Siemens et 200sp - Page 20

Connecting
3.1 Terminal assignment and schematic circuit diagram
Technology Module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 05/2019, A5E35061186-AB
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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
Terminal name
View
Terminal name
Description
24 V DC sensor supply
24VDC
1
2
24VDC
24 V DC sensor supply
Channel 0
Digital input DI0
DI0.0 3 4 DI1.0 Channel 1
Digital input
Channel 0
Ground for digital inputs
M 5 6 M Channel 1
Ground for digital inputs
Channel 0
Ground for digital outputs
M 7 8 M Channel 1
Ground for digital inputs
Channel 0
Digital output DQA
DQ0.A 9 10 DQ1.A Channel 1
Digital output DQA
Channel 0
Digital output DQB
DQ0.B 11 12 DQ1.B Channel 1
Digital output DQB
24 V DC supply voltage L+ 13
(1L)
14
(1N)
M Ground for supply voltage
L+ 15
(2L)
16
(2N)
M
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.