Siemens SIMATIC ET 200SP Manual page 61

Properties
● BaseUnit suitable for all I/O modules of the BaseUnit type "D0". Can be recognized by the
last two digits of the article number.
– Current-carrying capacity per process terminal (terminal 1 to 12): Max. 5 A
● The BaseUnit conducts the potential group further. The self-assembling voltage buses P1
and P2, and the AUX busbar are connected to the left-hand neighboring module
(BaseUnit).
● No access to the power and AUX busbars via terminals
● 12 terminals to the process (assignment with the I/O module)
● Connection method using push-in terminals
Note
The shield connection (shield support and shield terminal) is not intended for BaseUnit
BU20-P12+A0+0B and must not be installed.
BaseUnits (6ES7193-6BP.../3RK1908-0AP00...)
Manual, 12/2016, A5E03727049-AG
BaseUnits for I/O modules
3.13 BU20-P12+A0+0B (BU type D0)
61