Product Description:

The 131B2671 is an AC variable frequency drive manufactured by Danfoss for the VLT FC 301 Automation Drives series. The unit regulates the speed of induction motors used in conveyors, pumps, and other factory machinery by adjusting its output frequency and voltage. This electronic control method allows motor speed to follow process demand without relying on mechanical throttling devices. Its compact form supports installation near other automation components in distributed control systems while providing the power conversion required for basic speed-regulated applications.

The drive accepts a 380–480 VAC input and operates with three-phase power, allowing direct connection to compatible industrial distribution systems. Its inverter stage provides 0.55 kW of continuous shaft power for the connected motor. An integrated thermal model monitors operating load and helps protect the power stage from excessive thermal stress. The internal EMC filter reduces conducted electrical noise that could otherwise travel through the supply wiring and affect nearby equipment. The enclosure is rated IP20, which protects against contact with hazardous internal parts and entry by larger solid objects. Because this rating does not provide protection against water, the drive should be mounted inside a ventilated cabinet that remains dry and limits exposure to contamination.

Motor and supply cabling enters the housing through a standard gland plate, providing an organized path for field wiring. The selected cable glands and cabinet layout should provide suitable strain relief and preserve adequate separation between power and control conductors. The drive has an uncoated control board, so its installation area should be free from condensation, corrosive fumes, and other contaminants that could damage exposed electronic surfaces. The unit is supplied with no brake chopper, so it cannot internally manage regenerative energy through a switched braking resistor during rapid deceleration. Applications with high-inertia loads or frequent stopping may therefore require an external method of controlling returned energy. No local control panel keypad is included, so operating commands and parameter access must be provided through the available control connections or a compatible external interface.