NI card digital output voltage configuration

[branly20173]

Hello, I would like to associate my card NI 6001 to a relay card which is ordered in GPIO (notice:

https://produktinfo.conrad.com/datenblaetter/75000-99999/095843-da-01-en-STEUERKARTE_MIT_RELAIS_5V_1...)

Unfortunately, I just noticed that the Relay Relay Card has a high state of 3.7 V.

Except my NI card only delivers 3.3V digital output, which does not activate relays.

My question: Would it be possible to reconfigure the digital outputs of the Ni card to send 3.7V?

thanks in advance

[EricIBIS]

The card needs about 20mA for each input. Even if you managed to get 5V out the 6001 can't deliver the current (4mA max).

[SteveD123]

You will need a level converter & line driver. These may need to be separate, but a quick look at the 74HCT240 indicates that it may do what you need (V input high minimum =2.0 volts, 20 mA output current per pin). Farnell have them for about 0.5 UK Pounds each, so you can afford to experiment.

Datasheet is here: http://cdn-reichelt.de/documents/datenblatt/A240/74HCT240_74HCT241_74HCT244%23STM.pdf

[EricIBIS]

A ULN280x series Darlington Transistor Arrays will also do the job.
There are a lot of relayboards which use them.

https://www.ti.com/lit/ds/symlink/uln2803a.pdf

For example: https://www.mikroe.com/relay4-board