Product Description:

The DIGIFAS 7108-L2/DP is a servo amplifier produced by Kollmorgen within the DIGIFAS 7000 Servo Amplifiers series. This unit forms the power and control interface between a machine controller and a brushless servo motor. It modulates the DC bus to supply phase-synchronized current so that industrial axes maintain commanded torque, speed, and position. The amplifier can support automated machinery that requires coordinated motion under changing loads and operating conditions.

The power stage is energized from a rated DC link of 560 VDC, and the inner current regulator operates at 1 kHz to provide tight control of motor flux. Pulse-width modulation is generated at 8.33 kHz, a switching rate that limits audible noise while keeping semiconductor losses moderate. Continuous motor current is rated at 8 Arms, while short bursts can reach 16 Arms during acceleration or sudden load changes. These current levels correspond to a connected load of 4.5 kVA. Protective circuitry disconnects the DC bus if its voltage rises to 750 VDC, helping protect the power electronics from excessive voltage. The available current margin supports responsive torque generation when the connected motor experiences brief increases in demand.

Dynamic braking energy is absorbed by an internal network that can dissipate 6.9 kW in pulses and 200 W continuously. If the application inertia exceeds that capacity, an external resistor with a resistance of at least 75 Ω must be added. Total power loss is limited to 100 W at rated load and 15 W while idle, reducing the ventilation needed inside the enclosure. The amplifier accepts motors with a minimum phase inductance of 5 mH, and it communicates with higher-level controllers through a Profibus 9-pin Sub-D socket. Its housing measures 340 × 105 × 341 mm, providing a narrow profile for installation in an electrical cabinet. The unit weighs 7.9 kg and can be secured to standard mounting plates within the enclosure.