Siemens ET 200SP Manual page 20

Terminal assignment of the BaseUnit
The table below shows the terminal assignment of the BaseUnit BU20-P12+A0+4B.
Table 3- 1 Terminal assignment of the BaseUnit BU20-P12+A0+4B
Description
24 V DC sensor supply
Channel 0
Digital input DI0
Channel 0
Ground for digital inputs
Channel 0
Ground for digital outputs
Channel 0
Digital output DQA
Channel 0
Digital output DQB
24 V DC supply voltage
Cable shielding
You must ground the shields of the cables between sensors and the technology module and
connect them to the DIN rail or the ground connection of the central power supply of the
plant.
Technology Module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 05/2019, A5E35061186-AB
Terminal name View
24VDC 1
DI0.0 3
M 5
M 7
DQ0.A 9
DQ0.B 11
L+ 13
(1L)
L+ 15
(2L)
3.1 Terminal assignment and schematic circuit diagram
Terminal name
2 24VDC
4 DI1.0
6 M
8 M
10 DQ1.A
12 DQ1.B
14 M
(1N)
16 M
(2N)
Connecting
Description
24 V DC sensor supply
Channel 1
Digital input
Channel 1
Ground for digital inputs
Channel 1
Ground for digital inputs
Channel 1
Digital output DQA
Channel 1
Digital output DQB
Ground for supply voltage
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