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#
# Cable information for the DY-4 DMV177
#
# $Id$
#
Background
==========
All serial cables described in this file were built using RJ-45 ribbon
cables which were plugged into DB-25 or DB-9 adapters wired as described.
Matching the colors of the wires in the shell is the easiest way to
make sure the cable is built properly.
The board is configured as follows:
- An MC68681 is the first two serial ports. These are RS-232 and may
be accessed via the front panel or the P2. The front panel connector
has both A and B serial ports on a single connector. DY-4 part number
"OBYC3ASSY901132-000 Rev-" brings these ports out to two DB-25
female connectors.
- The MC68681 serial ports are also accessible on the P2 connector.
DY-4 part number "OBYC3ASSY901080-004 Rev A" brings these out
to DB-9 female connectors. These were not used in this effort.
- A Z85C30 is used for the third and fourth serial ports. These are
RS-422 and may only be accessed via the P2 connector. These are
brought out to DB-25 male connectors. An RS-422 to RS-232 converter
was used to interface with these serial ports.
References
==========
- Linux Serial FAQ
- http://ahmed.egypt.com/electronics/serial
- DY-4 Documentation
RS-422 Converter
================
An RS-422 to RS-232 converter from B&B Electronics was used to
adapt the RS-422 signals so they could be used with a normal
RS-232 serial port. Here is the information required to purchase
one of these:
RS-232/RS-422 Converter: Model 422LCON
Power Supply: Model 422PS
B&B Electronics Manufacturing Company
707 Dayton Road
PO Box 1040
Ottawa, IL 61350
Voice: (815) 433-5100
FAX: (815)434-7094
Front Panel RS-232 Connection to a PC
=====================================
Board's DB-25 PC's DB-9 Color in
Channel A COM1 Shell
============= ============ =========
RX on pin 2 TX on pin 2 Red
TX on pin 3 RX on pin 3 Blue
GND on pin 7 GND on pin 5 Black
DTR on pin 20 DTR on pin 4 Brown
No other signals are used.
RS-422 Connection to a PC
=========================
This requires two cables with the converter connecting them.
P2 RS-422 to the RS-422/RS-232 Converter
========================================
Board's Converter's Color in
DB-25 RS-422 DB-25 Shell
=============== ============== ========
TXD_A on pin 2 RDA on pin 5 Red
TXD_B on pin 14 RDB on pin 17 Blue
RX_A on pin 3 TDA on pin 2 Brown
RX_B on pin 16 TDB on pin 14 Green
GND on pin 7 GND on pin 7 Black
Converter's PC's DB-9 Color in
RS-232 DB-25 COM1 Shell
=============== ============== ========
TX on pin 2 TX on pin 2 Blue
RX on pin 3 RX on pin 3 Red
GND on pin 5 GND on pin 5 Black
DTR on pin 4 DTR on pin 4 Brown
No other signals
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