Simatic S5 powersupply problem

Hello everyone

I need to know how to replace the 6es5 951-7lb21 power supply blown fuse.. please help

Best regards

Hello M. Abubaker;

The power supply you are pointing to is a 3A P.S. for the S5-115U/F family. You can find its data sheet as part of this manual (chapter 17):

https://support.industry.siemens.com/cs/ww/en/view/1086946

Notice that the information on this module states that the fuse is "integral", which means it is a solid-state fuse, installed on the printed circuit board. You can either attempt to open the power supply yourself, find the blown fuse and replace it, or send the unit to Siemens (or a competent repair shop) for repairs. 

Note that opening the cover of a Siemens module will void the warranty; but for a product is Spare Parts for over 10 years that should not bother you too much...

Hope this helps,

Daniel Chartier

Hello Mr dchartier 

This is indeed very helpful. Thank you for your support.