175N2122 by Danfoss

The 175N2122 is a decentralized AC drive manufactured by Danfoss as part of the FCD 300 Micro Drives series. This unit mounts directly on machinery rather than in a cabinet, freeing panel space and shortening motor leads. It converts fixed-frequency mains to a variable output frequency so pumps, conveyors, or fans run only as fast as the process requires, trimming energy use while keeping speed under control. In production lines that are reconfigured frequently, the compact enclosure and quick-disconnect wiring support rapid installation without special tools. This arrangement also helps keep wiring localized on the machine, which is useful on modular handling systems and conveyor sections.

The drive housing carries an IP66 rating, preventing dust ingress and withstanding high-pressure washdown in wet zones. Real-time commands are exchanged over Profibus DP V0/V1 12 Mbaud, giving deterministic control plus acyclic diagnostics through the same link. The power stage can supply up to 0.75 kW of adjustable electrical output, which corresponds to 1.0 HP. It accepts a three-phase input of 3x380-480 V, rectifies it, and feeds the motor with pulse-width-modulated voltage to match the demanded torque and speed profile. That combination supports networked speed control in systems where operating status and diagnostic data must be available to a central controller.

Electromagnetic compatibility is addressed by an integral 1 A filter that attenuates conducted emissions, eliminating the need for separate RFI components in most installations. The drive is intended for a processing application, so its acceleration, deceleration, and restart settings suit continuous-throughput equipment. The unit is extended with a brake, permitting controlled stopping and energy dissipation during rapid deceleration cycles. Field wiring enters through a wall-mount box with metric threads, which provides a protected terminal chamber. A standard coating on the aluminum housing helps resist cleaning chemicals, and a display connector is available for a remote keypad during setup or service.