User Manual

Functions
Control outputs
4
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● The demand calculated by PI control from the current room temperature and
setpoint is provided via Y20 as a continuous DC 0...10 V signal
● The signal converter (SEM61.4) converts the DC 0...10 V signal to AC 24 V
PDM pulses for the current valve
● The current valve (SEA45.1) supplies the electric heater with pulsed current
The electric heater can be controlled via the On/Off control output (Q2) by setting
P203 or P204 to 4. For adaptive temperature compensation, see 2-pipe fan coil
unit with electric heater [➙ 58].
N1 RDG260KN
C1 Signal converter
SEM61.4
(see Data Sheet N5102)
Y1 Current valve SEA45.1
(see Data Sheet N4937)
K… Safety loop (e.g. safety
thermostat and
high-temperature
cutout)
FF Very fast-acting fuse
F… Overcurrent trip
The RDG260KN can control a 6-port control ball valve that provides heating and
cooling within one DC 0…10 V or DC 2…10 V signal.
With those 2 signals, it is possible to control Siemens valves as well as other
manufacturer DC 2…10 V valves.
The RDG260KN can also provide for the same application, an inverse signal
DC 10…0 V or DC 10…2 V signal in case of inversed hydraulic connection on the
valve.
The selection of the signal can be set with P201.
Description Explanations
P201 = 6
6-port valve (DC 0…10 V
control signal)
Suitable for Siemens and competitors’
6-port control valve and actuators with
DC 0…10 V signal
P201 = 7
6-port valve (DC 2…10 V
control signal)
Suitable for competitors’ 6-port control
valve and actuators with DC 2…10 V
signal (for example Belimo)
P201 = 8
inverse signal, 6-port valve
(DC 10…0 V control signal)
Useful in case of inversed hydraulic
connection on the 6-port control ball
valve with Siemens or competitors’
DC 0…10 V actuator*
P201 = 9
inverse signal, 6-port valve
(DC 10…2 V control signal)
Useful in case of inversed hydraulic
connection on the 6-port control ball
valve with competitors’ DC 2…10 V
actuator (for example Belimo)*
* Inversing the signal might cause hydraulic balancing issues
DC 0...10 V
for electric heaters
Note
DC 0...10 V
DC 2…10 V
for 6-
port control ball valve
(RDG260KN only)