Base unit suitable for all I/O modules of the base unit type "U0", can be recognized by the laser inscription on the front and/or the last two digits of the article number, current carrying capacity per process terminal (terminal 1 to 16)|The base unit opens up a new potential group. the self-assembling voltage buses P1, P2 and the auxiliary busbar are disconnected from the adjacent module on the left (base unit, interface module, CPU)|No access to the auxiliary busbar via terminals|16 terminals to the process|Connection system in the form of push-in terminals|Without auxiliary terminal