In the production halls of a grindery, leakages in the pipe system have already occurred on repeated occasions. In one case, when the pipe fracture occurred at the weekend, the damage was not discovered until the start of the early shift on the following Monday. Although the rupture in the pipe was not particularly large, the water volumes which leaked into the hall over time did cause considerable damage.
An easy-upgrade solution was sought to alarm a technical-services employee in an emergency - preferably via cellular phone.
The solution
The IT service provider who had already installed the networking of the CNC grinders immediately discerned that the existing network infrastructure could be used if the W&T Web-IO were deployed.
The details
1. First of all, the mobile telecommunications provider was requested to enable e-mail reception for text messaging to the technician’s cellular phone.
2. Ground moisture sensors, which in an emergency transmit a signal via a floating contact, were connected to the digital inputs of a Web-IO.
3. The Web-IO was plugged into a free Ethernet port and connected to a power supply.
4. An IP address was assigned to the Web-IO.
5. Via the browser, the Web-IO was configured in such a way that an e-mail is sent to the cellular-phone-specific e-mail account of the technician if one of the ground-moisture sensors signals a problem.
The network infrastructure and the gateway to the Internet had already been installed in the company’s IT for other applications.
Of course, the alarm can also be sent to any other e-mail mailbox if that is desired.
All sensors/devices that have a floating contact or output a signal between -30 V and +30 V DC (switching threshold limit of 8 V +/-1 V) can be connected as triggers of an alarm. Other kinds of signals can be fed via relays.
