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
Custom 32 and 64 bit Window drivers provided
Linux support CD available

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 close for a programmable amount of time. The WDT281 is designed to plug into an internal USB port meeting the Intel Front Panel I/O Connectivity Design Guide for a USB port. This relay event can be used to trigger a warning device, turn off critical hardware or perform a system reset.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. Any programming language that supports calls to Windows DLL can also be used to control the module. The software interface is easy to use from Visual Basic, Visual C# Visual C++ via a standard windows DLL with sample source included. 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.

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

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

The module utilizes a custom function driver optimized for a maximum device functions and data throughput. Windows driver provided supports Windows 2000/XP/Vista/Windows7 for both 32bit and 64bit systems. The user API interface to the driver is via standard window DLL's both as a managed class library and older standard DLL. The CD contains sample programs and source code in Visual Basic, Visual C++, Visual C# for Windows. Third party support includes a Windows standard DLL interface usable from the most popular application programs and includes LabVIEW, MS Office, and MathLab. Click on manual and software tab above to download software for review.

USB Connector

The industrial/military marketplace has driven the need for USB connections to be reliable, dependable, and unfailing. Used in all of our USB products is a type B USB connector which features a high retention design. This connector complies with the class 1, Div II minimum withdrawal requirement of over 3 pounds of force (15 Newtons). The connectors orange color-coded insulator differentiates it from standard USB connectors.

Warranty

Prior to shipment all J-Works products are thoroughly inspected and tested to applicable specifications. For a period of 3 years after product shipment all products originally manufactured by J-Works which are found to be defective will be repaired or replaced subject to the following. If a product is suspected of failure, contact J-Works customer service (email: support@j-works.com). Please include product module number, serial number and a description of the failure. J-Works may suggest some simple tests, or have additional questions to confirm the failure. We will assign a Return Material Authorization (RMA) number which must included with return package. All products should be properly packed for handling and ESD and returned with freight prepaid to the J-Works service location with provided RMA number and will be returned to the customer's site freight prepaid (COD). Under this Warranty, liability of J-Works is limited to replacing, repairing or issuing credit (at J-Works discretion) for any products which is found to be defective during the warranty period. In no case is J-Works liable for consequential or special damage arriving from use or misuse of a J-Works' products. The customer is responsible for all repair costs caused by modifications or additions to our products not approved in writing by J-Works, or if the product has been subject to abnormal use. Abnormal use for the purposes of this warranty is defined as any use that exceeds the specification of the product. Other than the above, no other warranty, expressed or implied, shall apply to any products supplied by or sold by J-Works.

J-Works,Inc

Web Site: www.j-works.com Email: sales@j-works.com

11024 Balboa Blvd. Ste 402, Granada Hills, CA 91344

Voice Msg (818)364-0915 Fax (818)364-0912

Fastest contact method is via EMAIL sales@j-works.com

Page Last Updated May 4, 2011

Model Number	Description	Lead Time	Cost Each	Qty 10-49	Qty 50-99	Order Qty
WDT281-01	USB WDT 20Amp SPDT	3 days	$45.5	$41.95	$38.5
WDT281-EXT	USB WDT 20Amp SPDT with presets and external power	3 days	$50.5	$46.95	$42.5
WDT281-Linux	Linux Support Disk (one time purchase)	Stock to 3 days	$30	$30	$30
Accessory Items
The following items are offered as a customer convenience, there are many sources of compatible products
EXT-5	External Power Supply for model -EXT	3 days	$18	$18	$18
AY-AB-01	USB Cable (1 foot)	Stock	$4.25	$4.00	$3.75
AY-AB-03	USB Cable (3 foot)	Stock	$4.50	$4.25	$4.00
AY-AB-06	USB Cable (6 foot)	Stock	$5.00	$4.75	$4.25
AY-AB-10	USB Cable (10 foot)	Stock	$5.50	$5.25	$4.75
AY-AB-15	USB Cable (15 foot)	Stock	$8.50	$8.00	$7.25

For order quanities of 10 or more, usb test cables and software CD's do not ship with order. CD's can be requested by email

For a safe and secure payment transaction all purchases are processed through PayPal. You are not required to create a PayPal account to pay by credit card, they are just our secure method for all credit card tranactions. Depending on current factory backlog, products shown as "stock" will ship within 2-3 business days. Priority is given to "next day" and "2 day" shipments. Near the end of the checkout process, selection of shipping method can be made. For the US, they are Ground, 2 day and next day. For international orders, not all countries have shipping rates, if order is placed with $0.00 for shipping, we will contact you with actual shipping rate with a request for payment. Please contact factory by email if you have any other special shiping requirements. On international order FedEx and customs require a local phone number, please provide, otherwise your order can be delayed, while we contact you for the information. Lead time shown are updated periodically and are subject to change without notice. If an order cannot be shipped within given lead time you will be notified by email. All orders are shipped from Granada Hills, CA USA.

J-Works,Inc

Web Site: www.j-works.com Email: sales@j-works.com

11024 Balboa Blvd. Ste 402, Granada Hills, CA 91344

Voice Msg (818)364-0915 Fax (818)364-0912

Fastest contact method is via EMAIL sales@j-works.com