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The reliable PC Watchdog technology by QUANCOM® is now also available for the PCI-Express bus. The Watchdog card monitors a PC for software or hardware lock-ups to ensure 24/7 system availability. It provides a solution for Telecom, ISPs, Webservers, Voice Mail, File Servers, and Industrial systems that occasionally lock up but must be available on a continuous basis. We designed a board that is a Plug & Play compatible PCI-Express watchdog card.

The cards are equipped with drivers for the following operating systems: Microsoft Windows 7 / Vista / XP / 2000 / Server 2k-2008 R2 NT 4.x / 95 / 98 / 3.1, DOS and Linux. There are sample projects ( sources ) for the main compilers and interpreters i.e. Visual-C++, Visual-Basic, Borland Delphi, LabView, LabWindows, Sun Java and even MS Excel or MS Access are supported.

For Microsoft Windows 7 / Vista / XP / 2000 / Server 2k-2008 R2 a additional NT service (WDSERV.EXE) is supplied which works as a background process. The WDSERV is a watchdog software addon for machines that require 24 h availability. The WDSERV Windows 7 / Vista / XP / 2000 / Server 2k-2008 R2 service executes the nescessary accesses on the QUANCOM watchdog in the background. After a system crash, the system will be rebooted automatically. The program works totally in the background, so nobody has to be logged on at the machine.

The Watchdogs are supported by the QLIB (QUANCOM Driver Library), and therefore allows an easy programming under various operating systems. To support developers we included a driver installation toolkit for OEM manufacturers or software developers. The sources and executable for the Linux backgound program are included on the CD-Rom.

For PC Motherboards that doesn't have a reset pin on the board, you can select the PWDOG2N or the USB Watchdog 2. These watchdogs support the ATX Adapter Cable that can be connected between the motherboard and the cable from the ATX power supply. It allows a PC to be reset by momentarily removing the Power Good signal from the power supply to the motherboard.
In the scope of delivery there are many useful software applications and libraries. The software to use depends on the used operating system or your application. To access the hardware following possibilities exist :
• Method 1: WDSERV - Standalone Solution for 24/7 Windows 7 / Vista / XP / 2000 / Server 2k-2008 R2 and NT Systems ( this software is running as background service )
• Method 2:Install the QLIB for use with existing software ( i.e. Sitekiosk Kiosk Browser Software )
• Method 3:High-Level Programming ( Visual-Basic, Visual-C++, Borland Delphi, Borland C++, ...) with the QLIB, that provides a common API to the programmers.
• Method 4:Direct I/O - Access the hardware registers directly, all operating systems, recommended only for professional programmers
• Method 5:LINUX Drivers, Daemon and Source Files included, QUANCOM URL Checker for the Apache Webserver.
• Method 6:DOS Standalone program ( Watchdog.exe - TSR DOS program - )

Method 1 is the preferred method if the complete system is to be monitored and the operating system is Windows NT4.x or Windows 2000. The WDSERV monitors the system and programs the Watchdog in the background and no user needs to be logged on.

Method 2 allows you to make the QUANCOM watchdog running with existing software. I.e. the Sitekiosk Kiosk Browser Software. Sitekiosk offers you an almost infinite number of possibilities to configure your Internet terminal according to your needs. It offers you all the functions to operate a secure terminal. Because of some software problems and the possibility of a BSOD ( blue screen of death ) the manufacturer protects the terminal software with an optional hardware watchdog plugin.

With Method 3 you can integrate the watchdog in your own application. To do this in Visual-C, Visual-Basic, Delphi, LabWindows/CVI or any other compiler or interpreter, first install the QLIB. Then copy the file QLIB.H, QLIB.BAS or QLIB.PAS to your source project files. These files belong to the QLIB and you find them in the "include" directory of the QLIB Installation. If you are using compilers like Visual-C or Borland Delphi you have to add the library file QLIB32.LIB to your project. The compiler needs this file to find the references to the QLIB32.DLL, which holds the programming API. Interpreters like Visual-Basic don't need this library. Now the programmer can use the API functions QAPIWatchdogEnable() to activate the watchdog, QAPIWatchdogDisable() to disable it, and QAPIWatchdogRetrigger() to reset the internal watchdog timer. When you start your application activate the watchdog with QAPIWatchdogEnable(). While the program is running, continously call the function QAPIWatchdogRetrigger(). This signals the watchdog that the application is alive. When the application crashes it can't call the function and the watchdog restarts the system. Before terminating your application, call the function QAPIWatchdogDisable() to shut down the watchdog.

If you use Method 4 you need the sources for the application. You have to access the hardware registers directly with i/o commands and you are responsible to add the programming statements in the application. For using this method knowledge in programming drivers is necessary. See the documentation for a complete discussion of the hardware registers.

Method 5 is used on Linux systems. There is a Linux Driver and a Watchdog Daemon download below and the sources for these programs are included. This allows recompiling the sources when the linux version changes. You may also incorperate the linux functions from the watchdog daemon to your linux application. The daemon is a program that opens the watchdog driver as a file "dev/watchdog" and then continously writes a char to driver. This resets the internal watchdog timer of the watchdog hardware. Secondly we provide the Webserver URL Checker Application that can check multiple Webservers. It sends a http request to the server, recognizes the received pattern of the "http" response and restarts the system on failure.

Method 6 is used for DOS and Windows 3.x operating systems. It is a watchdog TSR program for DOS systems and has the same functionality like the NT Service WDSERV.



•Internal Timebase
50 MHz

•Temperature Range
5...50 °C

QCLI (QUANCOM Command Line Interface)
The QUANCOM Command Line Interface (QCLI) was made for all those which don´t have programming experience or knowledge.

It is a simple command line tool which makes it able to control our I/O and Watchdog boards with some very simple strings.

Note that this procedure is not as fast as a programm written in a higher programmiung language, for example C.
[Download 56KB]

QCLI (QUANCOM Command Line Interface)
Das Quancom Command Line Interface (QCLI) ist für diejenigen gedacht, die sich in der Programmierwelt nicht zurechtfinden, oder auch keine Lust haben sich ein eigenes Programm für den Zugriff auf unsere QUANCOM Karten zu schreiben. Da das QCLI recht simpel gehalten ist, ist es um ein wesentliches langsamer, verglichen zu einem gut programmierten Programm. Mit einfachen Funktionen der QAPI lassen sich über das QCLI QUANCOM Karten und Module bedienen und konfigurieren. [Download 32.1KB]

QCLI QUANCOM Command Line Interface
( Windows Executable )

QUANCOM QCLI provides the user with a simple to use command line tool to control QUANCOM hardware.

[ Further Information to QCLI ]

[ Online-Documentation to QCLI ]

[Download 56KB]

manufactured D-SUB cable 9pol.

230Volt solid state relay for DIN rail assembly

Terminal Block for D-Sub 9 pin Cable

Universelle PLC-Baureihe mit Wechslerrelais

Universelle PLC-Baureihe mit Wechslerrelais

Watchdog ATX Cable

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193.99 Euro
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Operating Systems
Windows 10/8/7 (32/64)
Windows Vista (32/64)
Windows XP (32/64)
Windows 2000
Win Server 2008/2012 (32/64)
Win 2003 Server (32/64)
Win 2000 Server
Windows 95/98/Me
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Updated on 13.6.2015 by Michael Reimer