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Siemens TX-I/O Engineering and installation guide CM110562en_13
Building Technologies Wiring 2019-05-15
6.5.2 Example: 1 transformer, 1 or 2 control panels
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T
K
K
6.5.3 Example: 2 transformers, 1 or 2 control panels
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K
T
K
• System neutral of the two transformers must be connected as close as possible to
the transformers.
6.5.4 Example: New power supply (module supply or AC 24 V)
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T1
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• A new provision is required in the following cases (for details refer to Section 10.3):
– When the admissible supply current of 1.2 A in the module supply is "used up"
by the I/O modules and the field devices: a new power supply module is required
(operating in parallel with the first one).
– When the admissible supply current of 6 A in the field supply is "used up" by the
field devices: a new power supply module or bus connection module is required.
– New circuit with separate fuse.
• The CS and CD conductors of the power supply modules and bus connection
modules are connected internally, so that these are available to the whole I/O row.
• The field supply (AC 24 V
) has no bus connector on the left side, so that only the
I/O modules to the right are supplied.
Note
Notes