Base Backplane FB9262BP24110.2, Bus coupler, Sensor Accessories and Others, Base backplane for FB system, Max. 24 slots for I/O modules, Installation in Zone 1, For PROFIBUS, MODBUS RTU or MODBUS TCP, For PROFIBUS, PROFINET, MODBUS RTU or MODBUS TCP, MRP and S2 redundancy, HART communication via HART-IP