Com Unit for MODBUS TCP FB8211H0756.3, Com Unit for MODBUS TCP, Sensor Accessories and Others, Interface between the I/O modules and the PCS/PLC, Com unit for 80 analog or 184 digital channels, Communication via MODBUS TCP, Installation in suitable enclosures in Zone 1, Module can be exchanged under voltage (hot swap), HART communication via MODBUS TCP, Configuration via FDT 1.2 DTM