B&B Electronics ATRWDT, ATXWDT manual General Information Introduction, Features, Specifications

Chapter 1: GENERAL INFORMATION

Introduction

B&B Electronics' Watchdog Timer (WDT) Cards, Models ATRWDT and ATXWDT, are hardware devices designed to overcome the dangers or annoyances associated with a PC "locking up." Your software periodically resets the WDT. If the watchdog doesn't receive the reset trigger within a software selectable timeout period, the WDT resets the computer. The ATRWDT uses the reset pins from the motherboard to reset the computer, where as the ATXWDT uses the ATX power supply to turn off the computer then turn it back on 10 seconds later. A form C relay output is also provided on both models to reset an external device if desired. This relay may be set to energize when the timeout is reached, or energize during normal operations.

Features

•Software selectable timeout period from 0.5 to 512 seconds

•Software enable and disable

•Form C relay output to control external device

•Write back timeout verification

•Reset flag for ATRWDT

•Non-splicing connection to motherboard reset pins for the

ATRWDT

•Non-splicing connection to the ATX power supply for the

ATXWDT

Specifications

Dimensions:	2.6" H x 4.1" L
Address:	0 to 3F8h
Power Consumption:	1.75 W maximum
Output specs:	Form C relay output, maximum ratings
	24 VDC at 1.0 A
	115 VAC at 0.5 A
Connector:	DB-9 male

Documentation Number ATxWDT-1303 1

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