Product Description:

Kollmorgen’s S74801-NA belongs to the S700 Servo Drives series and is classified by the manufacturer as an S700 servo drive. It converts the three-phase mains supply into controlled output waves that close the motor control loop inside industrial robots, packaging stations, and general motion axes. Integrated fieldbus interfaces connect the drive to upper-level controllers so that position commands and diagnostic data are exchanged in real time.

The power section accepts line voltages from 208–480 V and is rated for 35 kVA of apparent input power, which indicates the maximum load the upstream supply must accommodate. Under steady operation, the output delivers a continuous phase current of 48 Arms. Short load peaks are handled with up to 96 Arms to accelerate inertial masses without saturation. The IGBT bridge is clocked at 8 kHz, balancing switching losses against current ripple, and the output current form factor of 1.01 indicates that RMS and average values are almost identical. Control wiring is sized for 24 V logic, with digital inputs drawing 15 mA, digital outputs sourcing 100 mA, and the isolated relay contact carrying 500 mA while leaving only a 6 V residual drop across the terminals. Up to 30 power-on cycles per hour are permissible, and the unit dissipates 24 W when idling.

Mechanical integration is straightforward because the housing measures 190 mm in width, 244 mm in depth without connectors, and 386 mm in height. Transport weight is 13 kg, and acoustic output stays below 62 dB(A). Safety is addressed with the drive’s Single channel STO function, which removes torque-producing power when triggered. The unit ships with standard PCBs sealed inside the enclosure, and no separate expansion card is required because EtherCAT and CANopen networking is already onboard. Efficient internal airflow keeps electronic components within acceptable operating limits while maintaining the low noise figure.