Product Description:

The S74802-2CF2-S4 is an S700 Servo Drives unit from Kollmorgen that controls three-phase servomotors in industrial machinery. Within the series, it converts incoming supply power into regulated output waveforms for torque, speed, and position control loops across single-axis or coordinated multi-axis motion. The drive also integrates with distributed motion networks and provides real-time current, voltage, and safety monitoring for automated cells that require stable response during indexing, positioning, and continuous speed control.

The power stage accepts a three-phase supply in the range of 208...480V, and its bus capacitors and IGBTs are sized to deliver a continuous output of 48 Arms. When the application calls for peak torque, the inverter can draw up to 35 kVA from the feeder without derating. A fixed switching pattern at 8 kHz helps minimize current ripple while keeping semiconductor losses within practical limits during sustained operation. For networked control, the integrated CAN interface includes a built-in termination resistor of 120 Ω, which removes the need for a separate terminating plug at the end of the segment. The unit uses standard PCBs, and a dedicated fan-controller expansion card supervises cabinet airflow. With connectors mounted, the enclosure depth is 285 mm and the front width is 190 mm, which helps conserve panel space in multi-axis cabinets.

At full build, the unit stands 505 mm high and weighs 13 kg, which should be considered when planning panel spacing and mounting support. Functional safety is handled by dual-channel Safe Torque Off circuitry that achieves Safety Integrity Level SIL 2 and machine Performance Level PL d when wired into a monitored supply. In the event of an internal fault, the logic blocks torque-producing energy within 3 ms, and external stop commands are executed with a verified response of 5 ms. These timing values support fast removal of motor torque during abnormal operating conditions and help limit continued drive output after a stop request.