Product Description:

The SC942-001-01 belongs to the SC900 Servo Drives series manufactured by Pacific Scientific. It is a digital servo drive intended to regulate brushless servo motors in automated machinery, supplying tightly controlled current and voltage so that position, velocity, and torque commands from the host controller are carried out with precision. Closed-loop regulation helps the connected motor follow changing motion demands during automated machine cycles. This type of control is commonly used on positioning axes that require repeatable response during start, stop, and speed-change commands.

The drive exchanges motion data through a SERCOS optical ring, allowing deterministic command and feedback traffic at the controller level. Under natural convection at 25 °C, it can sustain 3.75 A of output current, translating to a continuous mechanical output of 1.1 kW when powered from a 240 V three-phase source. Power devices reach a conversion efficiency of 95%, so only a small share of input energy becomes heat that must be removed by enclosure airflow. The drive supports motors with a maximum line-to-line inductance of 4 H, which helps limit current ripple at high carrier frequencies and keeps the current loop stable during rapid accelerations. The optical ring also helps coordinate multiple axes with consistent timing across the system.

Transient events are handled by permitting a peak output of 7.5 A, doubling the continuous level for short intervals such as index moves or fast starts. When full mains voltage is available, this surge can deliver 2.2 kW to the motor shaft, giving extra headroom for overcoming static friction or brief process upsets. The drive remains usable with motors whose inductance falls to 4.0 mH, a lower limit that allows the current regulator to filter switching ripple without requiring external reactors. This operating range supports use in multi-axis assemblies as well as single-station retrofits.