SELV - power supply specification

Jul 07, 2005 4 Replies

Hello i bought a development board frm the ARM. It says that for safety use SELV (safety extra low power supply). Whats mean by SELV. Can i use home made power( using 7805 and 3.3V zener) supplies insted of SELV.



In article , vssumesh writes

SELV only describes the user safety aspects of the supply, you can use any mains isolated supply that meets the voltage and current requirements of the board.

fred

Thanks fred .... So i can go ahead with my own deisgn basd on 7805and zenar. is there any noise or regulation requirements in SELV.

In article , vssumesh writes

"SELV only describes the user safety aspects of the supply"

fred

:Hello i bought a development board frm the ARM. It says that for safety :use SELV (safety extra low power supply). Whats mean by SELV. Can i use :home made power( using 7805 and 3.3V zener) supplies insted of SELV.

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