Terminal, iPo plug connection, installation terminal, PE/L/L, 2.5mm², gray Terminal block connection technology for various industrial applications and modern building installations from Siemens. Regardless of whether you choose screw, tension spring, push-in or quick connection: All connection technologies can be freely combined with one another. The labeling and testing accessories are standardized and can be used across the board. With SIEMENS terminal blocks, many applications in industrial, commercial and residential construction can be realized. This means you have the right connection technology for every connection. Siemens terminal blocks are characterized above all by: 1. Permanently secure contact. 2. Easily detachable connection of electrical connections such as cables and lines. 3. Realization of a wide range of applications. 4. Convenient and simple assembly and connection technology. 5. Extensive and standardized accessories. 6. Reliable safety during installation thanks to standard touch protection. 7. Optimum technology for your safety - only from Siemens.