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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12 CM110385en_05
Building Technologies
General and central functions
28 Feb 2009
11.17.1 Digital inputs on the KNX bus
D1
D2
RXB... Room controller
Digital input 1
Digital input 2
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The following S-mode input and output communication objects are used when taking
advantage of spare inputs and outputs:
Digital input 1 (Output communication object)
Digital input 2 (Output communication object)
Flags
R W C T U
Type Send
heartbeat States
1 0 1 1 0
1.001
DPT_Switch
no
1
Parameter setting in the tool
Cause
Digital input
Effect:
Bus output
Not used: Bus = 1 = closed
closed
1
open
0
Not used: Bus = 1 = open
open
1
closed
0
11.17.2 KNX signals on digital/analog outputs
Y1
Q24
RXB... Room controller
Triac Y1
Relay Q24
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Triac Y1 (Input communication object)
Triac Y2 (Input communication object)
Triac Y3 (Input communication object)
Triac Y4 (Input communication object)
Relay Q24 (Input communication object)
Relay Q34 (Input communication object)
Flags
R W C T U
Type Receive
timeout
States
0 1 1 0 0
1.001
DPT_Switch
no
0 = Off (voltage-free)
1 = On (AC 24V)
KNX
R
CO