Siemens RDF800KN Series User Manual

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Siemens RDF800KN.., RDF800KN/VB, RDD810KN/NF Basic documentation CE1P3174en
Smart Infrastructure 2020-02-21
3.7 Control outputs
3.7.1 Overview
Different control output signals are available. They must be defined during
commissioning (see below).
Control output
Product
n
o.
2-position 2-position
PWM
3-position DC 0…10 V
RDF800KN..,
RDF800KN/VB
Y1, Y2
(2 x SPST)
---
Y1, Y2
*)
(1 x / )
---
RDD810KN/NF
Q11, Q12, Q14
(1 x SPDT)
--- --- ---
*)
Only applies to 2-pipe applications.
The valve or compressor receives the OPEN/ON command from control output Y1
or Y2 when…
· The acquired room temperature is below the setpoint (heating mode) or above
the setpoint (cooling mode).
· The control outputs have been inactive for more than the "Minimum output
OFF-time" (factory setting 1 minute, adjustable via P48).
The OFF command is received when…
1. The acquired room temperature is above the setpoint (heating mode) or below
the setpoint (cooling mode).
2. The valve has been active for more than the "Minimum output on-time" (factory
setting 1 minute, adjustable via P49).
The electric heater receives an ON command using the auxiliary heating control
output (Y.., see Mounting Instructions) when…
· The acquired room temperature is below the "setpoint for electric heater".
· The electric heater has been off for at least 1 minute.
The OFF command for the electric heater is output when…
· The acquired room temperature is above the setpoint (electric heater).
· The electric heater has been on for at least 1 minute.
A safety limit thermostat (to prevent overtemperatures) must be provided externally.
When an electric heater is connected directly to On/Off output Y2, the current
causes the relay contact to heat up. This falsifies the reading of the built-in
temperature sensor. The thermostat compensates the temperature if the rated
power of the electric heating is entered in the parameters.
P45 (power of electric heater): Factory setting 0 kW, setting range: 0.0…1.2 kW.
Output Y1 provides the OPEN command, and Y2 delivers the CLOSE command to
the 3-position actuator.
The factory setting for the actuator's running time is 150 seconds. It can be
adjusted via P44.
The parameter is only visible if 3-position is selected via the DIP switches.
Overview of control
outputs
On/Off control signal
(2-position)
Electric heater control
signal
(2-position)
Caution
Adaptive temperature
compensation for
electric heater
3-position
control signal

Siemens RDF800KN Series Specifications

General

Brand	Siemens
Model	RDF800KN Series
Category	Thermostat
Language	English