Phoenix Contact 2715856 A terminal block designed for initiating or controlling devices typically features a 24-volt nominal voltage and can handle a maximum of 24 amps of current through its connections, utilizing a screw-based connection method with a rated cross-sectional area of 2.5 square millimeters. The actual wire sizes used can vary between 0.2 to 4 square millimeters, while the terminal block itself is designed for mounting on the NS 35/7.5 and NS 35/15 types, with an overall color designation as gray.