RS232 on pxie-8100 RT

[dana_ornim]

Hi,

 

I'm designing RS232  using pxie-8100 RT.

 

is the rs232 design and configuration is different between Labview RT and regular Labview ?

 

cause the same rs232 design doesn't work on the RT labview...

[JKSH]

Hi,

 

1. Please show your code.
2. Did you install NI-Serial on your RT target?
3. What do you mean by "doesn't work"?

[dana_ornim]

Hi,

 

I wrote a write/read code on labview:

1. connected an external loopback to PXI  and it worked fine.

2. connected cable to my development board - didn't work at all. I checked logic voltage levels: the PXI outputs 12V Pk-Pk, while my development board outputs 5V Pk-Pk.

That must be the issue. what do you recommend?

 

Thanks,

Danna

[Tim_S]

RS232 can be from +3 to +15 volts, to -3 to -15 volts (6V pk-pk to 30V pk-pk... see Wiki article). Issues with RS232 are usually mismatch of serial port configuration between the two ends or mis-wired/broken cable.

[infinitenothing]

Maybe the dev board is talking TTL levels and you need a level shifter? Something like this: https://www.sparkfun.com/products/449