
B & B ELECTRONICS

3PXSD4A, 3PXSD4B

Card Type   Serial
Chipset     16550A (3PXSD4A)

            16750 (3PXSD4B)
I/O Options Serial ports (4)
Data Bus    8/16 bit ISA

[Image]

                                CONNECTIONS

        Function             Label            Function            Label

  RS-232, RS-422, or          P1       RS-232, RS-422, or          P3
  RS-485 serial port 1                 RS-485 serial port 3

  RS-232, RS-422, or          P2       RS-232, RS-422, or          P4
  RS-485 serial port 2                 RS-485 serial port 4

                        USER CONFIGURABLE SETTINGS

                   Setting                      Label        Position

     RS-485 receiver disabled when             JP3/B        Pins 1 & 2
      transmitting on port 1                                  closed

      RS-485 receiver always enabled on         JP3/B        Pins 2 & 3
      port 1                                                  closed

      RS-485 transmitter for port 1 enabled     JP3/D        Pins 2 & 3
      on high RTS only                                        closed

      RS-485 transmitter for port 1 enabled     JP3/D        Pins 1 & 2
      whenever transmission is attempted                      closed

      RS-422/485 termination enabled on         JP3/E        Pins 1 & 2
      port 1                                                  closed

      RS-422/485 termination disabled on        JP3/E        Pins 2 & 3
      port 1                                                  closed

     RS-485 receiver disabled when             JP4/B        Pins 1 & 2
      transmitting on port 2                                  closed

      RS-485 receiver always enabled on         JP4/B        Pins 2 & 3
      port 2                                                  closed

      RS-485 transmitter for port 2 enabled     JP4/D        Pins 2 & 3
      on high RTS only                                        closed

      RS-485 transmitter for port 2 enabled     JP4/D        Pins 1 & 2
      whenever transmission is attempted                      closed

      RS-422/485 termination enabled on         JP4/E        Pins 1 & 2
      port 2                                                  closed

      RS-422/485 termination disabled on        JP4/E        Pins 2 & 3
      port 2                                                  closed

     Serial port clock speed normal             JP5         Pins 1 & 2
                                                              closed

      Serial port clock speed multiplied by      JP5         Pins 2 & 3
      4                                                       closed

      Status register enabled                    JP6         Pins 1 & 2
                                                              closed

      Status register disabled                   JP6         Pins 2 & 3
                                                              closed

     RS-485 receiver disabled when             JP7/B        Pins 1 & 2
      transmitting on port 3                                  closed

      RS-485 receiver always enabled on         JP7/B        Pins 2 & 3
      port 3                                                  closed

                    USER CONFIGURABLE SETTINGS (CONT)

                   Setting                      Label         Position

      RS-485 transmitter for port 3 enabled     JP7/D        Pins 2 & 3
      on high RTS only                                         closed

      RS-485 transmitter for port 3 enabled     JP7/D        Pins 1 & 2
      whenever transmission is attempted                       closed

      RS-422/485 termination enabled on         JP7/E        Pins 1 & 2
      port 3                                                   closed

      RS-422/485 termination disabled on        JP7/E        Pins 2 & 3
      port 3                                                   closed

     RS-485 receiver disabled when             JP8/B        Pins 1 & 2
      transmitting on port 4                                   closed

      RS-485 receiver always enabled on         JP8/B        Pins 2 & 3
      port 4                                                   closed

      RS-485 transmitter for port 4 enabled     JP8/D        Pins 2 & 3
      on high RTS only                                         closed

      RS-485 transmitter for port 4 enabled     JP8/D        Pins 1 & 2
      whenever transmission is attempted                       closed

      RS-422/485 termination enabled on         JP8/E        Pins 1 & 2
      port 4                                                   closed

      RS-422/485 termination disabled on        JP8/E        Pins 2 & 3
      port 4                                                   closed

     Serial port 1 uses normal interrupt       JP11/A       Pins 1 & 2
      set by JP8                                               closed

      Serial port 1 uses shared interrupt       JP11/A       Pins 2 & 3
      set by JP8                                               closed

     Serial port 2 uses normal interrupt       JP11/B       Pins 1 & 2
      set by JP13                                              closed

      Serial port 2 uses shared interrupt       JP11/B       Pins 2 & 3
      set by JP8                                               closed

     Serial port 3 uses normal interrupt       JP11/C       Pins 1 & 2
      set by JP7                                               closed

      Serial port 3 uses shared interrupt       JP11/C       Pins 2 & 3
      set by JP8                                               closed

     Serial port 4 uses normal interrupt       JP11/D       Pins 1 & 2
      set by JP15                                              closed

      Serial port 4 uses shared interrupt       JP11/D       Pins 2 & 3
      set by JP8                                               closed

     Interrupt sharing disabled                 JP16        Pins 1 & 2
                                                               closed

      Interrupt sharing enabled                  JP16        Pins 2 & 3
                                                               closed

                        SERIAL PORT 1 CONFIGURATION

  Setting    JP1/A    JP1/B    JP1/C    JP1/D    JP3/A    JP3/B    JP3/C

  RS-232     Pins 2   Pins 2   Pins 2   Pins 2    N/A      N/A     Pins 2
              & 3      & 3      & 3      & 3                        & 3

  RS-422     Pins 1   Pins 1   Pins 1   Pins 1   Pins 2   Pins 2   Pins 1
              & 2      & 2      & 2      & 2      & 3      & 3      & 2

  RS-485     Pins 1   Pins 1   Pins 1   Pins 1   Pins 1    See     Pins 1
              & 2      & 2      & 2      & 2      & 2     note      & 2

            Note:For correct settings of JP3/B for RS-485 mode, see its
            entry in the User Configurable Settings table.

            Pins designated are in the closed position.

                        SERIAL PORT 2 CONFIGURATION

  Setting    JP2/A    JP2/B    JP2/C    JP2/D    JP4/A    JP4/B    JP4/C

  RS-232     Pins 2   Pins 2   Pins 2   Pins 2    N/A      N/A     Pins 2
              & 3      & 3      & 3      & 3                        & 3

  RS-422     Pins 1   Pins 1   Pins 1   Pins 1   Pins 2   Pins 2   Pins 1
              & 2      & 2      & 2      & 2      & 3      & 3      & 2

  RS-485     Pins 1   Pins 1   Pins 1   Pins 1   Pins 1    See     Pins 1
              & 2      & 2      & 2      & 2      & 2     note      & 2

            Note:For correct settings of JP4/B for RS-485 mode, see its
            entry in the User Configurable Settings table.

            Pins designated are in the closed position.

                        SERIAL PORT 3 CONFIGURATION

  Setting    JP9/A    JP9/B    JP9/C    JP9/D    JP7/A    JP7/B    JP7/C

  RS-232     Pins 2   Pins 2   Pins 2   Pins 2    N/A      N/A     Pins 2
              & 3      & 3      & 3      & 3                        & 3

  RS-422     Pins 1   Pins 1   Pins 1   Pins 1   Pins 2   Pins 2   Pins 1
              & 2      & 2      & 2      & 2      & 3      & 3      & 2

  RS-485     Pins 1   Pins 1   Pins 1   Pins 1   Pins 1    See     Pins 1
              & 2      & 2      & 2      & 2      & 2     note      & 2

            Note:For correct settings of JP7/B for RS-485 mode, see its
            entry in the User Configurable Settings table.

            Pins designated are in the closed position.

                        SERIAL PORT 4 CONFIGURATION

  Setting    JP10/A   JP10/B    JP10/C   JP10/D    JP8/A   JP8/B   JP8/C

  RS-232     Pins 2   Pins 2    Pins 2   Pins 2    N/A      N/A    Pins 2
              & 3      & 3       & 3      & 3                       & 3

  RS-422     Pins 1   Pins 1    Pins 1   Pins 1    Pins     Pins   Pins 1
              & 2      & 2       & 2      & 2      2 & 3   2 & 3    & 2

  RS-485     Pins 1   Pins 1    Pins 1   Pins 1    Pins     See    Pins 1
              & 2      & 2       & 2      & 2      1 & 2   note     & 2

            Note:For correct settings of JP8/B for RS-485 mode, see its
            entry in the User Configurable Settings table.

            Pins designated are in the closed position.

                      SERIAL PORT INTERRUPT SELECTION

  Setting     JP12/A    JP12/B    JP12/C     JP12/D    JP12/E     JP12/F

  IR/FONT>    Closed     Open      Open       Open      Open       Open

    IRQ3       Open     Closed     Open       Open      Open       Open

    IRQ4       Open      Open     Closed      Open      Open       Open

    IRQ5       Open      Open      Open      Closed     Open       Open

    IRQ6       Open      Open      Open       Open     Closed      Open

    IRQ7       Open      Open      Open       Open      Open      Closed

   IRQ10       Open      Open      Open       Open      Open       Open

   IRQ11       Open      Open      Open       Open      Open       Open

   IRQ12       Open      Open      Open       Open      Open       Open

   IRQ14       Open      Open      Open       Open      Open       Open

   IRQ15       Open      Open      Open       Open      Open       Open

                  SERIAL PORT INTERRUPT SELECTION (CONT)

   Setting       JP12/G      JP12/H      JP12/I      JP12/J      JP12/K

   IR/FONT>       Open        Open        Open        Open        Open

     IRQ3         Open        Open        Open        Open        Open

     IRQ4         Open        Open        Open        Open        Open

     IRQ5         Open        Open        Open        Open        Open

     IRQ6         Open        Open        Open        Open        Open

     IRQ7         Open        Open        Open        Open        Open

    IRQ10        Closed       Open        Open        Open        Open

    IRQ11         Open       Closed       Open        Open        Open

    IRQ12         Open        Open       Closed       Open        Open

    IRQ14         Open        Open        Open       Closed       Open

    IRQ15         Open        Open        Open        Open       Closed

            Note:JP12 sets the interrupt for port 1. The settings for
            JP13 through JP15 are identical and set the interrupts for
            ports 2 through 4, respectively.

                       SERIAL PORT ADDRESS SELECTION

  Setting     SW1/1    SW1/2    SW1/3   SW1/4    SW1/5    SW1/6    SW1/7

    000h       On       On       On       On       On       On       On

    008h       Off      On       On       On       On       On       On

    010h       On       Off      On       On       On       On       On

    018h       Off      Off      On       On       On       On       On

    020h       On       On       Off      On       On       On       On

    2E8h       Off      On       Off     Off      Off       On      Off
  (COM4:)

    2F8h       Off      Off      Off     Off      Off       On      Off
  (COM2:)

    3D8h       Off      Off      On      Off      Off      Off      Off

    3E0h       On       On       Off     Off      Off      Off      Off

    3E8h       Off      On       Off     Off      Off      Off      Off
  (COM3:)

    3F0h       On       Off      Off     Off      Off      Off      Off

    3F8h       Off      Off      Off     Off      Off      Off      Off
  (COM1:)

            Note: A total of 128 base address settings are available. The
            switches are a binary representation of the decimal memory
            addresses. SW1/7 is the Most Significant Bit and switch SW1/1
            is the Least Significant Bit. The switches have the following
            decimal values: SW1/7=512, SW1/6=256, SW1/5=128, SW1/4=64,
            SW1/3=32, SW1/2=16, SW1/1=8. Turn off the switches and add
            the values of the switches that are off to obtain the correct
            memory address. (Off=1, On=0)

            SW1 sets the address for port 1. The settings for SW2 through
            SW4 are identical and set the addresses for ports 2 through
            4, respectively.

