RAD DATA COMMUNICATIONS

CMN-C423/422

Card Type         Serial interface converter
Chipset           Unidentified
I/O Options       Serial port
Maximum Data Rate 19.2Kbps
Data Bus          Proprietary

[Image]

                                CONNECTIONS

          Function            Label            Function            Label

  RS-423 DTE serial data       CN1     Ground                       SC1
  port

  RS-422 DCE serial data       CN2     Test mode switch             SW1
  port

                        USER CONFIGURABLE SETTINGS

                  Setting                       Label        Position

  »   Receive line connected with 100 ohm        JP1         Pins 2 & 3
      impedance                                               closed

      Receive line not connected with 100        JP1         Pins 1 & 2
      ohm impedance                                           closed

  »   Test switch enabled                        JP2         Pins 1 & 2
                                                              closed

      Test switch disabled                       JP2         Pins 2 & 3
                                                              closed

                          DIAGNOSTIC LED(S)

    LED        Color      Status               Condition

    PWR        Green        On                Power is on

    PWR        Green        Off               Power is off

     TD       Yellow        On         Modem is transmitting data

     TD       Yellow        Off      Modem is not transmitting data

     RX       Yellow        On          Modem is receiving data

     RX       Yellow        Off       Modem is not receiving data

    TST         Red         On           Modem is in test mode

    TST         Red         Off        Modem is not in test mode

                       MISCELLANEOUS TECHNICAL NOTE

  This card is intended for use in the CMN-16 rack-mount system. The bus
  is used only for supplying power for the card. All other card functions
  are accessed through the serial port.