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#
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# Cable information for the DY-4 DMV177
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#
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# $Id: cable.doc,v 1.5 1998/07/18 16:56:16 joel Exp $
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#
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Background
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==========
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All serial cables described in this file were built using RJ-45 ribbon
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cables which were plugged into DB-25 or DB-9 adapters wired as described.
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Matching the colors of the wires in the shell is the easiest way to
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make sure the cable is built properly.
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The board is configured as follows:
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- An MC68681 is the first two serial ports. These are RS-232 and may
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be accessed via the front panel or the P2. The front panel connector
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has both A and B serial ports on a single connector. DY-4 part number
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"OBYC3ASSY901132-000 Rev-" brings these ports out to two DB-25
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female connectors.
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- The MC68681 serial ports are also accessible on the P2 connector.
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DY-4 part number "OBYC3ASSY901080-004 Rev A" brings these out
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to DB-9 female connectors. These were not used in this effort.
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- A Z85C30 is used for the third and fourth serial ports. These are
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RS-422 and may only be accessed via the P2 connector. These are
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brought out to DB-25 male connectors. An RS-422 to RS-232 converter
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was used to interface with these serial ports.
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References
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==========
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- Linux Serial FAQ
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- http://ahmed.egypt.com/electronics/serial
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- DY-4 Documentation
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RS-422 Converter
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================
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An RS-422 to RS-232 converter from B&B Electronics was used to
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adapt the RS-422 signals so they could be used with a normal
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RS-232 serial port. Here is the information required to purchase
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one of these:
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RS-232/RS-422 Converter: Model 422LCON
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Power Supply: Model 422PS
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B&B Electronics Manufacturing Company
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707 Dayton Road
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PO Box 1040
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Ottawa, IL 61350
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Voice: (815) 433-5100
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FAX: (815)434-7094
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Front Panel RS-232 Connection to a PC
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=====================================
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Board's DB-25 PC's DB-9 Color in
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Channel A COM1 Shell
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============= ============ =========
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RX on pin 2 TX on pin 2 Red
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TX on pin 3 RX on pin 3 Blue
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GND on pin 7 GND on pin 5 Black
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DTR on pin 20 DTR on pin 4 Brown
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No other signals are used.
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RS-422 Connection to a PC
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=========================
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This requires two cables with the converter connecting them.
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P2 RS-422 to the RS-422/RS-232 Converter
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========================================
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Board's Converter's Color in
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DB-25 RS-422 DB-25 Shell
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=============== ============== ========
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TXD_A on pin 2 RDA on pin 5 Red
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TXD_B on pin 14 RDB on pin 17 Blue
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RX_A on pin 3 TDA on pin 2 Brown
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RX_B on pin 16 TDB on pin 14 Green
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GND on pin 7 GND on pin 7 Black
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Converter's PC's DB-9 Color in
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RS-232 DB-25 COM1 Shell
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=============== ============== ========
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TX on pin 2 TX on pin 2 Blue
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RX on pin 3 RX on pin 3 Red
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GND on pin 5 GND on pin 5 Black
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DTR on pin 4 DTR on pin 4 Brown
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No other signals
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