Product Description:

The SC402D23T4 is a servo drive produced by Pacific Scientific as part of the SC400 Servo Drives series. It interfaces between plant-level AC mains and a brushless servo motor, delivering regulated current and velocity commands so the motor can execute closed-loop moves in packaging lines, conveyors, and light assembly robots. The drive accepts AC input, converts it to a DC bus, and then modulates motor output to control torque and speed during indexed and continuous-motion tasks. By rectifying the supply and using pulse-width modulation, it provides the feedback-controlled power needed for precise positioning in industrial automation systems.

On a 115 VAC source the internal DC bus stabilizes at 160 VDC, while a 230 VAC feed raises the bus to 320 VDC; this DC potential acts as the energy reservoir for the inverter stage. During continuous operation, the power section can supply 3.50 A of motor current, and its current loop switches at an output ripple frequency of 20 kHz to keep audible noise and torque ripple low. For rapid accelerations, the drive permits a momentary surge to 7.0 A, allowing the connected motor to overcome inertial loads without entering current limit.

When commanded from a motion controller, the amplifier can deliver up to 1000 W of mechanical power on the lower input voltage or 2000 W on the higher input voltage, which gives the axis more available output when more supply voltage is present. Velocity feedback is processed through a tach input with a gradient of 4.0 V/Krpm, and the speed loop accepts a differential velocity command of ±10 V, matching common PLC and CNC analog outputs. A dedicated fault transistor supports a 30 VDC, 25 mA fault output so drive trips can be reported to safety relays, and the drive can be wired to either single-phase or three-phase mains.