CODESYS 2 Programmable Gateway for the BL20 I/O System. Interface for Modbus TCP. Ident. no.: 6827309. Rotary coding switch to adjust the node address. Protection class IP20. 2 x end brackets BL20-WEW35/2-SW. 1 x end plate BL20-ABPL. Integrated power supply. LEDs for display of supply voltage, group and bus errors