User Manual

8.3.4 Binary step switch
Use the binary step switch to switch multistage aggregates. Size the aggregates
according to the binary load distribution.
 With the binary step switch, run priority changeover is not possible.
Note
s

Connect a modulating load signal to the output at aggregate A (
A).
In the binary step switch, digital outputs and number of load steps are assigned as
per the tables below to the entire switching capacity of the aggregate.
Load a
ssignment
– If configured without modulating output:
Load assignment
Configured
outputs
Cmd
A Cmd B Cmd C Cmd D
Number of
load steps
0 +2 A = 1/3 B = 2/3 3
0 +3 A = 1/7 B = 2/7 C = 4/7 7
0 +4 A = 1/15 B = 2/15 C = 4/15 D = 8/15 15
– If configured with a modulating output:
Load assignment
Configured
outputs
Load
A Cmd B Cmd C Cmd D
Number of
load steps
1 +2 A = 1/4 B = 1/4 C = 2/4 4
1 +3 A = 1/8 B = 1/8 C = 2/8 D = 4/8 8
0
= No modulating output.
Key
1
= 1 modulating output.
Load assignment applies the following pattern:
Load a
ssignment
0 % 100 %
+
+
100 %0 %
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Aggregates 01.04.2010