B & B ELECTRONICS

ATRWDT, ATXWDT

Card Type               Watchdog timer card
Chip Set                None
Maximum Onboard Memory  Unidentified
I/O Options             Serial port
Hard Drives supported   None
Floppy drives supported None
Data Bus                16-bit ISA
Card Size               Full-length

[Image]

                                CONNECTIONS

        Function            Label            Function           Label

  9-pin serial port           J2       Reset button               J4
                                       connector

  Motherboard reset           J3       ATX power supply          ATX
  connector                            connector

                        USER CONFIGURABLE SETTINGS

               Function                    Label            Position

  Normal relay enabled                    JP1/A-B      Pins 1 & 2 closed

  Timer relay enabled                     JP1/A-B      Pins 2 & 3 closed

  Note: If normal relay is enabled, the relay will discharge normally and
  will energize after the timeout is reached. If timer relay is enabled,
  the relay will be energized while the timer is running and discharge
  after the timeout is reached, disabled, or the power is turned off.

                        BASE I/O 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

    3D8h       Off     Off       On      Off      Off      Off      Off

    3E0h       On       On      Off      Off      Off      Off      Off

    3E8h       Off      On      Off      Off      Off      Off      Off

    3F0h       On      Off      Off      Off      Off      Off      Off

    3F8h       Off     Off      Off      Off      Off      Off      Off

                                   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 to obtain the correct memory
  address. (Off=1, On=0)

                       MISCELLANEOUS TECHNICAL NOTES

  To enable the ATR version of the watchdog timer card to reboot the main
  board, they must be connected. The mother board reset connector on the
  watchdog timer card can be connected to the reset pins on the main
  board or the reset button connector of the watchdog timer card can be
  connected to the jumper wires of the main board’s reset switch.