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 further conducts the potential group, the self-assembling voltage buses P1 and P2 and the auxiliary busbar are connected to the left hand neighboring module (base unit)|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