S77202-2CF2-S3 Kollmorgen
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The Kollmorgen S77202-2CF2-S3 is an S700 Servo Drive with dimensions of 386 mm in height, 190 mm in width, and 244 mm in depth. It supports a rated current of 72 Arms and can handle an input power of 50 kVA. This drive features dual channel STO capability, a fan-controlled cooling option, and an enclosure rated at IP20.
Internal Product Review
The S77202-2CF2-S3 is a Kollmorgen S700 servo drive built for demanding motion applications, with a 208...480V rating and 72 Arms rated current. Controlled fan cooling and an 8 kHz output stage frequency support stable thermal performance and precise drive response. Dual channel STO with SIL3, PL e makes this drive especially appealing for safety-critical installations.
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Product Description:
The S77202-2CF2-S3 is a digital servo drive produced by Kollmorgen and assigned to the S700 Servo Drives series. It regulates torque, speed, and position of synchronous motors in automated machinery, linking motion axes to higher-level PLCs through real-time fieldbus interfaces. Within an enclosure, the unit functions as the power electronics layer between the mains supply and the motor, converting AC input into controlled three-phase output for manufacturing cells and packaging lines that require coordinated axis control.
It operates from a three-phase supply of 208 to 480 V, enabling deployment across low- and medium-voltage panels. Under continuous duty, the power section delivers 72 Arms to the motor windings, while the IGBT bridge switches at 8 kHz; this carrier frequency balances torque resolution with manageable heat. The converter can draw up to 50 kVA of apparent power, so upstream breakers and cabling must be sized accordingly. The housing is 244 mm deep, 386 mm high, and 190 mm wide. Heat is removed by a controlled fan governed by the factory-installed fan-controller expansion card, and the housing meets IP20, so it must be installed in a protected panel. Standard PCBs are used without conformal coating, which suits clean room or sealed cabinet environments.
Functional safety is integrated, and the drive achieves SIL 3 and PL e without external safety relays. A dedicated hardware circuit provides dual-channel STO, removing gate power in less than a millisecond for emergency stops. For dynamic loads, the output stage tolerates overload for 5 s, supplying extra acceleration torque before thermal limits apply. The permitted energization rate is 30 times per hour, which helps protect inrush components during frequent power-ups. Installed mass is 13 kg, which supports manageable cabinet installation.
