Table of Contents
Advertisement
Key
Notes
Siemens
Building Technologies
7.4
Island bus wiring
• 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 mounting and installation guide TX-I/O engineering and installation guide
10562 [2] 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.
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
interface 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.
N1
PXC3 room automation station.
X1, X2
TXS1.EF10Bus interface modules
U2, U3
TXS1.12F10Power 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
Mounting and installation
Wiring for AC 24 V and island bus
Island bus
Island bus-Extension
AC 24 V
27 / 56
CM111043en_03
2013-02-23
Advertisement
Table of Contents
