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Siemens
Desigo TRA Engineering, mounting and installation
CM111043en_09
Building Technologies
Island bus
2016-02-22
11 Island
bus
This chapter is only a brief overview of the island bus installation.
The TX-I/O engineering and installation guide 10562 [7] includes detailed
information on island bus wiring and island bus extension for PXC3 room
automation stations and TX-I/O modules.
Island bus and island bus expansion are designed for indoor use in one building
only.
PXC3 room automation stations each have switchable TX-I/O DC 24 V / 600 mA
module power supply. They are switched on at the factory.
The following diagram displays basic wiring variants of the island bus together with
the room automation station:
– TX-I/O modules on the
same standard rail as the PXC3
.
– TX-I/O modules on a different standard rail, connected via an additional
bus
connection modules X1, X2
.
– TX-I/O modules on a different standard rail, connected via an additional
power
supply module U2
.
– TX-I/O modules in an offset installation box; connected via
island bus
extension modules U4, U5
.
Island bus
Island bus-Extension
AC 24 V
N1
PXC3 room automation station.
X1, X2 TXS1.EF10 Bus connection modules
U2, U3 TXS1.12F1 0Power supply modules
U4, U5 TXB1.IBE Island bus extension modules
The
bus connection module
(X1) must be placed at the end of the TX-I/O row.
Modules to the right side of the bus connection module would otherwise have no
supply of AC 24 V.
The
island bus extension modules
(U4, U5) may be anyplace in their TX-I/O
row. For signal quality reasons, however, the best place is directly after the
power supplying device
Key
Notes
