Emerson SP3403

The Control Techniques Unidrive SP3403 AC Drive is a high-performance solution designed for demanding industrial applications. As part of the renowned Unidrive SP series, this modular drive offers unparalleled flexibility and precision. It operates in five distinct modes: Servo for high-dynamic precision control, Open-loop vector for standard induction motors, Closed-loop vector for precise control with motor feedback, V/Hz (scalar) for simple motor speed control, and Regen for regenerating energy back to the power source.

The SP3403 model, identified by its Frame Size 3, is designed for 380-480V AC three-phase input and typically supports a power rating of 4 kW / 5 HP in normal duty applications. Its modularity is a standout feature, with three option module slots available for adding advanced functionalities such as feedback devices (encoders, resolvers), I/O expansion, and various industrial communication protocols including PROFIBUS and EtherNet/IP.

This drive is a legacy product, having been succeeded by the modern Unidrive M series, specifically the M700 series from Nidec Control Techniques. Despite being a legacy product, the Unidrive SP3403 remains a reliable and versatile choice for complex industrial environments.