DIGIFAS 7108-SPS Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The DIGIFAS 7108-SPS servo amplifier is manufactured by Kollmorgen and is part of the DIGIFAS 7000 Servo Amplifiers series. It has a rated output current of 8 Arms and peak output current of 16 Arms, with a rated load of 4.5 kVA. The amplifier features an IP20 protection class and weighs 7.9 kilograms.
Internal Product Review
The DIGIFAS 7108-SPS is a Kollmorgen servo amplifier that delivers 8 Arms rated output current and 16 Arms peak output current for precise motion control. A 1 kHz current controller bandwidth and 8.33 kHz output stage clock support fast, stable response in demanding drive applications. The IP20 protection class makes this amplifier a strong choice for enclosed industrial installations.
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Product Description:
The DIGIFAS 7108-SPS is a servo amplifier manufactured by Kollmorgen for the DIGIFAS 7000 Servo Amplifiers series. In an automation cell, it sits between the DC bus and the motor, shaping voltage and current so that a motion controller can impose accurate speed or position profiles on a synchronous motor. By supplying regulated three-phase output, the module supports precise axis control in packaging, pick-and-place, and general material-handling equipment. Its closed-loop operation allows the connected axis to respond to motion commands while compensating for changes in speed and mechanical load.
The current loop closes with a bandwidth of 1 kHz, allowing the drive to suppress load disturbances quickly, while the PWM transistors switch at 8.33 kHz to keep torque ripple low. A DC link rated at 560 VDC stores energy for the inverter stage. During regenerative operation, the ballast circuit activates at 720 V and disengages when the bus voltage falls to 680 V. An independent trip circuit opens at 750 V to protect the power semiconductors from excessive voltage. Continuous output reaches 8 Arms, and the drive can handle up to 16 Arms for short periods during overload conditions. It can deliver a sustained apparent power of 4.5 kVA when the connected motor has at least 5 mH of phase inductance, which helps the current controller remain stable.
The logic interface uses a Mini-Combicon connector with a 3.81 mm pitch and 12 pins, and it accepts conductors measuring up to 1.5 mm². Ten PLC I/O leads allow enable, fault, and limit signals to be exchanged without external relays. The ballast circuit engages at 720 V, holding the DC bus below the independent trip threshold during regenerative events. Thermal loss at nominal current is 100 W, so the installation must provide enough ventilation to remove heat from the enclosure. The drive has an IP20 protection rating, which guards against accidental contact with internal electrical parts but does not protect against water. Its installation weight is 7.9 kg, which must be considered when selecting the mounting surface and fastening hardware.
