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Siemens
Installation guide RXB, RXL
CM110381en_01
Building Technologies
Periphery wiring (without bus)
28 Feb 2009
3.1.7
Connect room units in master/slave configurations
The room controllers or room units can be configured as master or slave. A number
of rules must be adhered to in this process.
If more than one room unit is used in a master/slave configuration, only room units
may be used with a button for setpoint shift. In the case of room units with a
mechanical setpoint shift, only one room unit may be connected (combining room
units with mechanical setpoint shift and room units with buttons for setpoint shift is
not allowed).
Applies as well for RXB10 room controllers in room unit housings.
•
Room unit with button
setpoint shift (several
room units allowed).
RXB... / RXL...
103
81Z2
3
QAX34.1
Master
Slave
BUS
QAX34.1
RXB... / RXL...
•
Room unit with
mechanical setpoint
shift (only one room unit
allowed).
QAX31.1,
QAX33.1
RXB... / RXL...
Master
Slave
BUS
103
81Z2
4
-
+
Auto
RXB... / RXL...
If the room unit is connected to the building automation and control system via
room controller and is controlled via the bus with
Setpoint shift heating/cooling
, a
room unit with mechanical setpoint shift CANNOT be used.
•
Use of more than one
room unit with a
mechanical setpoint
shift.
RXB... / RXL...
-
+
Auto
QAX33.1
Master
Slave
BUS
-
+
Auto
QAX33.1
10
38
1Z2
5
RXB... / RXL...
•
Combination of room
units with mechanical
setpoint shift and room
units with buttons for
setpoint shift.
RXB... / RXL...
RXB... / RXL...
-
+
Auto
QAX33.1
Master
Slave
KNX / EIB
QAX34.1
10
38
1Z
26
Permissible
combinations
STOP
Caution!
Prohibited
combinations