S74802-DNF2-S4 Kollmorgen
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The Kollmorgen S74802-DNF2-S4 is a single-axis servo drive from the S700 Servo Drives series, featuring a rated current of 48 Arms and supporting three-phase AC input at 208 to 480 volts with a line frequency of 50/60 Hz. It is equipped with a DeviceNet fieldbus slot, dual channel STO safety feature, and has a weight of 13 kilograms.
Internal Product Review
The S74802-DNF2-S4 is a Kollmorgen S700 servo drive with a 208...480V rating, making the unit a strong fit for industrial motion control. DeviceNet fieldbus support and dual channel STO give the drive excellent network integration and dependable machine safety. A 48 Arms rated current with S2-2 safety hardware makes the package a very capable servo platform.
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Product Description:
The S74802-DNF2-S4 servo drive is produced by Kollmorgen within the S700 Servo Drives series. As a single-axis amplifier, it interfaces between a three-phase supply and a brushless servo motor, providing regulated current and integrated safety functions for motion tasks in industrial automation cells and machine tools. It is intended for closed-loop positioning and speed control of one motor axis. The unit is suited to applications that require repeatable acceleration, deceleration, and position holding during automated cycle changes. Its integrated power and safety electronics let the drive handle motor control in a compact package.
This model accepts a three-phase AC source in the 208 to 480 V range at 50/60 Hz, and its power section switches at 8 kHz for fine current modulation with reduced ripple. Under continuous load, the drive supplies 48 Arms, while transient demands can be supported for up to 5 s without derating. Safety is provided by the built-in dual-channel STO function, which is supervised by the S2-2 safety card in slot 3. Motion commands and diagnostics are exchanged through the DeviceNet fieldbus installed in slot 1, and the control section manages one axis on standard PCBs protected by conformal coatings.
The enclosure measures 190 × 386 × 244 mm, so it occupies one rack width while leaving clearance for cabling. Heat dissipation at idle is limited to 24 W, and a factory-installed fan controller with a controlled fan in slot 2 circulates air when internal sensors detect elevated temperature. The cooling arrangement supports the internal electronics and corresponds to the SIL CL2, PL d functional safety rating used for the drive. Total mass is 13 kg, which supports panel mounting with appropriately sized vibration isolation. Its cabinet footprint and cooling method should be considered when arranging neighboring modules and cable routing in a packed enclosure.
