46.205/1
RDT 711: Controller for ventilation/air-conditioning with advanced functionality
How energy efficiency is improved
Free outside cooling with adjustable parameters. Inputs are provided for connecting room user panels
for modification of the setpoint or operating mode and for setpoint adjusters.
Areas of application
A number of relay outputs for the activation of a fan, pump or actuator.
Analogue outputs for the activation of final control elements for heating and cooling register, as well as
dampers for heat and cold recovery.
Features

2-line plain text display with backlighting

Easy operator guidance with 4 buttons

4 different basic models for continuous supply air and cascade control

Expansion level with PLC functionality

Weekly and annual switching program with automatic summertime/wintertime changeover

Manual mode

Option of connecting various setpoint adjusters

PC software for parameterisation
PI D
Y02 899
Technical description

Housing made of flame-retardant, black thermoplastic

4 analogue inputs Ni1000 or 0 - 10 V and 2 digital inputs

Multiplication of measured values

PID control

3 analogue outputs (0 - 10 V) and 2 relay outputs

Protected SERVice level with adjustable control parameters

Sequencing, limiting and reset functions

Free outside cooling

Frost protection function

Suitable for mounting on top-hat rail as per EN 60715

Electrical connection with screw terminals for wires up to 1.5 mm²
Type
RDT 711 F002
Supply voltage
24 V~
24 V=
Power consumption
Outputs
Digital outputs 1)
Analogue outputs
Inputs
Digital inputs
Analogue inputs
Input impedance
Parameters, main controller
Proportional band
Integral action time
Parameters, aux. controller
Proportional band
Integral action time
Derivative action time
Features
Power supply
Weight
kg
SA-temperature control
24 V~/=
0,30
 20%, 50…60 Hz
-10…+30%
approx. 5 VA
2 digital, 3 analogue
4 A, 230 V~, cos > 0.6
0…10 V dc, 5 mA
short-circuit protected
2 digital, 4 analogue
switching current approx. 5 mA
4 Ni1000, 0…10 V,
room control unit
or setpoint adjuster
approx. 15 k (for 0…10 V=)
0…100 K
0…999 s
0…100 K
0…999 s
0.0…99.9 s
Temperature ranges
Normal temperature
-50,0…300 °C
Reduced temperature
-50,0…300 °C
given/actual value, aux. ctrlr. -50,0…300 °C
Cycle time
1)
2)
1s
Digital time-switch for daily, weekly and
calendar switching programmes
Back-up capacity
min. 24 h
Accuracy
< 2,5 s/day @ 25°C
Daily switching prog.
Switching commands
6
Min. switching period
15 minutes
Weekly switching prog.
Switching commands
6 per day
Calendar switching prog.
Switching commands
12
min. switching period
1 day
Ambient temp.
Storage temp.
Ambient humidity
Type of protection
Protection class
EMC immunity
EMC irradiation
Safety
Documentation
Wiring diagram
Dimension drawing
Fitting instructions
Operating instructions
Manual
Declaration on materials
0…50°C
-20…60 °C
5…95% rh
non-condensating
IP20 2) (EN 60529)
II (IEC 60730 - 1)
EN 50082-2
EN 50081-1
EN 60730-1
A10485
M10475
P100001972
P100002033
7 010047
MD 46.201
Potential-free contacts
When fitted
Sauter Components
7146205003 04
46.205/2 RDT 711
Accessories
- STU101F001
- XPES F001
- EXG 100 F001
- EGT . . .
- AV . , AS .
0313991 001
Multiplier/Converter for measured temperature data, see Section 44
Setpoint-potentiometer, see Section 46
Active potentiometer, see Section 46
Temperature sensor, see Section 36
Electric drives, see Section 51
USB adaptor for access to the RDT 711 via PC
Engineering notes
The flexotron® 700 RDT 711 controller should be connected to the mains power supply at all times.
General description of operation
Depending on the control model used, the RDT 711 provides either constant control of the supply-air
temperature or supply-air/return-air cascade control. The temperature of the supply/room/return air
and, depending on the installation, the outside air, are measured using precision sensors. The microprocessor employed in the controller uses these temperatures to calculate the signals for the outputs.
Using the control models stored in the controller, the setpoints, the current control offset and the set
control parameters – along with the actual values – are taken into account when the output signals are
worked out. The calculated signals are further processed via switching amplifiers. The on/off commands for the relay outputs and the voltage for the analogue outputs result from these.
The necessary heat/cold is fed into the room and the room temperature is kept constant at the setpoint.
The switching programme, which can be set up by the user to meet his particular requirements, ensure a minimum of energy consumption while providing optimum room conditions. The setpoint and
the operating mode can be set on the controller itself or, if the relevant accessory is used, in the room
or remotely. An installation switch can be connected to the controller.
Date, time, setpoints, actual values and the switching programme can be easily viewed and (except
the actual values) adjusted on the illuminated display. Any malfunctions occurring in the installation
are shown on the display immediately.
Abbreviations
AB = return air
AU = fresh air
FAK = free outside cooling
FO = exhaust air
KRG = cooling recovery
Additional technical data
Measuring accuracy
Accuracy of analogue outputs
Back-up capacity
Input for temperature sensor
Adjustment of supply/return air and
room temperature
Adjustment of outside temp.
Binary inputs
TA = outside temperature
TR = room temperature
WRG = heat recovery
ZU = supply air
better than  1.0 K for NI1000 inputs
better than  0.5% of measuring range for 0…10 V
better than  0.5% of measuring range
The power failure reserve is at least 24 hours.
The controller must have been connected to the
power supply for at least 10 minutes beforehand.
Ni1000, 0…10 V
up to  15 K is possible
up to  15 K is possible
If the voltage between terminals 26/27 and 28 (GND) is
< 5 V, the contacts are interpreted as being closed. If it is
greater than 10 V, the contacts are interpreted as being
open The current across the contacts is approx. 5 mA; the
open-circuit voltage is approx. 24 V dc.
Mechanical switching frequency of relays > 5 million switching operations
Sauter Components
7146205003 04
RDT 711
Special functions
Sequence module
The controller contains sequences for heating/cooling and
heating/WRG/KRG/cooling. These can be parameterised,
depending on the application. The parameters can be set in
the application level.
Frost-protection function.
A binary input (terminal 27) is available for connecting a
frost-protection monitor. The frost-protection function cuts in
whenever the relevant signal is present at the binary input.
The frost-protection function cuts in regardless of the prevailing operating mode. It remains active even when the installation is switched off. When the frost-protection function
cuts in, the fans are switched off and the dampers are
closed. The heating valve is opened fully and the pump for
the heating coil is switched on.
Setpoint shift
The setpoint for the supply air or room temperature (or the
setpoint for the main controller if cascade control is in operation) can be shifted as a function of TA. Summer shift
and winter shift can both be parameterised. To do so, the
parameters for following should be set: the starting point of
TA for the shift, the influence of the shift on the setpoint and
the limit value for the setpoint. The parameters are set in the
application level.
Limitation of supply/return air and
room temperature
46.205/3
Depending on the application, the minimum and the maximum setpoint for the return-air temperature or TR and/or for
the supply-air temperature can be set. Furthermore, the
analogue output signals can be limited with regard to their
minimum and maximum values. The parameters can be set
in the application level.
Manual mode
The controller has a manual mode. Control is suspended on
accessing the manual mode. The various output signals are
kept at the values at which they were last set. The output
signals can each be activated individually in the manual
level. For the inputs, the value that is currently at the terminal is shown.
Free outside cooling (FAC)
FAK enables a room to be cooled using the cool outside air
during a particular period. It is possible to set the parameters for the conditions for TA, TR and the time period within
which FAK occurs. Control is suspended whenever FAK is
activated. The outputs are controlled in a set fashion. The
parameters can be set in the application level.
Multiplication of measured values
Within the flexotron® 700 range, measured values can be
multiplied. To do so, the sensor should be connected to the
controller's inputs that are wired in parallel to each other. If a
sensor with passive signal is used, both the type of sensor
and the multiplication have to be parameterised.
Energy recovery
If the system is in heating mode, return-air energy can be
utilised using a heat recovery facility (WRG) provided the
return-air temperature is higher than the outdoor temperature. If the system is in cooling mode, energy can be saved if the outdoor temperature is lower than the return-air
temperature.
Setting parameters via PC
The controller can be parameterised and configured using
the relevant adaptor and a PC with USB port.
Sauter Components
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46.205/4 RDT 711
Examples of use
M
Rel 4
M
Y1 S4
Rel 3
MOD 201: Constant supply-air (room-)temperature control with
control of the fan and the pump for the heating coil
M
Rel 4
Y1
S4
Y2
M
Rel 4
Y1 S4
M
Rel 3
Rel 3
MOD 201: Constant supply-air (room-)temperature control with
control of the fan and the ventilation dampers
M
MOD 202: Return (room) air/supply-air cascade control with
heating/cooling with control of the fan and the
pump for the heating coil
Y3
Rel 4
Rel 4
M
Y1 S4
Y2
Rel 3
MOD 202: Return (room) air/supply-air cascade control with
heating/cooling with control of the fan and the
ventilation dampers
M
Y1 S4
Y2
Rel 3
MOD 203: Return (room) air/supply-air cascade control with
recirculation, heating coil and cooling coil
Sauter Components
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RDT 711
M
Y3 Rel 4
M
Y1S4
Y2
46.205/5
M
Rel 3
MOD 204: Return (room) air/supply-air cascade control
(heating/cooling) with heat recovery and control
of the fan and the pump for the heating coil
Rel 4
Y3
Y1 S4
Rel 3
MOD 204: Return (room) air/supply-air cascade control
(heating/cooling) with heat recovery and
control of the fan for the ventilation dampers
Wiring diagram
11
XPES F001
0...10V
Ri=15k
Dimension drawing
Sauter Components
Printed in Switzerland
Right of amendment reserved
N.B.: A comma between cardinal
numbers denotes a decimal point
© Fr. Sauter AG, CH-4016 Basle
7146205003 04
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