Product Overview
The Ansaldo 211QS50003B is a specialised power trigger board engineered by Ansaldo for use in industrial power conversion and excitation control systems, where it functions as the critical interface between the control layer and the SCR/thyristor power stage. Positioned within Ansaldo’s broader 211-series power electronics family, the 211QS50003B generates precisely timed, synchronised gate pulses that fire the thyristors in converter bridges, ensuring accurate phase-angle control of the AC-to-DC power conversion process. This control precision directly governs the output voltage and current delivered to the load, making the board essential for the stable operation of excitation systems, DC drives, and rectifier installations.
As a member of the Ansaldo power trigger board family, the Ansaldo 211QS50003B operates from a bipolar ±15V DC auxiliary supply and produces six synchronised output channels, each delivering 8–15V DC trigger pulses at a repetition rate between 5 and 10 kHz with a pulse width adjustable across 120° to 180° per cycle. This multi-channel architecture allows a single board to drive a complete three-phase thyristor bridge, providing the coordinated firing sequences required for balanced, low-ripple DC output and stable generator field excitation.
The value of the Ansaldo 211QS50003B lies in its role as a proven lifecycle replacement part for the extensive installed base of Ansaldo excitation and drive systems still operating in power generation, petrochemical, metals, and heavy industrial environments worldwide. Because the module has been discontinued by the manufacturer, availability is now concentrated with specialist automation distributors who maintain tested stock for in-kind replacement. Certified to international quality standards and shipped in sealed anti-static packaging, the 211QS50003B continues to serve operators who need to extend the service life of proven Ansaldo power conversion assets without the cost and risk of full system migration.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 211QS50003B |
| Manufacturer | Ansaldo |
| Product Type | Power Trigger Board / Module Power Trigger Board |
| Supply Voltage | ±15V DC bipolar auxiliary |
| Output Channels | 6 pulse outputs (three-phase bridge configuration) |
| Pulse Amplitude | 8 – 15 V DC |
| Pulse Repetition Rate | 5 – 10 kHz |
| Pulse Width | 120° – 180° per cycle (adjustable) |
| Operating Voltage (Field Side) | 220 V |
| Output Frequency Rating | 50 kHz |
| Mounting | DIN rail or screw-mounted within converter/excitation panel |
| Operating Temperature | 0 °C to +70 °C |
| Relative Humidity | ≤ 90 % non-condensing |
| Dimensions | 12.7 cm × 5.1 cm × 12.7 cm |
| Weight | Approx. 0.1 kg (board); approx. 2.5 kg with packaging |
| Country of Origin | USA / Italy |
| Availability | Discontinued by manufacturer; stocked as lifecycle replacement |
