06-19-2019 09:08 AM - edited 06-19-2019 09:10 AM
Hi Everybody,
I am using Labview FPGA modules. I want to trigger 5V relay. I have got a NI-9401. This is 8 channel 5V TTL digital out module. But my relays isn't triggering with TTL signal.
Briefly, How Can I Use my TTL Signal to Generate a non-TTL Digital Signal?
Have a nice day!
06-19-2019 10:25 AM
What relay are you using. Generally, relays need a good amount of current in order to switch. DIO generally cannot source that much current (2mA for the 9401 from what I can gather from the datasheet). So you may need to add a buffer circuit to get the current draw you need.
06-20-2019 12:26 AM
Hi,
I am using relay in attachment. I think this problem is about inadequate current. You are right. Well, may I do buffer circuit with Labview? Or is the buffer circuit only hardware? Can you help me ?
06-20-2019 06:15 AM
That is quite a bit of coil current. You may need a buffer chip and something like a Solid State Relay to control that relay properly. Something like a SN74ACT245PWR buffer chip with a DO061A SSR should do the job.
06-20-2019 06:42 AM
Thank you for your advice