[GreenKeys] RS232 to Loop Converter

[larryradio at att.net]

Herb et.al.,

Re:  CL050 Black Box

I asked for the schematic....they said they'd send me papers to sign for a non-disclosure agreement...when signed, they'd send the print.

Never sent anything!  I should try again.

lar
  ----- Original Message ----- 
  From: Herb Graeber 
  To: greenkeys at mailman.qth.net 
  Sent: Monday, December 22, 2008 12:20 PM
  Subject: [GreenKeys] RS232 to Loop Converter


Thanks to Jack and Bob.  The manual can be downloaded fromwww.blackbox.co.uk/technical/manuals/C/CL050.pdf (Just don't ask anyone for a schematic.)73...Herb K5HGJack wrote:
> ZCZC
> 
> There's an item on Ebay (380084222466) that is made by Black Box.
> It is an RS232-to-current-loop converter and the selling
> price is $5.00 with 10 available. I "won" a few of these
> last year and just got around to playing with them. (Since then,
> I have also obtained a couple of related items: one unit has
> 16 converters in it and the other box has 8 in it...I'm set for
> life!)

If you know the Black Box part numbers, you may still be able to find 
the documentation for them. They have manuals for many of their older 
devices in PDF files on their web site, or a request to their support 
line may produce a hard copy. I used to be on their mailing list, as we 
resold assorted converter boxes from them for many years. I don't know 
how many Telco Line Bridges, line drivers and RS232->485 converters we 
have bought and installed in the 22 years I have been working with them.

Bob McConnell
N2SPP


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