TUMPA rs-232 problem.

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[deleted]

I have a project I am try to work on using TUMPA for rs-232. The problem is rs-232 doesn't seem to work for me. If i set all the rs-232/TTL jumpers to the top row I get nothing on the rs-232 header or de-9, i have tried to do a loopback test and nothing comes back in the terminal. If i set the jumpers to the bottom row the everything works fine on the TTL header and a loopback test outputs what I type in the terminal.
So question is, is there something wrong with my TUMPA or is there something I am missing to enable the rs-232 header besides moving the jumpers?

[deleted]

No one has any idea why the TTL outputs would work but not the rs-232 outputs even though the jumpers are set correctly?
Is there a way to actually contact customer or tech support or is this forum all we have?

[deleted]

I can recommend you to open support ticket at http://www.csbooth.com for fast, traceable response.
TIAO Corp doesn't provide phone support at this moment.

mitchell486

I have never tested loopback output from the RS232 outputs, I will test this tonight to see what might be required.

mitchell486

I did test this last night and the RS232 Loopback test did not output any results like I would expect. I'm not sure if I'm missing something either.... Any feedback on that port of the TUMPA would be greatly appreciated.

[deleted]

If loopback test fails, there is something serious.
I can recommend you to open support ticket at http://www.csbooth.com for fast, traceable response.
TIAO Corp welcomes any questions, suggestions, opinions and complaints.

mitchell486

Well when I have the jumped pins on TTL-OUT instead of RS232-OUT, loopback works fine. If I have it on RS232 though, loopback does not work in the same manner that TTL does. Maybe I'm just missing something with that loopback test?
EDIT: I don't have the hardware with me at the moment so I can't test, but I think I just did the RS232 loopback test incorrectly. I will try to follow the pinout on this guide. http://www.ni.com/tutorial/3450/en/

[deleted]

Yes, it is different for DE-9 (DB9) Connector; for proper loopback test, you need to short;

Receive (RX) Data pin with Transmit (TX) Data pin
Request To Send (RTS) pin with Clear To Send (CTS) pin
Data Set Ready (DSR) and Data Terminal Ready (DTR) pins with Received Line Signal Detector (Data Carrier Detect)

using jumper wires etc.
see also: http://airborn.com.au/serial/rs232.html
you can also purchase Loopback test plugs there.
Thanks!