Appendix C. Udb Setting - Black Box AC1000A User Manual

Appendix C. UDB Settings
The single-port serial transmitters and single-port and dual daisychainable serial
receivers contain an internal Universal Digital Board (UDB) that can be
reconfigured from its simplex operation default setting for bidirectional
operation.
The UDB hardware configuration is done via jumper settings. These jumpers are
used to route signals to the interface port(s) for the DB9 connector and to
configure the transceiver for RS-485 operation.
To access the UDB on these transmitter and receivers:
1. Make sure the unit is powered OFF.
2. If necessary, unplug all cables to the unit.
3. Unscrew the top screw as well as the two set screws in the DB9 connector. Lift
the cover off.
For reference Table C-1 shows the input/output jumper configuration for the DB9
connector as it's currently pinned on the board.
Table C-1. Input/output configuration on DB9 connector.
RS-232 Transmit Assembly
JP-1 J2 Pin
Y1-A1 1
Y2-A2 6
Y3-A3 2
Y4-A4 7
Y5-A5 3
Y6-A6 8
Y7-A7 4
Y8-A8 9
Y9-A9 5
Table C-2 shows the jumper settings for the serial data mode configuration. By
default, the UDB is set for simplex operation.
Signal
RS-232 DCD
RS-232 DSR
RS-232 RD
RS-232 RTS
RS-232 TD
RS-232 CTS
RS-232 DTR
RS-232 RI
Gnd
APPENDIX C: UDB Settings
RS-232 Receiver Assembly
JP-1 J2 Pin
Y1-A1 5
Y2-A2 9
Y3-A3 4
Y4-A4 8
Y5-A5 3
Y6-A6 7
Y7-A7 2
Y8-A8 6
Y9-A9 1
Signal
Gnd
RS-232 RI
RS-232 DTR
RS-232 CTS
RS-232 TD
RS-232 RTS
RS-232 RD
RS-232 DSR
RS-232 DCD
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