LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 
Reply

TTL signal with NI 9381 device

TTL signal with NI 9381 device

Hi,

 

I want to control a TTL input with the NI 9381. It allows you using a digital output.

 

I have measured the output signal and it was 2.8 V. The control has failed and I think that 2.8 is not enough to control a TTL input.

 

The device specifications:

Output high, VOH Sourcing 100 µA..................2.7 V

 

Could anybody help me?

0 Kudos
Message 1 of 4
(1,019 Views)

Re: TTL signal with NI 9381 device

What is the specification of your signal sink?
What do you want to drive with your digital output?
Best regards,
GerdW
CLAD expired, using 2009SP1 + LV2011SP1 + LV2017 (+LV2018 sometimes) on Win7+cRIO
Kudos are welcome Smiley Wink

0 Kudos
Message 2 of 4
(990 Views)

Re: TTL signal with NI 9381 device

Hi GerdW, thank you for answer.

 

I want to turn on and off an equipment. The equipment manual says: The voltage applied to the REMOTE BNC connector must not exceed 5.5 V.

 

So, I want to send 0 or 1 (0 or 5 V) to turn on and off.

 

I do not know if I have answered your question. If have not done, ask me again, please.

 

Best regards

0 Kudos
Message 3 of 4
(983 Views)

Re: TTL signal with NI 9381 device

Hi srglzal,

 

when you want a 5V output signal you should

- at first read the manual, especially page 20, with the specifications of your module

- then build a small amplifier to convert from LVTTL to TTL levels…

 

RTFM!

Best regards,
GerdW
CLAD expired, using 2009SP1 + LV2011SP1 + LV2017 (+LV2018 sometimes) on Win7+cRIO
Kudos are welcome Smiley Wink

0 Kudos
Message 4 of 4
(921 Views)