Explosion-proof watchdog timer

This Explosion-proof device is a USB-controlled watchdog timer. When installed across a DC power cable, it can cut and restore the power whenever the control application fails to contact it.

The typical application is to power-cycle a crashed computer. As long as the control application running on the the computer contacts the device on a regular basis, the power stays on. If, for some reason, the application stops contacting the device, the power is cut for a short time. This causes the computer to reboot. 

The integration of this watchdog into existing solutions is easy, thanks to the fact that it does not require any device driver. The watchdog timer can be reset either using a command line.

You can also use this device as a cheap solid-state relay. Please note that this device is not isolated: the output and the USB share the same ground.

This device can be connected directly to an Ethernet network, to a WiFi network and to a GSM network using special adapters.

Note: To use the Ex watchdog timer in a hazardous area, the device must be protected to at least IP 65, so it must be placed inside the enclosure.

Ex watchdog timer don’t require any special drivers or software. Compatible with Windows, Mac OS, Android and Linux and easy to drive from a maximum of programming languages.

The Ex watchdog timer is connected through an industrial USB 2.0 connector to an intrinsically safe barrier Ex USB 2.0.

The Ex watchdog timer a “hot-plug” function which allows them to be connected and disconnected without stopping, shutting down or rebooting the system.

Specifications:

USB connector: micro-B

Channels: 5

Width: 20mm

Length: 36mm

Weight: 6g

Max current (Cont.):4A

Max working voltage:12V

Protection class, according to IEC 61140: class III

Supported Operating Systems: Windows, Linux, Mac OS, Android

Сompliance: IP 65, RoHS

Electrical Data:

Uo=5 V

Io=50 mА

Ui=5 V

Ii=50 mА

Ci=10 µF

Ex marking:

Ex ib I Mb

Ex ib IIC T6...T4 Gb X

Ex tb IIIC T85°C...135°C Db

Produced in accordance with IEC 60079-0, IEC 60079-11, IEC 60079-31

Normal operating temperature: 5°C to 40°C

Extended operating temperature*: -30°C to 85°C

*Note: The extended temperature range is defined based on components specifications and has been tested during a limited duration (1h). When using the device in harsh environments for a long period of time, we strongly advise to run extensive tests before going to production.

The scope of delivery implies:

Explosion-proof watchdog timer