Is this a safe combination for USB-6212

[walter-donovan]

USB-6212 going out through SC-2345. I want to drive relays on a SC-2062 board. Plan is to run a (probably custom) cable out of the SC-2345 and wire the digital outputs straight through inside the 2345.

1) Will the USB-6212 drive the relays without overloading?

2) The 5v demands of the SC-2062 are too great for the USB-6212 right? I must use power from the SC-2345?

I have read the specs on all these boards but am not sure if I read them correctly. I dont want to turn $$$ into scrambled eggs.

[Margaret F.]

Hello,

Judging from the specs of the 6212 and the relays, it looks like you should be able to accomplish your application. However, since this is somewhat customized, I can't say with certainty that you will be able to drive the relay, but according to the specs, you should be fine. Hope this helps!

[walter-donovan]

Thank you Margaret. I am a little confused by your answer because of the "looks fine.... can't say". You say customized but actually I am using a NI DAQ board, NI signal conditioner and want to buy a NI relay board. The only custom part to this whole system is one cable end because I don't think there's a mating connector available as a panellette for the SC-2345.

Could you clarify your hesitation that I would be able to drive the relay? The relay would be driven by the USB-6212 digital output. Since the 6212 has only one single 68 pin connector for I/O I must jump from the board terminals inside the SC-2345 to a panelette connector (likely a DB-9 or something). I would have a cable with a DB-9 to a 26 pin between the SC-2345 and the SC-2062. This is my intention. I would however take the 5v power for the SC-2062 from the SC-2345 rather than the DAQ board because the latter is supplied through USB while the former has a built in power supply. Is this OK?

[Margaret F. · Accepted solution]

Hello,

My only hesitation was with the custom cable. It is possible that you could introduce enough impedance through the cable that you could not driver the relay. However, the specs of the 6212 can handle driving the relay, so as long as you build a cable that does not introduce alot of impedence, this should work fine. Hope this helps!

[walter-donovan]

It helps fine. Actually the cable will be an NI cable with one end replaced so I guess it will work as intended. Thanks much for the help.