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Siemens
Installation guide RXB, RXL
CM110381en_01
Building Technologies
Periphery wiring (without bus)
28 Feb 2009
– The subline length is limited to 3 meters for line topologies
(See section 4.5.2)
–
You cannot switch multiple lines in parallel to increase wiring diameter!
A
∅
max. simple line length
[mm
2
]
[mm]
[m]
1,00 1,15 125
0,75 0,98 115
0,50 0,80 75
Address
room devices is
not supported
in the room automation system DESIGO
RXB / RXL (in contrast to DESIGO PX).
Address 1 must, however, be set in the room units (factory setting).
3.1.6
Relay outputs
Fans are controlled using potential-free relay outputs. The following applied for the
wiring:
–
The maximum load of the relay contracts must be observed (see data sheets for
the corresponding controller)
–
The sizing and fusing of the power lines are oriented to overall connected load
and local regulations.
–
Fusing of switching circuits depends on the controller. The fused electrical
values must therefore be reviewed in the data sheets for the corresponding
controllers.
–
The lines must be fused on the controller with strain relief.
Controllers RXB22.1 and RXL22.1 also have a relay contract (Q44)
for switching
electrical heating coils. Observe the following:
•
The maximum power is 1.8 kW ohm load. Larger loads close the contact too
much.
•
A external fuse of max. 10 A is planned to protect room controller circuits.
