User Manual

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Siemens TX-I/O Engineering and installation guide CM110562en_13

Building Technologies Wiring 2019-05-15

6.5 Wiring examples

6.5.1 Principles

AC 24 V is always connected in a "star" configuration (from terminal block K)

For longer distances (typically between two control panels), the cables for bus and

AC 24 V / ⊥ MUST be tied together.

For shorter distances, also inside the control panel, we recommend this as well.

Admissible cable lengths see Sections 10.4 and 10.5.

10762z058

Transformer

Terminal block for the distribution of AC 24 V

Bus cable for CS and CD

Cable for AC 24 V and system neutral ⊥

Cable V

for field supply and system neutral ⊥

Cable for system neutral ⊥

Tie cables together *)

Automation station + power supply module

P-BusBus interface module with built-in power supply

PROFINET BIM plus power supply module

Supply module (TXS1.12F10)

Bus connection module (TXS1.EF10)

Row of I/O modules with island bus

*) Tie cables together to avoid loops (inductive disturbances),

BUT do not route the ⊥ conductor in the same cable (capacitive disturbances).

The connections between the terminals and bus cables are as follows:

TXS1.12F10 power supply module TXS1.EF10 bus connection module

24V~

3 4 5 6

CS CD

1 2

24V~

CS CD

10562A012

10A

3 4 5 6

CS CD

1 2

CS CD

10562A013

10A

Note

Key

Internal circuit