WDT281 Watchdog Timer SPDT Module

It is a fact of life that a computer, hardware device or program may fail. To reduce the risk and possible damage a failure can cause, there is two possible methods (1) redundancy (2) watchdog timer. Neither method offer 100% protection, but both reduce risk or consequences of failure. Redundancy, a duplication of hardware is very expensive. On the other hand the WDT281 offers excellent protection at a very low cost. The host computer or application must communicate with the WDT281 by sending a message over the USB port. If the communication does not occur within that programmed time frame, the WDT281 will trigger a relay to change states for a programmable amount of time. This relay event can be used to trigger a warning device, turn off critical hardware or perform a system reset. There are three versions that offers solutions for differant watchdog timer applications. Model -01 the relay is open and if a time-out occurs will close. Model -02 the relay closes on power-up or when the wdt is enabled and will open it the time-out occurs or power is removed. Model -03 the relay closes only when the wdt is enabled and will open on time-out. Do you have a hardware or software application that is critical to keep running at all times? Our Watchdog modules offer excellent protection against malfunctions at a low cost. Our products can be used to monitor your critical hardware and software functions (Software and Hardware) and if an error occurs, the card automatically generates outputs that can be used to initiate corrective actions, generate alarms, or reboot your computer. Single unit cost starts at $45.5 . WDT281 Watchdog Timer SPDT  Module
Features
* USB controlled watchdog timer
* Programmable event time-out
* Reset time programmable
* SPDT Relay output change on time out
* High-Speed USB 2.0 device, USB 1.1 compatible
* Type B USB connector high-retention design
* All needed power drawn from USB port, no external power required for card
* Custom 32 and 64 bit Microsoft Windows drivers provided
* Info for linux and other OS support under software tab
Specifications
* SPDT Relay Ratings
AC Ratings: 20A @ 125VAC
Max Switch Voltage 110VDC 240VAC
Max Switched Power 3,850VA, 600W
Contact Resistance: 250mOhm Max
Relay Closing 15msec
Relay Release 8msec
* Version -01
relay open on power up
When timeout after wdt is enabled occurs relay closes
relay opens either after reset time (>0) or wdt is enabled again
* Version -02
relay closed on power up
When timeout after wdt is enabled occurs relay opens
relay closes either after reset time (>0) or wdt is enabled again
* Version -03
relay open on power up
When wdt is enabled relay closes
When timeout after wdt is enabled occurs relay opens
relay closes either after reset time (>0) or wdt is enabled again
* Watchdog timer programmable from 100millisec to 60 minutes
* Reset time programmable from 100millisec to 10 seconds or left on
* Self Powered from USB (high power Hub)
*Operating Temperature: -20 to +70 C
*Storage Temperature: -40 to +105 C
*Humidity 5% to 90% RH, without condensation
Software
Most of our customers write their own program for controlling our devices. With our provided API's you can use any programming language that supports DLL so you do not have to learn a whole new language. We provide two types of DLL api, first is the older standard DLL with both mangled calls and "C" calls. The second is the managed Class Library that supports all the new managed languages. Any programming language that supports calls to Windows DLL can also be used to control the cards. The software interface is easy to use from Visual Basic, Visual C# Visual C++ via a standard windows DLL with sample source included. Linux driver support CD available. Each module has an unique serial number string which allows multiple USB boards to be controlled by the host USB controller as individual USB devices. Click on blue tabs above to view other information about the module.
Ordering
WDT281-01 USB WDT 20Amp SPDT Mode 1 relay close on timeout Enter Qty
1-9 $45.5ea.
10- 49 $41.95ea.
50+ $38.5ea.
Add to Cart
WDT281-02 USB WDT 20Amp SPDT Mode 2 relay opens on timeout Enter Qty
1-9 $45.5ea.
10- 49 $41.95ea.
50+ $38.5ea.
Add to Cart
WDT281-03 USB WDT 20Amp SPDT Mode 3 relay closes on enable Enter Qty
1-9 $45.5ea.
10- 49 $41.95ea.
50+ $38.5ea.
Add to Cart
WDT281-EXT USB WDT 20Amp SPDT with presets and external power Enter Qty
1-9 $50.5ea.
10- 49 $46.95ea.
50+ $42.5ea.
Add to Cart
WDT281-Linux Linux Support Disk (one time purchase) Enter Qty
1-9 $30ea.
10- 49 $30ea.
50+ $30ea.
Add to Cart
*Open Connector pdf file (printable)
*Open Mechanical pdf file (printable)
*Open Interface pdf file (printable)
Software Downloads
*Download Uses WDT205 Software Complete CD ver 2.05 (zip file)
Labview Support
*Download Using Labview (pdf file)
Non-Windows OS Support (Linux and others)
*Download Using non-windows OS (pdf file)
Important readme about using dll with versions of windows .net Readme pdf
On some installations of Windows 7 and Windows 8 that are not configured to search the CD for drivers, it may show driver
not install and you need to do a manual install. If there is not yet a custom install under software downloads
you can download the pdf and zip of the generic install and copy your existing driver files from the CD, or do a manual install from PDF
Readme pdf
Generic install zip file
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J-Works,Inc
Email: sales@j-works.com
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