sauter flexotron 400 Series User manual

SAUTER flexotron®400 -
RDT405
Manual
P100012100

SAUTER flexotron®400 - RDT405
Table of contents
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2
DISCLAIMER
The information in this manual has been carefully checked and is believed to be correct. Fr. Sauter AG
however, makes no warranties as regards the contents of this manual and users are requested to report
errors, discrepancies or ambiguities to Fr. Sauter AG, so that corrections may be made in future editions.
The information in this document is subject to change without prior notification.
The software described in this document is supplied under license and may be used or copied only in
accordance with the terms of the license. No part of this document may be reproduced or transmitted in
any form, in any fashion, electronically or mechanically, without the express, written permission of Sauter.
TRADEMARKS
flexotron® is a registered trademark of Fr. Sauter AG.
Some product names mentioned in this document are used for identification purposes only and may be
the registered trademarks of their respective companies.

SAUTER flexotron®400 - RDT405
Table of contents
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Table of contents
Table of contents.........................................................................................................................................3
1About this manual................................................................................................................................4
2Introduction to flexotron®400.............................................................................................................5
2.1 flexotron®400 controllers...........................................................................................................5
3Technical data ......................................................................................................................................7
4Installation and wiring .........................................................................................................................9
4.1 Installation..................................................................................................................................9
4.2 Wiring.........................................................................................................................................9
5Control modes....................................................................................................................................11
5.1 Control mode 1, Temperature control......................................................................................12
5.2 Control mode 2, CO2control....................................................................................................14
5.3 Control mode 3, General control 0…100% ..............................................................................15
5.4 Control mode 4, Pressure control ............................................................................................16
5.5 Control mode 5, Pressure control with outdoor temperature compensation of the pressure
setpoint.................................................................................................................................................17
6Display and encoder ..........................................................................................................................18
6.1 The Basic level.........................................................................................................................18
7Setpoint...............................................................................................................................................20
8Configuration......................................................................................................................................21
8.1 Menus 1.0 –5.0 .......................................................................................................................21
Index ...........................................................................................................................................................26

SAUTER flexotron®400 - RDT405
About this manual
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1 About this manual
This manual describes the controller flexotron®400 - RDT405.
More information
More information on RDT405 can be found in:
flexotron®RDT405 controllers Sales brochure
RDT405 Installation instructions and abridged manual
RDT405 product sheet
The information can be downloaded from the Fr. Sauter AG website,
http://www.sauter-controls.com/en.

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Introduction to flexotron®400
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2 Introduction to flexotron®400
2.1 flexotron®400 controllers
The controllers flexotron®400 is a range of pre-programmed, configurable
controllers that can be set to handle everything from temperature to CO2control
or pressure control. Features also include a general control usable for several
different control modes, such as humidity control or other applications. The
controller is intended to be used in residential, commercial and light-industrial
locations.
RDT405 and RDT410
The flexotron®400 series comprises two different types, RDT405 and RDT410.
The RDT405 has 5 inputs/outputs and can be configured to control Temperature,
CO2, Humidity or Pressure. There is a analogue input for connection of an
external N i1000 setpoint device for control mode 1 (Temperature control).
The RDT410 has 10 inputs/outputs and can be configured to control
Temperature (ventilation control with heating and cooling), Waterheated radiator-
heating with outdoor temperature dependent control-curve or Domestic hot water
control. There is a analogue input for connection of an external Ni1000 setpoint
device for control modes 1…4. The RDT410 also has a week-based scheduler.
The RDT410 is available in two versions, RDT410F201 with 24 V AC supply
voltage and RDT410F301 with 230 V AC supply voltage. For more information,
please refer to the separate RDT410 manual.
Mounting
The controllers flexotron®400 are designed primarily for DIN-rail mounting but
can also be screw-mounted to any suitable surface. The controller is intended for
stationary indoor use.
flexotron®400 –RDT405
The RDT405 is a pre-programmed, configurable controller.
All configuration and normal handling is done using the display and the knob on
the front.

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Introduction to flexotron®400
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In- and Outputs
The RDT405 has:
1 analogue input, Ni1000
1 analogue input for an external setpoint device, Ni1000
1 universal input, 0…10 V DC or digital
1 digital input
2 analogue outputs, 0…10 V DC
Control modes
The RDT405 is pre-programmed with a choice of 5 different control modes:
Temperature control
CO2control
General control
Pressure control
Pressure control with outdoor-temperature dependent compensation

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Technical data
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3 Technical data
Supply voltage............................................................... 24 V AC ±15%, 50...60 Hz
Power consumption..........................................................................................4 VA
Ambient temperature...................................................................................0...50°C
Ambient humidity................................................................................ Max 95% RH
Storage temperature................................................................................–20...70°C
Terminals........Disconnectable, so-called lift type for cable cross-section 1.5 mm2
Protection class .............................................................................IP20, when fitted
Material casing .................................................Polycarbonate plus ABS, PC+ABS
Colour
Cover..............................................................................................................yellow
Bottom part...................................................................................................... black
Weight...................................................................................... 215 g incl. terminals
Dimensions.........................................122 x 121 x 64 mm (WxHxD incl. terminals)
LVD, Low Voltage Directive
This product conforms with the requirements of European LVD standard IEC EN
61010-1.
EMC emissions an immunity standard
This product conforms with the requirements of European EMC standards
CENELEC EN 61000-6-1 and EN 61000-6-3 and carries the CE mark
Inputs
AI ...........................................................................................Resolution: 10 bit A/D
AI1 ...Ni1000-sensor, range -20…+140°C, divided into three measuring ranges,
accuracy +/- 0.2°C
SPI..........................................................Ni1000 setpoint device, range 0…40°C
............................Reference for AI and for UI when used as an analogue input
UI
AI .................................................0...10 V DC, accuracy +/- 0.15 % of full output
or DI........................................................................Closing potential-free contact
UI+................................................... Reference for UI when used as a digital input
DI...............................................................................Closing potential-free contact
DI+.................................................................................................Reference for DI
Output
AO1 0…10 V DC; 8 bit D/A short-circuit protected
AO2 0…10 V DC; 8 bit D/A short-circuit protected
Signal neutral for analogue outputs
Other data
Display.................................................Numeric / graphic. Background illumination

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Technical data
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Settings
Range
Factory setting
Setpoint
CO2
General (GEN)
Pressure (Pa)
Temperature ranges
0...100% of max set
value on UI1
0...100% of max set
value on UI1
0...100% of max set
value on UI1
-20…+60°C
20…100°C
60…140°C
1000 ppm
20% RH
2500 Pa
21°C
55°C
95°C
10 V DC in on UI1
CO2
General
Pressure
0...9900 ppm
1...100%
100 Pa...2500 kPa
2000 ppm
100% RH
5000 Pa
Neutral zone
12.5% of max
1°C (control mode 1)
5% (control mode 3)
P-band
CO2
General (GEN)
Pressure (Pa)
0...100% of UI1
0...100% of UI1
0...300% of UI1
5% of UI1
5% of UI1
5% of UI1
I-time
0…990 s
10 s
Outdoor compensation start
-20…+60°C
0°C
Pressure at -20°C outdoor
temperature
0 Pa...2500 kPa
1000 Pa
Accessories
External temperature sensors ...............................For example: EGT330, EGT346
Setpoint device...................................................................................EGT338F102
CO2-sensor .................................................................................................EGQ212
Humidity sensor (can be used for general control (3))...............................HSC120
Pressure sensor ...............................................................................................DSU
The accessories are available from Fr. Sauter. For more detailed information,
see product sheets and instructions which are available at http://www.sauter-
controls.com/de.

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Installation and wiring
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4 Installation and wiring
4.1 Installation The controller flexotron®400 must be mounted in a DIN-standard casing
(minimum 7 modules) or in a cabinet, either on a DIN-rail or, using the two screw-
pockets provided, by being screwed to any suitable flat surface in the cabinet.
The controller can also be mounted in a cabinet door or other control panel,
using a suitable front-mounting kit.
Ambient temperature: 0…50°C.
Ambient humidity: max. 95 %RH, non-condensing.
4.2 Wiring This section only describes general rules and technical limitations concerning the
wiring.
In chapter 5 there are specific wiring diagrams for the different control modes.
Choose the one suitable for the application on hand.
It is important to make sure that the wiring is correctly done, in accordance with
the instructions given in this manual and in accordance with local legislation for
this type of installation.
Terminal
Designation
Operation
-
LS
Supply voltage 24V~
-
MM
-
2
DI+
Reference for DI1
3
DI1
Digital input
4
UI+
Reference for UI1 digital mode
5
UI1
0…10V= or digital input
6
Ref. for AI1 and UI1 analogue
7
AI1
Ni1000 temp. sensor input
10
SPI
Input Ni1000 setpoint device
11
AO2
0…10V= Output
12
AO1
0…10V= Output
13
Ref. for AO1 and AO2
4.2.1 Supply voltage
24 V ~ ±15%, 50…60 Hz. 3 VA
If the RDT405 and active sensors and actuators connected to it share
transformer, it is essential that the same transformer-pole is used as reference
for all the equipment. Failure to do so will prevent the equipment from
functioning as intended and may also lead to damages.
4.2.2 Inputs and outputs
All ground terminals are interconnected and also connected to MM.

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Installation and wiring
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Analogue input AI
The analogue inputs must refer to an ground terminal. AI1 is for Ni1000
temperature sensors only. Temperature range: -20…+140°C. SPI is only
intended for a Ni1000 setpoint device, the range is 0...40°C.
For temperatures below -9.5°C, decimals will not be displayed. It is therefore
important to differentiate between, for example, -1.5 (minus one point five) and
-15 (minus fifteen).
Digital input DI
The digital input must refer to DI+ on terminal 2.
The digital input may only be wired to voltage-free contacts. Any external voltage
applied to a digital input may seriously damage the unit.
Universal input UI
The universal input can, depending on the choice of application, be made to act
as either an analogue input or as a digital input.
When used as an analogue input it is for 0...10 V DC input signals.
When the Universal input is used as an analogue input it must refer to the -
terminal or directly to earth.
When used as a digital input it must refer to UI+ on terminal 4. It may then only
be wired to voltage-free contacts.
Analogue outputs
Analogue outputs must refer to a - terminal or directly to MM.
If the RDT405 and active sensors and actuators connected to it share
transformer, it is essential that the same transformer-pole is used as reference
for all the equipment. Failure to do so will prevent the equipment from
functioning as intended and may also lead to damages.

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Control modes
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5 Control modes
flexotron®400 can be configured to any one of the following control modes.
1. Temperature control.
The temperature at the sensor is kept at the setpoint value by controlling the
output signals on AO1 and AO2. A single PI control loop is used.
Three different temperature ranges can be selected:
-20…+60, 20…100, 60…140°C
2. CO2control.
The CO2-value at the sensor is kept at the setpoint value by controlling the output
signal on AO1. A single PI control loop is used.
3. General control.
The actual value at the sensor is kept at the setpoint value by controlling the
output signal on AO1 and AO2. AO1 is used for positive, direct-acting control,
AO2 for negative, reverse-acting control. A single PI control loop is used.
4. Pressure control.
The pressure at the sensor is kept at the setpoint value by controlling the output
signal on AO1. The AO1 inverted signal is received from AO2. A single PI control
loop is used.
5. Pressure control with outdoor compensation.
The pressure at the sensor is kept at the setpoint value by controlling the output
signal on AO1. The AO1 inverted signal is received from AO2. The setpoint is
automatically adjusted according to the outdoor temperature. A single PI control
loop is used.

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Control modes
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5.1 Control mode 1, Temperature control
The analogue outputs can be configured to the following combinations:
AO1 / AO2
1. Heating / -
2. Cooling / -
3. Heating / Cooling
4. Heating / Heating
5. Cooling / Cooling
6. Heating / Damper
7. Cooling / Damper
8. Change-over / (Seasonal change-over between heating and cooling)
When an external setpoint device is used, the setpoint is received via the SPI
input, which has a resolution of 0…40°C.
In alternative 4, Heating-Heating AO2 will be activated first on increasing heat
demand.
In alternative 5, Cooling-Cooling AO2 will be activated first on increasing cooling
cemand.
In alternative 6, Heating-Damper, at temperatures above the setpoint the damper
on AO2 will be fully open. On increasing heating demand, the damper on AO2
will first close to the set minimum value before the heating output on AO1 starts
to increase.
In alternative 7, Cooling-Damper, at temperatures below the setpoint the damper
on AO2 will be fully open. On increasing cooling demand, the damper on AO2
will first close to the set minimum value before the cooling output on AO1 starts
to increase.
Temperature control is available for three selectable temperature ranges:
Low range (1): -20…+60°C
(Default SP= 21°C, minSP= -18°C, maxSP= +60°C)
Mid range (2): 20°C…100°C
(Default SP= 55°C, minSP= 22°C, maxSP= 100°C)
High range (3): 60…140°C
(Default SP= 95°C, minSP= 62°C, maxSP= 140°C)
DI1, Start signal
Normal control will only be activated when this input is activated, closed. Active
signal is indicated by a fan-symbol in the display. When the start signal is
deactivated the controller will set the outputs to 0.
This input must always be wired since it controls the starting and stopping of
normal control.
Universal input UI1, outdoor
The change-over function will make a seasonal change of the function of the
output signal on AO1. In summer the output will work as a cooling output and in
winter as a heating output. This is used in applications (fan-coil units) where the
same piping is used to transport hot water in the winter and chilled water in the
summer.
The universal input UI1 is used for the change-over function in alternative 8. Wire
the input as a digital input using either a manual switch or a thermostat

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Control modes
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monitoring the supply water temperature to open/close the input. Open contact
will give heating control and closed contact cooling control.
Damper
In applications with dampers it is often desirable to be able to set a minimum
amount of fresh air. In the output alternatives 6 and 7 it is possible to set a
minimum limit value to the damper output signal. The damper output will then not
go lower than the set value during normal operation. When DI1=0, however, the
signal will go to zero.
In the output mode heating –damper the damper will be fully open for
temperatures higher than the setpoint. On increasing heat demand the damper
will first close to the minimum value before the heating output starts to increase.
In the output mode cooling –damper the damper will be fully open for
temperatures lower than the setpoint. On increasing cooling demand the damper
will first close to the minimum value before the cooling output starts to increase.
External setpoint
It is possible to use an external Ni1000 setpoint device. The setpoint device is
connected between terminal 10 SPI and the reference for the analogue inputs,
. For more information on configuration and setpoint reading, see chapters 7
and 8.
Wiring example: Heating / cooling with change-over function

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Control modes
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5.2 Control mode 2, CO2control
The output signal will increase when the CO2-value rises above the setpoint
value.
The CO2-sensor must have a 0...10 V DC output for example:
EGT Room sensors
EGQ Duct sensor
The transmitter range cannot exceed 9900 ppm at 10 V DC output.
The output can be min./max. limited. The minimum value can be set between
0…99%, and the maximum value between 1…100%. If the min./max. parameters
are accidentally set to overlap one another, the max. function will be disabled
and the output will alternate between the min. value and 100%.
DI1, Start signal
Normal control will only be activated when this input is activated, closed. When
the start signal is deactivated the controller will set the output to 0.
This input must always be wired since it controls the starting and stopping of
normal control.
Wiring example: CO2-control using damper or frequency converter

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Control modes
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5.3 Control mode 3, General control 0…100%
Humidity control has been selected as an example:
The control mode consists of a general control in sequence. A neutral zone can
be set between AO1 and AO2.
The sensor must have an output signal of 0...10 V DC.
This control mode can be used for humidity control. If so, the following sensors
are recommended:
EGH Room humidity transmitters
EGH Duct transmitters
DI1, Start signal
Normal control will only be activated when this input is activated, closed. When
the start signal is deactivated the controller will set the outputs to 0.
Maximum Limiting, RH Max
When running humidification with the main sensor in the room it is sometimes
desirable to have some sort of maximum limiting on the humidity in the supply
duct.
To create such a limiting function, place an on/off humidistat such as HSC in the
supply air duct and wire it into the start signal circuit on DI1. The humidistat
should be normally closed.
Opening of the contact when the humidity rises above the set maximum value
will force the humidity output to 0.
Wiring example: Combined humidification / dehumidification

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Control modes
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5.4 Control mode 4, Pressure control
The output signal will increase when the pressure signal falls below the setpoint
value.
The pressure transmitter must have an output signal of 0...10 V DC, for example:
DSU.
Pressure ranges of up to 2500 kPa kan be set.
The AO1 inverted signal is received from AO2.
DI1, Start signal
Normal control will only be activated when this input is activated, closed. When
the start signal is deactivated the controller will set the output to 0.
This input must always be wired since it controls the starting and stopping of
normal control.
Wiring example. Pressure control

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Control modes
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5.5 Control mode 5, Pressure control with outdoor temperature
compensation of the pressure setpoint.
The output signal will increase when the pressure signal falls below the setpoint
value.
The AO1 inverted signal is received from AO2.
The setpoint value follows a settable pressure-to-outdoor temperature relation.
The pressure transmitter must have an output signal of 0...10 V DC, for example:
DSU
Pressure ranges of up to 2500 kPa kan be set.
The temperature range for outdoor temperature will be set to the low range for
this control mode, -20…+60°C.
DI1, Start signal
Normal control will only be activated when this input is activated, closed. When
the start signal is deactivated the controller will set the output to 0.
This input must always be wired since it controls the starting and stopping of
normal control.
Wiring example: Outdoor temperature compensated pressure control

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Display and encoder
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6 Display and encoder
All setting and configuration is done using the display and encoder.
The menu information on the display is organised in a tree fashion. Using the
encoder you can move between menus, set values etc.
In any of the configuration menus, a click on the encoder will activate change
mode. You can then rotate the encoder button to move between choices or set
values. A second click of the button will accept the choice.
The menu system is divided into two levels: The Basic level and the 10-second
level which contains all the configuration menus.
6.1 The Basic level
The Basic level comprises three sets of menu displays, the Base Display, the I/O
Displays and the Setpoint Display.
Base Display
This is an example of the Base Display, the display that is normally shown when
there is no operator activity.
The upper line shows which control mode has been configured, in this case
control mode 1, Temperature control. The bottom line shows the actual value of
the main input parameter.
There are bar-graphs showing the current output levels. In control mode 1 there
are symbols showing how the outputs have been configured (Heating, Cooling,
Damper or Change-over).
I/O
When the Base Display is shown, by twisting the knob counter clockwise until the
text I/O is displayed and then clicking on it, you can gain access to a menu where
you can look at the values and states of all inputs and outputs.
To exit this menu again, click on the knob and then twist the knob clockwise and
you will be returned to the Base display.
Setpoint
When in the Base Display, a click on the encoder button gives direct access to
the Setpoint menu.
See chapter 7 Setpoint.

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Display and encoder
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Calculated setpoint
In control mode 4, Pressure control with outdoor compensation, the controller
does not work towards a fixed setpoint value. Instead, it works towards a
calculated setpoint, which varies with the outdoor temperature. The calculated
setpoint is displayed by turning the knob clockwise when in the Base Display.
6.1.1 The 10-second level
This level is reached from the Base Display by pressing and holding the encoder
button for 10 seconds. The 10-second level holds all the configuration menus.
See chapter 8 Configuration.
The controller must display the Base Display when pressing the encoder knob
to reach the 10-second level.
6.1.2 Display symbols

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Setpoint
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7 Setpoint The setpoint menu is normally accessed from the Base Display by a clicking on
the encoder knob.
If you wish to change the displayed value, click on the knob again and the
change indicator ( ) will start to flash to show that you are now in change mode.
Twist the knob clockwise to increase the value, or counter-clockwise to decrease.
In applications with active input signals (control modes 2, 3, 4 and 5) the setpoint
cannot be set higher than the value corresponding to 10 V DC input signal.
When the desired value is shown, click on the knob to acknowledge. To return to
the Base display, twist the knob.
For configurations involving a single output signal the setpoint is the starting point
for the output signal.
For configurations involving two diverging output signals with neutral zone
(heating –cooling or general control in sequence) the setpoint is placed in the
middle of the neutral zone.
For configurations involving two outputs without neutral zone (heating –heating,
cooling –cooling, heating –damper or cooling –damper) the setpoint value is
the starting point for the first sequence (Y2)
External setpoint (SPI)
When using an external setpoint device, the setpoint can be read by clicking on
the knob while in the base display. If you click on the knob again, a symbol will
start to blink, indicating that an external setpoint device is being used and that
the setpoint cannot be changed via the display. External setpoint can be used for
control mode 1. The SPI input can also be read via the I/O menu. The
temperature range for an external setpoint device is 0…40°C.