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Siemens RDF800KN.., RDF800KN/VB, RDD810KN/NF Basic documentation CE1P3174en
Smart Infrastructure 2020-02-21
· When the thermostat is powered up, a closing command for the actuator
running time + 150% is delivered to ensure that the actuator fully closes and
synchronizes to the control algorithm.
· When the thermostat calculates either the fully closed or fully open position,
the actuator's running time is extended + 150% to ensure the right actuator
position is synchronized to the control algorithm.
· After the actuator reaches the position calculated by the thermostat, a waiting
time of 30 seconds is applied to stabilize the outputs.
Outputs Q14 and Q12 deliver the Normal Open (NO) and Normal Closed (NC)
commands to the 2-position valve.
Both outputs are potential-free, depending on the Q11 input. Q11 can accept AC
24…230 V input voltage.
Output Q14 (NO) will be closed or output Q12 (NC) will be opened when the
acquired room temperature is below its setpoint.
Q11 and Q14, or Q11 and Q12 can be used as a relay contact for switching the
boiler on and off.
3.7.2 Control outputs configuration (using the DIP switches
or the tool) (RDF800KN.., RDF800KN/VB only)
In 2-pipe applications (2- or 3-position), the control outputs are set using the DIP
switches (see section 3.4).
The DIP switches have no impact if the application is set up via tools. In this case,
the control outputs need to be set with the ACS tool.
Synchronization
Heating output
control signal
(2-position)
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