Product Description:

The DC-S1A is a regulated DC power supply unit from Okuma in the DC Power Supplies series for multi-axis CNC installations. Serving as the central link between the machine tool's mains rectifier and its servo amplifiers, the module delivers a common DC bus that simplifies wiring and stabilizes energy distribution across the machine during synchronized motion. It is intended for installation in electrical cabinets of machining centers and lathes where precise servo performance and repeatable axis response depend on a steady intermediate-circuit voltage.

The housing measures 21.0 cm in height, 48.0 cm in length, and 11.0 cm in width, so it fits a narrow, tall compartment without displacing other motion, drive, or I/O modules in the cabinet. Sized for productivity machines, the converter can energize as many as 6 axes when coupled to the matching BL-D15A/30A/50A/75A/150A servo amplifiers for coordinated feed systems. This pairing consolidates the rectification stage, meaning the individual amplifiers draw from a common intermediate circuit instead of rectifying AC independently, which reduces component count and simplifies thermal management. The slender profile also shortens the DC link conductors, limiting voltage drop during rapid load changes and aiding servo stiffness.

The wiring scheme aligns with 2-axis through 6-axis control configurations, so the same supply can support several machine layouts while keeping the DC bus arrangement consistent. Internally, a stacked architecture with a DC-PS board and DC-S*A unit handles rectification and smoothing, which helps reduce electromagnetic noise on the link. Its role as a DC supply for BL-D drives keeps regeneration energy on the common bus instead of sending it back to the mains. This helps maintain bus stability when multiple connected axes accelerate or decelerate in quick succession.