In the OBO V25-B + C / 3 + NPE remote communication based on the increased contact function. 
 Fs remote signal alarm device is mainly used in the installation in unattended or difficult to check the location of the surge protector for centralized monitoring, remote communication through the OBO FS alarm device, even if living in the control center can easily understand the working conditions of mine . 
 FS function of each zone are equipped with a surge protector control module continuously checks all the connected surge protection module is working. If a surge protector module fails, the FS will be monitoring mechanism of micro-switch inside the module to send commands. Then, the control module of the normally open and normally closed contacts into a normally closed and normally open, sent to the remote fault information and a corresponding display or sound device. 
 OBO surge protection V 25-B + C is not only able to withstand high flow capacity of the lightning current, but also has characteristics of low-voltage protection, can be used as a B + C joint protection uses. 
 Installation: 
 Fs devices and surge protectors are grouped together, and install surge protection only and fixed with any standard 35mm rails can be. As the use of non-screw terminal crimping, which is especially convenient connection in the project.