Product Description:

The S7720F-FBF2-PM is a servo drive built by Kollmorgen for the S700 Servo Drives series. It controls synchronous and induction motors on machine tools, packaging lines, and articulated robots by converting motion commands from a PLC into precisely timed three-phase outputs. Integrated current loops, velocity observers, and position regulators reside in the same enclosure, allowing tight control without external amplifiers. This arrangement saves cabinet space, simplifies wiring, and shortens setup time in multi-axis installations.

The power stage accepts a three-phase supply of 208–480 V and can deliver a continuous output current of 72 Arms, which sets the operating limits for connected motors. Line capacity up to 50 kVA helps keep the DC bus stable during simultaneous axis acceleration, while internal IGBTs operate at a switching frequency of 8 kHz to reduce torque ripple. Safety is handled by a dual-channel STO circuit that removes drive energy without mechanical relays. A residual voltage drop of 6 V between the DC bus and motor terminals reflects efficient conduction. When commanded, the integral brake supply furnishes 3 A and interfaces with an external brake resistor port to handle regenerative energy. The fan-controller expansion board manages airflow, keeping disabled-state losses at 24 W and supporting 30 starts per hour.

The service lines draw only 2 A from the auxiliary 24 V circuit, leaving most low-voltage capacity for sensors and controls. Installation is aided by dimensions of 386 mm in height, 190 mm in width, and 244 mm in depth, while the assembly weighs 13 kg. Acoustic output remains below 68 dB(A), and coated printed-circuit boards guard against moisture and dust. The braking terminal is preset for a resistor of 10 Ω, allowing predictable deceleration energy management.