[GreenKeys] Does anyone have any experience using the L-Com RS232 to Current Loop Converter with a Mod 33 Teletype?

[john at toebes.com]

Ok I've gotten my Current Loop Converter adapter (
http://www.l-com.com/serial-converters-controller-cards-economy-rs232-to-cur
rent-loop-converter-with-4-pin-terminal-block

) and what I thought was the obvious way of connecting it doesn't seem to
result in success.  

 

I've connected 

1 <-> TTY Send pin 3

2 <-> TTY Send pin 4

3 <-> TTY Receive Positive Pin 7

4 <-> TTY Receive Negative Pin 6

 

Switches:

20ma                         DCE

RX Passive               TX Passive

 

I've got a nice RS232 Mini-Tester with LEDS to give me a good indication of
communication and every combination of Null modem/RS232 Gender changer
available, connecting it to a USB->RS2-2 adapter.

 

So far I've not had any success getting an indication that things are
communicating.  Has anyone else used this particular converter with success
and can offer any advice?

 

Thanks in advance!

*	John Toebes

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