B&B Electronics PC Watchdog Timer Card ATRWDT - Manual (Page 8)

6 Documentation Number ATxWDT-1303
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
Connecting the ATRWDT Motherboard Reset Option
To use the ATRWDT to reboot the host computer, a connection
must be made from the ATRWDT to the motherboard. The jumper
wire supplied with the ATRWDT must be connected between the
MOTHEBOARD RESET PINS jumper on the ATRWDT and the
RESET pins on the host motherboard. If your computer has a
RESET switch, the switch's jumper wires should already be
connected to the motherboard reset pins. Remove the switch wires
from the motherboard pins and connect them to the
RESET
BUTTON jumper on the ATRWDT. Next connect the jumper wire to
the motherboard-reset pins. The other end is connected to the
MOTHERBOARD RESET PINS jumper on the ATRWDT. These
pins are in parallel with RESET BUTTON jumper and will allow the
ATRWDT or your RESET switch to reboot the host computer.
The polarity of the RESET JMPR is indicated on the ATRWDT
PCB but, in most cases, not on the motherboard or reset switch. If
you are unsure of how to connect the ATRWDT to the motherboard,
use the following procedure to verify the polarity of the connections.
1. Disconnect the reset switch wires from the motherboard.
2. Install the ATRWDT in an empty ISA slot in your computer.
Leave the computer cover off.
3. Connect the jumper wire provided with the ATRWDT to the
motherboard-reset pins. Leave the other end unconnected.
4. Power up the computer.
5. After the computer has booted, connect the other end of the
jumper wire to
MOTHERBOARD RESET PINS jumper of the
ATRWDT.
6. Remove the wires from MOTHERBOARD RESET PINS jumper.
7. If your computer does not reboot, the polarity was correct. If the
computer
did reboot, reverse the connection made to
MOTHERBOARD RESET PINS jumper of the ATRWDT.
8. Follow the same procedure to connect the RESET switch wires
to
RESET BUTTON jumper of the ATRWDT.
NOTE: Use caution when operating the computer with the case
open. Be sure to ground yourself by touching the metal case of the
computer before you handle any components inside the machine.