Steve M. Taylor wrote:
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How do I monitor sensors to make sure they are still valid ?

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Really, how can I know if it the sensor is dead or alive, esp. when it is nothing more than an On/Off switch.

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Will it handle the idiot who tests the system with a Megger (earth leakage tester)

Will it handle an idiot that connects it to a three phase supply ?

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In those cases, the sensors would get damaged and it can also be fatal to my system if they are not isolated (right?). So, I realised its better to provide opto isolation.

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How will you screen for conducted interference, how do you stop your cables to the sensor from radiating ?
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I did not quite understand this. The cables Radiate what? Is there something else I should take care in my System so that it does not get effected from any radiations?

Regards,
Harsha


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when everything fails, read the instructions/datasheet. :)
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