Ac 24 V Power Lines; Pxc3 (Power And Island Bus Lines) - Siemens Desigo TRA Engineering, Mounting And Installation Manual

Installation example
L
N
AC 230 V
AC 24 V
24V~
F1
...A
N1
Key
26 / 84
Siemens
Building Technologies
6.3

AC 24 V power lines

6.3.1

PXC3 (power and island bus lines)

The following diagram illustrates basic wiring for power lines for modular room
automation stations using AC 24 V operating voltage as per PELV (Grounding of
near the transformer). SELV without grounding is also admitted.
Installation box 1
T1
K
F3
F4
U1
X1
F5
T, T2 Safety transformer AC 230 V / AC 24 V as per EN 61 558.
K Terminal block for star distribution of AC 24 V and .
N1 PXC3 room automation station.
N2 PXC3 room automation station, with separate power AC 24 V
(looped power from T1 admitted but not recommended).
U1 Power supply module TXS1.12F10
X1 Bus connection module TXS1.EF10
F1, F2 Low-voltage fuse, for max. power with AC 24 V. Max. T 10 A
F3 T 10 A fuse in the PXC3
F4 T 10 A fuse in power supply module.
F5 T 10 A fuse in the bus connection module.
Desigo TRA Engineering, mounting and installation
Wiring of power lines
Installation box 2
L
AC 230 V
AC 24 V
24V~
F2
...A
N2
X1
F4
N
T2
CM111043en_09
2016-02-22
AC 24 V
Island bus