo controller supplied by Pacific Scientific for the SC750 Servo Drives series. As a programmable drive, it issues torque and velocity commands to brushless servo motors, closing the position loop inside the controller rather than at the machine. In automated pick-and-place lines, indexing tables, and packaging axes, the unit translates motion commands from a PLC into precise current waveforms so that each move is executed with repeatable accuracy and minimal settling time.
During continuous operation, the drive delivers 7.5 A of motor current, which is the thermal limit at which the output devices can operate indefinitely without derating. The internal processor makes it a programmable digital position controller, so lead-lag compensation, following error handling, and move profiles are managed without an external motion card. Heat is removed by natural convection, so the aluminum heat sink must be mounted in a cabinet with free airflow instead of forced fans. Rotor position is detected through resolver feedback, allowing accurate angle information with high noise immunity even in electrically harsh environments. For acceleration bursts, the power stage can produce 15 A, and at that level the instantaneous mechanical power transferred to the motor can reach 4,500 W, which covers fast indexing strokes or short hammering loads.
The power electronics inside the housing dissipate up to 77 W, so enclosure layout must ensure that neighboring devices do not restrict the vertical heat plume. When higher accuracy is required, an option adds a phase-aligned positioning tolerance of +22 arcmin, tightening the allowable error band for alignment tasks such as automated screw driving. A supply transformer rated at 3 kVA is recommended because this capacity provides surge energy for peak current events while maintaining line voltage stability for the controller logic. At 7.26 kg, the drive can be panel-mounted without special reinforcement and remains manageable for cabinet installation.
Frequently Asked Questions about SC753A-040-08:
Q: What is the continuous current rating of the SC753A-040-08 servo drive?
A: The SC753A-040-08 servo drive supports a continuous current of 7.5 A during standard operation.
Q: What type of feedback system does the SC753A-040-08 servo drive utilize?
A: This model uses resolver feedback for precise motion control and positioning.
Q: How is the SC753A-040-08 servo drive cooled?
A: The SC753A-040-08 operates with natural convection, eliminating the need for external cooling devices.
Q: What is the peak current supported by the SC753A-040-08 servo drive?
A: It features a peak current capability of 15 A, allowing for short bursts of high power.
Q: What transformer rating is recommended for the SC753A-040-08 servo drive?
A: The recommended transformer rating for this unit is 3 KVA, ensuring adequate power supply.
