Product Description:

The S7720C-EIF2-S3 is a servo drive produced by Kollmorgen within the S700 Servo Drives series. The unit converts three-phase mains power into controlled motor current so that permanent-magnet servomotors can be positioned precisely in packaging lines, robotics cells, or material-handling axes. It is supplied in a cold-plate format that couples directly to a chilled backplane, allowing efficient heat removal and compact cabinet layouts.

The drive accepts a line supply from 208 to 480 V and draws up to 50 kVA under rated mechanical load. At that point, it delivers a continuous phase current of 72 Arms with a residual voltage drop of 6 V between the DC bus and motor terminals. For rapid acceleration events, current rises momentarily to 140 Arms while power devices switch at 8 kHz, limiting torque ripple. An addressing time of 4 ms helps coordinate networked motion commands, and 14 additional digital inputs with 8 digital outputs support sensor and actuator linking. A dedicated fan-controller expansion card is available, and the integrated cold plate dissipates 24 W of thermal loss when the power stage is disabled. An external 10 Ω brake resistor can absorb 8 kW of continuous brake power, letting the axis decelerate without overvoltage.

Functional safety is handled by a redundant hardware architecture that meets the requirements of SIL CL3 and provides a dual-channel STO interface for safe torque off. The control terminals can source up to 500 mA of signal output current, and the holding-brake supply supports a maximum of 3 A for motor brakes. During repetitive machine cycles, the unit may be energized up to 30 times per hour without exceeding its thermal design limits, and airborne sound pressure remains below 68 dB(A) at full load. The cold-plate base keeps component temperatures stable while the fan controller regulates forced airflow when fitted.