Power supply systems for transport safety systems

This article presents the requirements for the use of power supply systems in electronic safety systems for transport purposes. The author also presents real-world solutions most commonly encountered for powering electronic safety systems in a broad context, including backup power, which comply with current standards.1. INTRODUCTION
Every electronic device, including all electronic safety systems, requires power sources. “Low-responsibility” electronic systems (including some electronic safety systems) may have a power supply system with limited parameters. Due to the specific nature of power supply systems for transport safety, they must be designed with redundancy and possess very high operational and reliability parameters. These can be single power supply systems (without backup sources) in specific cases.
Higher-class electronic safety systems (from III to IV) require power sources with technical parameters that guarantee reliable operation. These are most often dual sources, i.e., primary power (~230V AC) and backup power (=12V DC or =24V DC). There are also cases of ~24V AC power supply.
However, let us return to the genesis of power supply devices. A device whose task is to convert alternating current energy (including alternating current) into direct current is called a DC power supply. It is worth considering the basic functions performed by a power supply. (…)

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