S7720A-FBF2-PA Kollmorgen
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The Kollmorgen S7720A-FBF2-PA is part of the S700 Servo Drives series and features a rated current of 72 Arms with a voltage rating of 208 to 480V. This servo drive includes a fan controller expansion card, a dual channel STO safety capability, and supports a 24 VDC auxiliary supply. It offers coldplate and coated PCBs for enhanced durability and provides an analog input resistance of 20 kΩ and resolution of 1.25 mV.
Internal Product Review
The S7720A-FBF2-PA is a Kollmorgen S700 servo drive that stands out in motion-control cabinets with a 72 Arms rated current and a 208...480V voltage rating. Dual-channel STO and a coldplate with coated PCBs give this drive strong appeal for safety-conscious installations and harsher electrical environments. A fan controller expansion card adds practical system flexibility, while the 62.5 μs analog input update rate is a strong advantage for fast servo response.
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Product Description:
The S7720A-FBF2-PA is a servo drive manufactured by Kollmorgen and placed within the S700 Servo Drives series. As a digital power stage, it interfaces between a motion controller and a three-phase servomotor to regulate torque, speed, and position in automated machinery. It is intended for coordinated motion tasks in packaging equipment, material-handling systems, and other machines that require precise axis control.
The drive operates across a three-phase bus of 208–480 V, allowing deployment on common industrial mains without step-down transformers. The drive has a continuous capability of 72 Arms, which is the motor phase current it can deliver under rated thermal conditions. Position loops can be closed through the high-resolution analog input that discriminates changes as small as 1.25 mV; its 62.5 µs refresh helps keep command latency low, while the 20 kΩ input resistance limits source loading. For encoder interfacing, the X5 port accepts differential signals up to a frequency ceiling of 1.5 MHz, matching high-speed feedback devices. Functional safety is provided by a dual-channel STO circuit that removes motor power through separate hardware paths when an emergency stop is triggered.
The analog output stage provides a voltage swing of ±10 V with a granularity of 0.38 mV and an update interval of 250 µs, enabling precise actuator commands or transducer excitation. An auxiliary rail of 24 V DC feeds external sensors, while the Fb-2to1 header supplies 5 V DC at 300 mA for single-ended encoders. Up to 16 slave devices can share the X5 feedback channel at the stated 5 V signal level. Coldplate construction and coated PCBs support conduction cooling and resist moisture or flux residues. A plug-in fan controller card can be added for forced-air applications when the installation requires additional airflow.
