ETEL DSO‑PWS111B‑000C Power Supply Board

The ETEL DSO‑PWS111B‑000C (also referenced as 1130E‑070‑018) is a dedicated power supply board designed to provide stable, regulated DC power for ETEL motion control systems, including servo amplifiers, controllers, and auxiliary modules. It is a key component of ETEL’s DSO series rack systems, converting an AC input (120/230 VAC, 50/60 Hz) into multiple DC output voltages required for logic, motor bus, and I/O circuits. This board ensures reliable operation of the entire motion control system, with robust protection features and high efficiency.

The power supply delivers a main high‑voltage bus of +300 VDC (up to 20 A) for motor power stages, as well as low‑voltage outputs: +24 VDC (5 A) for control logic and I/O, +5 VDC (2 A) for digital circuits, and ±15 VDC (1 A) for analog sections. Each output is independently regulated and filtered to minimize ripple and noise, ensuring stable performance of sensitive electronics. The board incorporates a soft‑start circuit to limit inrush current during power‑up, extending the life of components and reducing stress on the AC supply.

Protection features include over‑voltage clamping on each output, over‑current limiting, short‑circuit protection, and thermal shutdown with automatic recovery. An integrated EMI filter and surge suppressor meet industrial EMC standards (IEC 61000‑4‑2, -4‑4, -4‑5), preventing interference from and to other equipment. The board also includes a remote voltage sensing input to compensate for voltage drops in cabling, ensuring accurate regulation at the load.

Mechanically, the DSO‑PWS111B‑000C is designed for insertion into a standard ETEL DSO rack, with a compact footprint of 200 mm x 120 mm. It connects via a robust backplane connector and is secured with screws. The front panel provides LED indicators for each output (green for normal, red for fault), a mains input fuse holder, and a power switch. Cooling is by natural convection, though a fan can be added for higher ambient temperatures.

This power supply board is widely used in industrial automation systems where ETEL servo drives are deployed, including CNC machining centers, robotic workcells, packaging lines, and semiconductor manufacturing equipment. Its ability to power multiple modules from a single unit simplifies cabinet wiring and reduces overall system cost. The board is compatible with all ETEL DSB2, DSCD, and DSA2 series amplifiers.

Installation involves inserting the board into the rack, connecting the AC input leads (with proper earth grounding), and verifying output voltages with a multimeter. The board supports hot‑swapping only when the system is designed for it; otherwise, power down before replacement. Regular maintenance includes checking fan filters (if installed) and ensuring ventilation openings are clear. The board’s high‑quality components and conservative derating ensure a long service life, with a MTBF exceeding 50,000 hours.

ETEL provides comprehensive documentation including schematic diagrams, component layout, and test procedures. Technical support is available for integration and troubleshooting. The DSO‑PWS111B‑000C is CE and UL recognized, ensuring compliance with international safety and performance standards.

In summary, the ETEL DSO‑PWS111B‑000C power supply board is a reliable, efficient, and versatile power source for ETEL motion control systems, delivering clean and protected power to ensure consistent performance in demanding industrial environments.