expansion module: warranty : 5 years; binary input, connected to common potential: 4.0; binary input, not connected to common potential: 0. 0; terminal A, mounting position 1: current 4x protection; terminal B, mounting position 1: current 3x protection, 1x sensitive; Ethernet electrical ETH-BA-2E L: 0; Ethernet optical ETH-BB-2FO: 0; rated frequency terminal: 50 Hz / 60 Hz; rated frequency terminal slot 01: 50 Hz / 60 Hz; front design: standard; high-speed relay, NO contact: 0.0;