[Premium-Rx] Racal 6790/GM remote connector

[Karl-Arne Markström]

I would prefer not to disassemble the ribbon connector on the cable assembly,
but instead make a new cable with a 24 pin header on the board end.

The pin connections in the 24 pin header (A6A1W1) are as follows (from the R-2174A(P)/URR manual):

1    RS-232 data out
2    Logic ground
3    No connection (RS422 data out)
4    Logic ground
5    RS-232 data in
6    Logic ground
7    RS-232 data return (strap to logic ground for RS-232)
8    Logic ground
9    Receiver address digit 1, bit 0 (LSB)
10  Receiver address digit 1, bit 1
11  Receiver address digit 1, bit 2
12  Receiver address digit 1, bit 3 (MSB)
13  Receiver address digit 2, bit 0 (LSB)
14  Receiver address digit 2, bit 1
15  Receiver address digit 2, bit 2
16  Receiver address digit 2, bit 3 (MSB)
17  Parity select
18  Even/odd parity select
19  Baud rate select bit 3 (MSB)
20  Baud rate select bit 2
21  Baud rate select bit 1
22  Baud rate select bit 0 (LSB)
23  Logic ground
24  Logic ground

If you mount miniature hex-coded or rocker switches, connected to the address/select lines,
on the panel that houses the DB-9 connector, you get the convenience of switch selected communications parameters and receiver address.

73/

Karl-Arne
SM0AOM



















----- Original Message ----- 
From: "Gordon & Lois Duff" <glduff at bellsouth.net>
To: <premium-rx at ml.skirrow.org>
Sent: Sunday, January 23, 2005 11:38 PM
Subject: [Premium-Rx] Racal 6790/GM remote connector


> I want to install a DB9 connector in place of the 26 pin connector on the A6
> board.  I would like to make the change "reversible"  
> 
> Does the 3m connector at W1 come apart easily so that I could put in a new
> ribbon cable?  I would plan to fabricate a new aluminum bracket to support
> the A6 board and hold the DB9 connector.  If this works, I might add a
> couple of switches to set the baud, parity, etc.  What can anyone tell me
> about W1?
> 
> Gordon, KA2NLM 
> 
> 
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