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DB9>25 Wiring for Black Box?


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#1 rwphilli

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Posted 05 February 2004 - 02:20 PM

Can anyone tell me the wiring pin-out for a 9pin serial to 25pin Black Box RS232 Interface?

#2 DGlass

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Posted 05 February 2004 - 04:43 PM

It would be a standard straight through RS-232 serial cable not a Null Modem Cable.
Be aware that we originally wrote that the Black Box Serial to 20ma Current Loop Converter, number CL090A-F, was the unit we recommended many years ago.
Just with in the last couple of weeks we found out that Black Box has changed the model to a CL1090A-F. We have not had time to test the compatibility of the newer unit yet.

#3 rwphilli

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Posted 05 February 2004 - 10:26 PM

David.  Thank you for the reply.  I understand it is not a null modem but am still not sure of pin# to pin# on the 9 to 25 pin connectors.  As near as I can figure out it may be like this 9pin > 25pin.  
2rxd>2txd, 3txd>3rxd, 5gnd>?gnd, 7rts>?cts, 8cts>?rts

Can you fill in the question marks and is anything else correct?  I have the CL090A-F boxes but do not have an information sheet in front of me.

#4 DGlass

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Posted 06 February 2004 - 02:34 PM

I have attached a .pdf file that should help you to visualize both the Computer to IQ Interface RS-232 connections as well as the IQ Interface to a Modem connections.

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