Charging cable PC S03, USB Charging Cable for Smart-Ex 02, Ex-Handy 10 and Pocket Unit PU-Ex V01, Communication, 1-channel, Plugs directly in to field side of KF modules, Analog or digital signal inputs, Surge protection up to 10 kA, Protects leads 1, 2 and 3 of KF modules, Uninterruptable operation (auto reset), Up to SIL 3 acc. to IEC/EN 61508