Siemens SIMATIC ET 200SP Manual page 31

Pin assignment of the BaseUnit BU type B0
To connect to or use an existing potential group, you must use the following BaseUnit.
A new potential group is not created with the BaseUnit BU type B0 (BU20-P12+A4+0B /
6ES7193-6BP20-0BB0). It continues the potential group. The self-establishing voltage
busbars P1, P2 and the AUX rail are looped through to the neighboring module (BaseUnit)
on the left.
All 24 V nominal power supplies of the I/O circuits must only be powered by approved
sources that fulfill the requirements according to EN61010-2-201 for SELV, PELV, Class 2,
voltage limited and/or power limited sources.
Note
The ground of the voltage supply must be connected to the potential group with PE.
Designation
DQ for TRIP line
DQ for PP
Control Pilot
Plug Present signal
Not used
Not used
Technology module TM ECC PL ST (6FE1242-6TM20-0BB1)
Manual, 07/2019, A5E43919893B-AA
I/O name View
DQ T 1
DQ P 3
CP 5
PP 7
- 9
- 11
AUX 13
15
3.1 Terminal assignment and power supply
I/O name Designation
2 - Not used
4 - Not used
6 - Not used
8 - Reserved
10 - Not used
12 - Not used
14 AUX
16
Wiring
29