Product Description:

Kollmorgen manufactures the S7720A-2CF2-PA, a component of the S700 Servo Drives series. This S700 servo drive converts three-phase mains power into precise current and voltage profiles for synchronous or induction motors used in packaging lines, pick-and-place modules, and other motion axes. By integrating drive control, safety, and communication features, the unit supplies the regulated power and feedback processing needed to position loads accurately in industrial automation cells.

The analog control interface has an input resistance of 20 kΩ, ensuring that standard process transmitters are not loaded by the drive. Resolution at the converter front end is 1.25 mV, so small reference changes are detected without dithering. Each new sample is accepted every 62.5 µs, and the channel tolerates command swings up to ±10 V. On the output side, the D/A section produces feedback with a granularity of 0.38 mV and refreshes it every 250 µs across the same voltage span. A current control loop synchronized to the sampling cadence modulates the power stage. Two CAN ports linked through a 120 Ω bus termination support distributed drives. Protective logic provides dual-channel STO, while a permitted switch-on or switch-off rate of 30 events per hour limits thermal cycling. The residual DC link drop is 6 V, and the mains range spans 208 to 480 V.

The power section operates with an output-stage carrier frequency of 8 kHz, balancing acoustic performance with switching losses. Continuous motion applications can draw a rated phase current of 72 Arms, while rapid accelerations are supplied up to 140 Arms for short intervals. With a feeder capacity of 50 kVA, the drive matches axes such as gantry heads and form-fill-seal stations. Thermal stability comes from the cold-plate base and coated PCBs, and a plug-in fan-controller card manages auxiliary airflow. Heat from switching devices is transferred directly into an external sink, reducing cabinet temperature.