EMF of pxi 2535

[木虫]

I'd like to know the general emf value of relays in PXI 2535. It says they have a typical Thermal EMF specification of < 50 uV. This seems high and I would like to the typical emf under general condition. On the other hand I'd like to konw which swtich has DPST relays? Thanks.

[王晓建]

Hi,

Maybe PXI-2598 is the DPST device that you are looking for.

Xiaojian Wang

[EricS.]

The 2535 specifications do not have a Thermal EMF listed.  It is a FET switch that has a typical offset voltage of 10uV, which has virtually the same effect as a thermal EMF on an electromechanical switch.

Xiaojian, if you're intrested, 木虫 and were talking in another thread and from that discussion it does not seem like he is looking for an RF switch. 

Also, the relays on the 2598 are actually a form of a latching SPDT.  As you can see in the schematic, when the top coil is activated in it connects 1-2 and 3-4.  When the bottom coil is energized the throw rotates both connections at the same time to connect 1-3 and 2-4.