Can I build relay using an AO-210 module?

[Clara G]

I want to construct a relay that can be used for changing  8 connections simultanoeusly. I have an electronic load that I would like to continuously move between the 8 input connections, plugging it out from one and in to the next at the same time.

I am going to control the relays from Compact Fieldpoint (cFP 1808 backplane) using LabVIEW. I have seen that there are relay mosules for cFP, but I wonder if I can use an AO module instead? I have an AO-210 module that I would like to use, is it possible to programmatically build a relay with this?

I am grateful for any help or advice!

[RavensFan]

I'm sure you could.  You would just have to check on the specifications for your relay.  What voltage does it require?  How much current does it draw?  If it is less than 10 mA and the coil is 10V or less, then you should be able to.  You would just program either 0V output or 10V (assuming 10V coil) depending on whether you want off or on.

[Clara G]

This is a follow-up on a pretty old post, but it took me a while to actually have time to do this!

I have no changed the setup so that the AO-210 module will control 8 relays on a printed circuit board. I want to sent a 10 V signal to one of the 8 output terminals at a time, in a pattern that I can specify and change. That is, I want to send a signal to only one terminal at a time.

I have now connected the Vout on each channel to the corresponding relay. But what should I do with the COM? I read in the manual that they were all connected, and also connected to the C terminal, so I connected the C terminal to the common ground on the PCB. This was apparently a mistake since this triggers all of the relays at once (resulting in a very high output current).

Does anyone have any suggestions on how to do this? I am not that familiar with this so it is probably a stupid wiring mistake.

My relays are rated at 12 V, but with 70% of this as "must operate voltage" so it should work?

Thanks for any help!

Clara