S7720A-FBF2-S4 Kollmorgen
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The Kollmorgen S7720A-FBF2-S4 is a servo drive in the S700 Servo Drives series and has a rated current of 72 Arms with a peak output current of 140 Arms for up to 5 seconds. It offers a rated input power of 50 kVA, a switching frequency of 8 kHz, and dual channel STO safety rated to SIL CL2 / PLd. The device comes in an IP20 enclosure, features a fan controller expansion card, and measures 386 mm high, 190 mm wide, and 244 mm deep.
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Product Description:
The S7720A-FBF2-S4 is a servo drive manufactured by Kollmorgen within the S700 Servo Drives series. Designed to regulate torque, speed, and position of compatible servo motors, it interfaces between a three-phase supply and the motor windings, delivering controlled current for automated machinery. Within industrial automation cells, the unit provides the closed-loop motor control necessary for CNC stations, packaging lines, and material-handling axes that demand repeatable motion accuracy.
The drive is 386 mm high, 190 mm wide, and 244 mm deep, and it weighs 13 kg. The housing carries an IP20 rating, so it must be installed inside a cabinet that offers additional ingress protection. Electrical compatibility covers mains from 208 to 480 V, and the converter can draw up to 50 kVA of apparent power under full load. Its continuous phase output is 72 Arms, and transient requirements are met by a peak capability of 140 Arms for rapid accelerations. Power devices switch at 8 kHz, a frequency that balances current ripple with thermal stress on the IGBTs. A slot is provided for a fan-controller expansion card that coordinates cabinet airflow. Dual-channel Safe Torque Off terminals disconnect the gate drive when a safety circuit is triggered, eliminating residual torque generation without mechanical relays.
For installations that need extra environmental resilience, the option for a cold-plate base and coated printed circuit boards helps transfer heat to external chill plates and shields copper traces from condensation or airborne contaminants. When aggressive moves are commanded, the full peak envelope can be sustained for 5 s, giving sufficient time for axis settling before the electronics return to their nominal limits. During standby, the power stage releases only 24 W of idle heat, easing cabinet cooling calculations. Functional safety is certified to SIL CL2 / PLd, allowing the drive to participate in category-3 stop circuits and reducing the need for additional contactors.
Frequently Asked Questions about S7720A-FBF2-S4:
Q: What is the rated output current of the S7720A-FBF2-S4 servo drive?
A: The S7720A-FBF2-S4 has a rated output current of 72 Arms for continuous operation.
Q: What is the peak output current and duration for the S7720A-FBF2-S4?
A: This servo drive features a peak output current of 140 Arms available for up to 5 seconds.
Q: What kind of STO capability does the S7720A-FBF2-S4 provide?
A: The S7720A-FBF2-S4 model comes with dual channel STO (Safe Torque Off) capability for enhanced safety integration.
Q: What is the enclosure rating for the S7720A-FBF2-S4 servo drive?
A: It is designed with an IP20 enclosure rating, which offers basic protection in typical control cabinet environments.
Q: What input voltage range is supported by the S7720A-FBF2-S4 servo drive?
A: This drive accommodates a voltage range between 208 and 480 volts, suitable for various industrial power systems.
