S7720C-EIF2-PM Kollmorgen
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The Kollmorgen S7720C-EIF2-PM is a servo drive from the S700 Servo Drives series with a voltage rating of 208 to 480V and a rated input power of 50 kVA. It features a peak output current of 140 Arms, supports 14 extension inputs and 8 outputs, and is equipped with a fan controller expansion card. This drive has a coldplate option, a dual channel STO capability, and emits a maximum noise level of 68 dB(A).
Internal Product Review
The S7720C-EIF2-PM is a Kollmorgen S700 servo drive with a coldplate option and dual-channel STO capability. Rated output at 72 Arms with 140 Arms peak current supports demanding motion profiles and stable servo response. Operation across 208...480 V with an 8 kHz switching frequency makes the unit a strong choice for high-performance drive applications.
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Product Description:
The S7720C-EIF2-PM is a Kollmorgen servo drive supplied within the S700 Servo Drives series. It provides current-controlled three-phase power to compatible synchronous or induction motors, allowing precise velocity and torque regulation in automated machinery, material-handling axes, and packaging lines. The unit integrates safety functions, line filtering, and cooling options so it can be mounted in a cabinet as the central actuator interface between the plant controller and the motor. This arrangement supports stable closed-loop motion on axes that must respond quickly to changing load conditions while maintaining consistent speed and torque control during repetitive cycles.
The drive delivers a continuous output of 72 Arms with an input capability of 50 kVA, indicating the power available for steady-state operation. It accepts mains supplies from 208–480 V three-phase power and switches this input at 8 kHz to create pulse-width-modulated motor voltage. During acceleration or shock loading, the current can rise briefly to 140 Arms, and the output waveform has a form factor of 1.01. Upstream protection requires an AC line fuse rated at 80 A, which limits fault energy before it reaches the internal bus capacitors. Disabled-state losses are only 24 W, which helps reduce cabinet heat when the axis is idle, and the fan controller expansion card manages airflow through the cold plate option.
A separate brake-resistor circuit is safeguarded by a 125 A fuse so regenerated energy can be dissipated without overstressing wiring. Functional safety is implemented with dual-channel STO, allowing the controller to remove torque without shutting off mains power. The cooling fan starts when the internal heat sink reaches 65 °C, which helps keep power components within their intended temperature range. Additional resources include 14 discrete inputs, 8 outputs, and a 5 V Posi/O signal level, while each digital output can source up to 100 mA. Residual DC bus drop is 6 V for fast braking response, and acoustic emission remains below 68 dB(A) for use in nearby work areas.
