DIGIFAS 7204 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen DIGIFAS 7204 is part of the DIGIFAS 7000 Servo Amplifiers series and has dimensions of 275 by 71 by 235 mm with a weight of 2.1 kg. This servo amplifier has a rated output current of 4.2 Arms, peak output current of 8.4 Arms, and an intermediate circuit voltage of 560 VDC. It features an IP20 protection class and supports a ballast resistor of 150 Ohms with continuous ballast power of 75 Watts.
Internal Product Review
The DIGIFAS 7204 is a Kollmorgen servo amplifier that impresses with IP20 protection and a 2.5 kVA rated connected load. Control performance is strong, supported by 1 kHz current controller bandwidth and 4.2 Arms rated output current. A 560 VDC intermediate circuit voltage and 8.4 Arms peak output current make the amplifier a capable choice for demanding motion applications.
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Product Description:
The DIGIFAS 7204 is a compact drive module produced by Kollmorgen and supplied within the DIGIFAS 7000 Servo Amplifiers series. It accepts power from a shared DC bus and converts that energy into precisely regulated three-phase currents for brushless servomotors. By providing closed-loop torque and velocity control, the unit supports coordinated motion in pick-and-place robots, indexing tables, and web handling lines where accurate speed following and rapid dynamic response are required. Its slim housing eases cabinet layout in multi-axis systems.
It delivers a rated phase current of 4.2 Arms, ensuring continuous torque production for motors with an inductance of at least 8 mH. For rapid acceleration, the module can supply a peak current of 8.4 Arms, a short-term allowance that covers dynamic overloads without excessive heating. The current loop has a controller bandwidth of 1 kHz, so commanded torque changes settle within about one millisecond. Internal transistors switch at an output stage frequency of 8.33 kHz, limiting audible noise while keeping current ripple low. Energy is drawn from a DC link maintained near 560 VDC, a level that supports high power density and reduces the required cable cross section for the same shaft power.
Regenerative energy is dissipated through a 150 Ω ballast resistor that can handle a continuous thermal load of 75 W, preventing the bus voltage from rising during deceleration. Hardware protection activates at 750 V and immediately shuts down the unit to protect internal components. The housing has an IP20 rating, making it finger-safe while requiring installation inside an enclosure. Forced airflow helps dissipate the 60 W of power lost during full-load operation. The module has a 275 × 71 × 235 mm frame, weighs 2.1 kg, and has a residual voltage drop of 5 V across the output stage.
