TTL interfacing to 6514

[xl600]

I have a PXI-6514 and would like to know if it can act as a direct TTL input card with no external power supply.  The user guide doesn't really make it clear if this is a supported configuration.

I'm trying to use the 6514 to detect edges (To time stamp them for latency measurement).  I don't need to timestamp at much better than a few hundred microseconds and I'm using a PXIe LabView RealTime chassis.

Thanks,

XL600

[JB · Accepted solution]

According to the specifications:

[Buechsenschuetz]

The 6514 expects signals with a level used in PLCs. You will need a level converter from TTL level to 24V level, preferrably a converter with so-called PNP outputs. I do not know your location, we are using level converters from the german manufacturer LEG. Of course these devices need a 24VDC power supply. 

https://shop.leg-gmbh.de/en/signal-converter/su1-signal-converter.html

[xl600]

That's exactly the type of signal conditioner needed.  Thanks!  I wasn't able to locate anything like this from Omega or Phoenix, especially with the low 1us latency this unit's spec show.

Another option I was looking at is:

https://www.amazon.com/Voltage-Level-Translator-Converter-24V/dp/B06XKR3YN5

But this is only good to about 20kHz and my signals are likely going to have shorter pulses than that (Though only coming in at a few hundred Hz)