Extension Backplane LB9024BP24300.1, Suitable components, LB (Zone 2, Class I/Div. 2), Backplane for LB-System, Fieldbus type determined by base backplane, Max. 24 slots for I/O modules, 5 SIL 2 output shutdown segments, Redundancy (power supply), Mounting in Zone 2, Class I/Div.2 or in the safe area, Non-volatile memory for configuration and parameter settings