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Is negative on 2420 connected to earth ground?

Models 2400, 2401, 2410, 2420, 2425, 2430, 2440, 6430
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rajmunna
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Joined: January 10th, 2012, 12:37 pm
Country: United States

Is negative on 2420 connected to earth ground?

Post by rajmunna » January 10th, 2012, 1:35 pm

Hi,

Is 2420 -ve of input/output supply pins connected to earth ground? If so how can it be disconnected?

Thanks
Raj

Nathan S
Keithley Applications
Keithley Applications
Posts: 254
Joined: February 28th, 2011, 6:17 am
Country: United States
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Re: Is negative on 2420 connected to earth ground?

Post by Nathan S » January 10th, 2012, 1:52 pm

The Lo Input/Output of the 2400 line is not connected to earth ground. It is spec'ed at >1 GOhm Common Mode Isolation. You can certainly tie it to ground externally if you choose, but it is designed to float up to 250Vpeak away from earth ground.

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