Due to a loose connection in the lower distribution, power failures occurred in the server room on repeated occasions. The UPS continued supplying the server with power. Because the UPS was not integrated into the network management system, nobody knew about the power failures and after the rechargeable batteries of the UPS had run down, the servers simply crashed. This resulted in data loss and file-system errors.
Of course, the loose connection was repaired but, for the future, a possibility of integrating the UPS into the network management system was sought.
The solution
The IT manager simply connected the floating contact of the UPS, via which a warning light is normally connected, with an input of the Web-IO. In the case of power failure, the Web-IO now transmits an SNMP trap thus notifying the IT department which can perform a controlled shut down of the servers in the case of a failure.
The details
1. The floating contact of the UPS was connected with an input of the Web-IO.
3. The Web-IO was plugged into a free Ethernet port and connected to a power supply.
4. The Web-IO was assigned an IP address.
5. Via the browser, the Web-IO was configured in such a way that an SNMP trap is issued if the floating contact of the UPS closes.
To trigger alarms, it is also possible to connect any sensors/ devices which have a floating contact or output a signal between -30 V and +30 V DC (switching threshold limit of 8 V +/-1 V). Other kinds of signals can be switched on via relays.
