Product Description:

The DIGIFAS 7200 servo amplifier is manufactured by Kollmorgen and belongs to the DIGIFAS 7000 Servo Amplifiers series. Designed for cabinet installation, the unit conditions a high-energy DC bus and modulates phase currents so that brushless servomotors follow velocity and position commands with minimal latency. By handling drive power, feedback conversion, and brake control in a single package, it serves as the core actuator interface in automated assembly cells and material-handling equipment.

Its power section is referenced to a rated DC bus of 560 VDC, and the internal current loop closes at 1 kHz, allowing torque transients to be corrected within a millisecond. The output transistors switch at 8.33 kHz, creating a smooth sinusoidal waveform while keeping switching losses manageable. Command data enter through an analog interface that delivers a 14-bit setpoint resolution, which supports fine velocity trimming at low speeds. The amplifier meets the IP20 protection class, so it is intended for dry, filtered electrical enclosures. Input circuitry presents a resistance of 20 kΩ and draws 7 mA from each digital control line, minimizing load on PLC outputs. A residual voltage drop of 5 V appears between the DC bus and motor terminals, and the integrated brake driver can source up to 1 A for holding brakes during standstill. Physical dimensions of 275 × 71 × 235 mm allow narrow stacking, and the assembly weighs 2.1 kg for convenient panel mounting.

The DC link is safeguarded by a trip circuit that opens at 750 VDC and inhibits operation below 65 VDC, preventing component stress from line surges or brownouts. An additional ballast resistor engages at 720 VDC and disengages when the bus falls to 680 VDC, dissipating regenerated energy from rapid deceleration sequences. During idle states, the amplifier draws only 15 W, reducing the thermal load on ventilation systems in tightly packed cabinets.