User Manual

Wiring
Power supply AC 230 V
11
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11.1 Power supply AC 230 V
Basic implementation for web server
The diagram below illustrates basic wiring for power lines for web server using AC 24 V operating voltage per
PELV:
They are wired in a star as view from the connection terminals (24 V ~ , ⊥ ).
N Web server
T Safety transformer AC 230 V / AC 24 V as per EN 61 558.
F1 Low-voltage fuse, for max. power with AC 24 V.
24 V System potential AC/DC 24 V
⊥ System zero
The connections of the functional earth must be connected on the installation side to the building grounding system (PE).
24 V distributor to PXG... keep wiring as short as possible. 24 V distributor is the start point.
Lines
Line materials
Use the following material for 24 V wiring and ⊥ for the supply voltage AC 24 V:
● Stranded wire with a cross-section of 1 mm2, 1.5 mm2, or 2.5 mm2
● Individual or a 2-wire cable.
For information on wire lengths and cross sections, see Section Power requirements [➙ 28].
Transformer phase position
The transformer phase position to one another is not relevant, in other words, the transformers can be powered
using the different phases ( L1, L2, L3 ).
11.2 Power supply DC 24 V
The same rules apply as for AC 24 V.