Siemens RDG20 KN Series Operator's manual

RDG20..KN.. & RDG26..KN..,
RDG200T, RDG260T
Room thermostats,
communicating and standalone
Basic Documentation
A6V11545892_en--_e
Smart Infrastructure
2023-06-20

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Table of Contents
1 About this document.................................................................................5
1.1 Revision history...........................................................................................5
1.2 Reference documents..................................................................................6
1.3 Before you start...........................................................................................7
1.3.1 Trademarks ..................................................................................7
1.3.2 Copyright......................................................................................7
1.3.3 Quality assurance.........................................................................7
1.3.4 Document user/request to the reader............................................8
1.4 Target audience, prerequisites.....................................................................8
1.5 Glossary......................................................................................................8
2 Overview....................................................................................................9
2.1 Types..........................................................................................................9
2.2 Functions...................................................................................................10
2.3 Accessories...............................................................................................14
2.4 Equipment combinations............................................................................14
2.4.1 Recommended RDG actuators and 6-port valves combinations ..18
2.5 Integration via KNX bus.............................................................................19
3 Notes........................................................................................................21
3.1 Mounting and installation ...........................................................................21
3.2 Commissioning..........................................................................................22
3.3 Operation ..................................................................................................24
3.4 Remote operation......................................................................................26
3.5 Disposal ....................................................................................................27
3.6 Cyber security disclaimer...........................................................................27
4 Functions.................................................................................................28
4.1 Temperature control ..................................................................................28
4.2 Operating modes.......................................................................................29
4.2.1 Different ways to influence operating mode.................................30
4.2.2 Communication examples...........................................................36
4.3 Room temperature setpoints......................................................................38
4.3.1 Description..................................................................................38
4.3.2 Setting and adjusting setpoints....................................................40
4.4 Application overview..................................................................................43
4.4.1 Applications for fan coil systems..................................................44
4.4.2 Applications for universal systems...............................................45
4.4.3 Application for heat pump systems..............................................46
4.5 Power supply selection for RDG20..KN......................................................47
4.6 Additional functions....................................................................................48
4.6.1 Sensors and changeover functions .............................................49
4.6.2 Presence detector.......................................................................50
4.6.3 Output functions..........................................................................52
4.6.4 Monitoring and limiting functions .................................................54
4.6.5 User operation / Indication ..........................................................57

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4.6.6 Humidity (RDG2..KN)................................................................. 60
4.6.7 Scheduler .................................................................................. 64
4.6.8 M/S, manager/subordinate (RDG2..KN) ..................................... 65
4.6.9 Preventive operation.................................................................. 69
4.6.10 NFC communication................................................................... 69
4.6.11 IAQ - CO2 monitoring and control (RDG2..KN)........................... 69
4.6.12 Power reserve clock (RDG2..T).................................................. 76
4.7 Control sequences.................................................................................... 77
4.7.1 Sequence overview (setting via P001)........................................ 77
4.7.2 Application mode ....................................................................... 78
4.7.3 2-pipe fan coil unit...................................................................... 80
4.7.4 2-pipe fan coil unit with electric heater........................................ 81
4.7.5 2-pipe fan coil unit with radiator or floor heating.......................... 83
4.7.6 2-stage on 2-pipe/4-pipe heating and cooling ............................. 85
4.7.7 4-pipe fan coil unit...................................................................... 90
4.7.8 4-pipe fan coil unit with electric heater........................................ 95
4.7.9 Chilled/heated ceiling and radiator applications .......................... 97
4.7.10 Compressor applications............................................................ 98
4.7.11 Applications with external AQR sensor or QMX room operator unit
(RDG2..KN) ............................................................................... 99
4.7.12 Setpoints and sequences........................................................... 99
4.8 Control outputs........................................................................................101
4.8.1 Overview...................................................................................101
4.8.2 Control output configuration for 6-port valve (P201)...................105
4.8.3 Control output configuration (setting via DIP switches 7/8 or tool,
and P201/P203/P204/P205)......................................................106
4.9 Fan control ..............................................................................................108
4.10 Multifunctional input, digital input..............................................................115
4.11 Handling system faults.............................................................................117
4.12 KNX communications (RDG2..KN)...........................................................118
4.12.1 S-Mode.....................................................................................118
4.12.2 M/S, Manager/subordinate configuration in KNX S-Mode ..........118
4.12.3 LTE-Mode.................................................................................121
4.12.4 Zone addressing in LTE-Mode (with Synco)..............................122
4.12.5 M/S, Manager/subordinate configuration in LTE-Mode ..............123
4.12.6 Example of heating and cooling demand zones.........................126
4.12.7 Send heartbeat and receive timeout..........................................126
4.12.8 Startup......................................................................................127
4.12.9 Heating and cooling demand.....................................................127
4.12.10 Fault and alarms function on KNX.............................................128
4.13 Communication objects (RDG2..KN)........................................................129
4.13.1 Overview...................................................................................129
4.13.2 Description of communication objects........................................131
4.14 Communication objects (LTE-Mode) (RDG2..KN).....................................137
4.15 Control parameters..................................................................................138
4.15.1 Parameter setting via local HMI.................................................138
4.15.2 Setting/downloading parameter via tool (RDG2..KN) .................139
4.15.3 Service level parameters...........................................................140

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4.15.4 Expert level parameters with diagnostics and test .....................142
5Supported tools.....................................................................................148
5.1 ETS.........................................................................................................148
5.1.1 Setting parameters in ETS........................................................149
5.2 ACS tool..................................................................................................151
5.2.1 Setting parameters in ACS........................................................151
5.2.2 Operation and monitoring with ACS...........................................152
5.2.3 Operation and monitoring with OZW772....................................157
5.3 PCT Go –Smartphone app......................................................................158
5.3.1 Commissioning parameter via PCT Go......................................159
5.3.2 Read live data via PCT Go........................................................160
6 Connection.............................................................................................161
6.1 Connection terminals...............................................................................161
6.2 Connection diagrams...............................................................................163
6.3 IAQ - CO2 connection diagrams (RDG2..KN)...........................................167
6.4 Application examples...............................................................................167
6.4.1 Humidity control........................................................................167
6.4.2 Relay functions.........................................................................170
6.4.3 Swap function and/or fan in the 2nd stage.................................172
6.4.4 IAQ -CO2 control (RDG2..KN)...................................................175
7 Technical data........................................................................................177
8 Dimensions............................................................................................183
Index ...............................................................................................................184

About this document
Revision history
1
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1 About this document
1.1 Revision history
Edition
Date
Changes
Section
Product no.
(product index)
1
September
2020
First version.
All
RDG200KN (A)
RDG260KN (A)
2
November
2020
●Update NFC communication info
●Update changeover picture
●Update the picture of DC 0…10 V fan
in "Fan control with modulating
heating/cooling control"
●Update info about geographical zones
P901 and P902
●Update ACS version info
●4.6.8
●4.7.9.2
●4.9
●4.12.3
●1.5, 5.2
3
January
2021
●Add 4-pipe/2-stage related info
●Add scheduler-info
●Add information on return flow
temperature control
●Add information on
manager/subordinate function
●Add EU-bac information
●Add information that terminal U1 is
also defined as output
●Add new parameters
●2.2, 3.2, 4.6, 4.6.4,
4.7.1, 4.7.6.2, 4.7.9,
4.7.12, 4.8.2, 5.2.2,
6.2
●3.3, 4.2, 4.4, 4.6,
4.6.5
●4.6, 4.6.4
●4.2.1, 4.6, 4.6.7
●7
●6.1
●4.15.4, 4.15.5
RDG200KN (B)
RDG260KN (B)
RDG200KN/BK (A)
RDG260KN/BK (A)
4
April 2022
●Add new variants RDG204KN and
RDG264KN
●Add IAQ info
●Add on/off damper control info
●Update master/slave to
manager/subordinate
●Add black version variants info
●2.1, 2.2, 4.15.4,
4.15.5
●3, 4.11
●4.6.3
●All
●2.1, 2.2, 7
RDG204KN (A)
RDG264KN (A)
5
February
2023
●Add new application 4-pipe with 6-
port PICV
●Add fan output for application 4-pipe
with 6-port ball valve as changeover
and PICV
●Add new variants RDG200T and
RDG260T
●2.4.1, 4.7.7.1,
4.7.7.2, 4.8.2
●4.7.9
●All
RDG200KN (D
RDG260KN (D)
RDG200KN/BK (D)
RDG260KN/BK (D)
RDG200T (A)
RDG260T (A)
6
June 2023
●Add forced ventilation info
●Add information on maximal limitation
for IAQ damper position
●Add information on PCT Go and
product index
●4.6.11, 4.15.3,
4.15.4
●4.6.11, 4.15.4
●5, 5.3
RDG204KN (B)
RDG264KN (B)

About this document
Reference documents
1
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1.2 Reference documents
Subject
Ref.
Document title
Document
number
Room thermostats with KNX
communications, RDG2..KN
[1]
Mounting instructions (RDG20..KN)
A6V11546008
[2]
Mounting instructions (RDG26..KN)
A6V11844861
[3]
Operating Instruction
A6V11545973
[4]
Data sheet
A6V11545853
Room thermostats RDG2..T
[5]
Mounting instructions (RDG20..T)
A6V13375634
[6]
Mounting instructions (RDG26..T)
A6V13375640
[7]
Operating Instruction
A6V13496247
[8]
Data sheet
A6V13375643
KNX manual
[9]
Handbook for Home and Building Control –Basic
Principles
(EN:https://my.knx.org/shop/product?language=en&pr
oduct_type_category=books&product_type=handbook
DE:
https://my.knx.org/shop/product?language=de&produc
t_type_category=books&product_type=handbook)
Synco and KNX (see
www.siemens.com/synco)
[10]
KNX bus, data sheet
CE1N3127
[11]
Communication via the KNX bus for Synco 700, 900
and RXB/RXL, Basic documentation
CE1P3127
[12]
Planning and commissioning protocol, communication
Synco 700
XLS template in
HIT
[13]
RMB795B central control unit, data sheet
CE1N3122
[14]
RMB795B central control unit, Basic documentation
CE1P3122
[15]
KNX S-Mode data points
CE1Y3110
[16]
Product data for ETS
[17]
ETS product data compatibility list
CE1J3110
[18]
Synco Application manual
0-92168en
Desigo engineering
documents
[19]
Desigo RXB integration –S-Mode
CM1Y9775
[20]
Desigo RXB/RXL integration –Individual addressing
CM1Y9776
[21]
Third-party integration
CM1Y9777
[22]
Synco integration
CM1Y9778
[23]
Working with ETS
CM1Y9779
Web server OZW772
[24]
Commissioning instructions
CE1C5701

About this document
Before you start
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1.3 Before you start
1.3.1 Trademarks
The table below lists the third-party trademarks used in this document and their
legal owners. The use of trademarks is subject to international and domestic
provisions of the law.
Trademarks
Legal owner
SyncoTM
AndroidTM
Google Inc.
App Store®
Apple Inc.
Google PlayTM
Google Inc.
All product names listed in the table are registered (®) or not registered (™)
trademarks of the owner listed in the table. We forgo the labeling (e.g. using the
symbols ® and ™) of trademarks for the purposes of legibility based on the
reference in this section.
1.3.2 Copyright
This document may be duplicated and distributed only with the express permission
of Siemens, and may be passed only to authorized persons or companies with the
required technical knowledge.
1.3.3 Quality assurance
This document is prepared with great care.
●The contents of this document are checked at regular intervals.
●Any corrections necessary are included in subsequent versions.
●Documents are automatically amended as a consequence of modifications and
corrections to the products described.
Please make sure that you are aware of the latest document revision date.
If you find lack of clarity while using this document, or if you have any criticisms or
suggestions, please contact the Product Manager in your nearest branch office.
The addresses of the Siemens Regional Companies are available at
www.buildingtechnologies.siemens.com.

About this document
Target audience, prerequisites
1
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1.3.4 Document user/request to the reader
Before using products from Siemens Industry, Inc., it is important that you read the
documents supplied with or ordered at the same time as the products (equipment,
applications, tools, and so on) carefully and in full.
We assume that persons using our products and documents are authorized and
trained appropriately and have the technical knowledge required to use our
products as intended.
More information on the products and applications is available:
●On the intranet (Siemens employees only) at
https://wse04.siemens.com/content/P0002723/SitePages/Home.aspx
●From the Siemens branch office near you
www.buildingtechnologies.siemens.com or from your system supplier
●From the support team at headquarters [e-mail]
if there is no local point of contact
Siemens assumes no liability to the extent allowed under the law for any losses
resulting from a failure to comply with the aforementioned points or for the
improper compliance of the same.
1.4 Target audience, prerequisites
This document assumes that users of the RDG2..KN room thermostats are familiar
with the ETS tool, Synco ACS tool or both and can use them.
It is also assumed that these users are aware of the specific conditions associated
with KNX.
In most countries, specific KNX know-how is conveyed through training centers
certified by the KNX Association (see www.knx.org/).
For reference documentation, see Reference documents [➙6].
1.5 Glossary
The inputs, outputs and parameters of an application can be influenced in various
ways. These are identified by the following symbols in this document:
Parameters identified by this symbol are set using ETS.
Parameters identified by this symbol are set using ACS.
Note!
Setting RDG2..KN KNX parameters is only supported by the
following tool versions:
●ETS5 or higher versions
●ACS version 13.03 or higher
Inputs and outputs identified by this symbol communicate with
other KNX devices.
They are called communication objects (CO).
The communication objects of the RDG2..KN works partly in S-
Mode, partly in LTE-Mode, and partly in both. These objects are
described accordingly.
A list of the parameters is shown in Control parameters [➙138].

Overview
Types
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2 Overview
2.1 Types
For fan coil units, universal applications and compressors in DX-type equipment
applications
Product no.
Stock no.
Housing
color
Operating
voltage
Fan
Number of control outputs
Built-in
sensor
3-speed
DC
On/Off
PWM
3-pos
DC
On/Off
(3-wire)
T:
Temperature
H: Humidity
CO2
RDG200KN
S55770-T409
White
AC 24 V or
AC 230 V
✓
✓1)
4
4
2
‒
2
T, H
RDG200KN/BK
S55770-T452
Black
AC 24 V or
AC 230 V
✓
✓1)
4
4
2
‒
2
T, H
RDG204KN
S55770-T410
White
AC 24 V or
AC 230 V
✓
✓1)
4
4
2
1
2
T, H, CO2
RDG260KN
S55770-T412
White
AC 24 V or
DC 24 V
✓
✓1)
‒
‒
‒
4
‒
T, H
‒
✓1)
2 2)
‒
‒
‒
‒
RDG260KN/BK
S55770-T453
Black
AC 24 V or
DC 24 V
✓
✓1)
‒
‒
‒
4
‒
T, H
‒
✓1)
2 2)
‒
‒
‒
‒
RDG264KN
S55770-T413
White
AC 24 V or
DC 24 V
✓
✓1)
‒
‒
‒
4
‒
T, H, CO2
‒
✓1)
2 2)
‒
‒
‒
‒
Product no.
Stock no.
Housing
color
Operating
voltage
Fan
Number of control outputs
Built-in
sensor
3-speed
DC
On/Off
PWM
3-pos
DC
On/Off
(3-wire)
T:
Temperature
H: Humidity
CO2
RDG200T
S55770-T457
White
AC 230 V
✓
✓1)
3
3
2
‒
2
T
RDG260T
S55770-T458
White
AC 24 V or
DC 24 V
✓
✓1)
‒
‒
‒
3
‒
T
‒
✓1)
2 2)
‒
‒
‒
‒
1) The terminal Y50 is used as DC 0…10 V output.
2) The output is relay On/Off.
Standalone products
KNX communication products

Overview
Functions
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2.2 Functions
The RDG2.. room thermostats are designed for use with the following:
Fan coil units via On/Off or modulating/DC control outputs:
●2-pipe system
●2-pipe system with electric heater
●2-pipe system with radiator/floor heating
●2-pipe/2-stage system also suitable for applications with 1-stage heating/ 2-
stage cooling, or 2-stage heating/1-stage cooling
●4-pipe system
●4-pipe system with electric heater
●4-pipe system with a 6-port ball valve (RDG26..)
●4-pipe system with 6-port PICV (RDG26..)
●4-pipe system with PICV and 6-port ball valve as changeover (RDG26..)
●4-pipe/2-stage system also suitable for applications with 1-stage heating/ 2-
stage cooling, or 2-stage heating/1-stage cooling (RDG2..KN)
Chilled/heated ceilings (or radiators) via On/Off or modulating/DC control
outputs:
●Chilled/heated ceiling
●Chilled/heated ceiling with electric heater
●Chilled/heated ceiling and radiator/floor heating
●Chilled ceiling and radiator/floor heating
●Chilled and/or heated ceiling/2-stage
●Chilled/heated ceiling (4-pipe) with 6-port ball valve (RDG26..)
●Chilled/heated ceiling (4-pipe) with 6-port PICV (RDG26..)
●Chilled/heated ceiling with PICV and 6-port ball valve as changeover (RDG26..)
Compressor applications via On/Off control:
●Heating or cooling, compressor in DX-type equipment
●Heating or cooling, compressor in DX-type equipment with electric heater
●Heating and cooling, compressor in DX-type equipment
●Heating or cooling/2-stage, compressor in DX-type equipment
●Weekly scheduler
●M/S - manager/subordinate function between thermostats (RDG2..KN)
●Room temperature control via built-in temperature sensor or external room
temperature/return air temperature sensor
●Room relative humidity control via built-in humidity sensor or external room
humidity sensor (humidity function can be disabled.) (RDG2..KN)
●Min./max. humidity control by shifting temperature setpoint and releasing
contact for dehumidifier/humidifier (RDG2..KN)
●Floor heating temperature limitation
●Min. and max. supply air temperature limitation
●Selection of operating modes via operating mode button
●Button lock for all buttons independently (automatically or manually)
●Changeover between heating and cooling mode (automatic via local sensor or
bus, or manually)
●Parameters protected by password (disabled by default)
Control application
General functions

Overview
Functions
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●Purge function together with 2-port valve
●Valve kick/exercising function to prevent gripping
●Reminder to clean fan filters
●Indoor air quality monitoring and controlling (CO2) via fresh air damper
(RDG204KN & RDG264KN)
●Start forced ventilation via fan button for bringing fresh air in the room
(RDG2..4KN)
●Black color versions (RDG200KN/BK & RDG260KN/BK)
●Delta temperature control
Limiting temperature difference between flow and return temperature for water
to optimize the system and reduce energy consumption in district heating
systems
●Power reserve clock for 20 h during power failure (RDG2..T)
●Min. and max. limitation of room temperature setpoint:
–Comfort limitation (min. and max. limitation)
–Energy saving concept (min. and max. limitation separate for heating and
cooling)
●Temporary Comfort mode extension
●Green leaf indication function (RDG2..KN)
●Display of current room temperature or setpoint in ℃, ℉or both
●Absolute and relative setpoint indication (RDG2..KN)
●Display of CO2value in ppm (parts per million) or text (GOOD; FAIR; BAD:
RDG204KN & RDG264KN)
●Application selection via DIP switches or external commissioning software
(RDG2..KN: ACS, ETS and Siemens smartphone app PCT Go; RDG2..T:
Siemens smartphone app PCT Go)
●Parameter download with external commissioning software (RDG2..KN: ACS,
ETS and Siemens smartphone app PCT Go; RDG2..T: Siemens smartphone
app PCT Go)
●Reloading factory settings for commissioning and control parameters
●1-speed, 3-speed or DC 0...10 V fan control on RDG20.. and RDG26..
(automatic or manual fan)
●Advanced fan control function, e.g. fan kick, fan start delay, selectable fan
operation (enable, disable, depending on heating/cooling mode, or min. and
max. speed setting)
●Fan start depending on fan coil temperature (heating) to avoid cool air while
heating
●Enabling fan output only in the 2nd stage (2-pipe/2-stage, 4-pipe/2-stage
(RDG2..KN))
●Enabling fan output only in the 2nd stage (2-pipe/2-stage (RDG2..T))
●Switching fan speed from manual to automatic in the dead zone to avoid
energy waste (selectable function)
●Swap function for 2-pipe and 2-stage application by switching the 1st stage
heating to 2nd stage cooling
●In 2-stage applications, limit the number of heating or cooling sequence to one
●Control of 6-port ball valve and for 6-port PICV, DC 0…10 V, DC 2…10 V and
inverted signals DC 10…0 V, DC 10…2 V (RDG26..)
●Control of 6-port ball valve as changeover (On/Off –open/close signal) and
PICV DC 0…10 V
Setpoints and display
Setting
Fan
Special functions

Overview
Functions
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●Control of 6-port ball valve via KNX S-Mode objects (RDG20..KN and
RDG26..KN)
●Flow limitation function for PICV in heating and cooling mode (RDG26..)
●Set holiday period to reduce energy consumption during absences (holidays)
●For 6-port PICV (RDG26..)
–During commissioning, maximal water flow selection in l/h for heating
(P260) and for cooling (P261) independently via PCT Go
–During operation, read water flow (l/h) via PCT Go live data function
●Selectable relay functions
–Switch off external equipment during Protection mode
–Switch on external equipment (e.g., pump) during heating/cooling demand
–Output status heating/cooling sequence
–Dehumidification/humidification control output (RDG2..KN)
●2 multifunctional inputs X1, X2, and 1 multifunctional input/output U1 set as
input, selectable for:
–Window contact switches operating mode to Protection
–Presence detector switches operating mode to Comfort
–Sensor for automatic heating/cooling changeover
–Switch for manual heating/cooling changeover
–External room temperature or return air temperature sensor
–Dewpoint sensor
–Enable electric heater
–Fault input
–Monitor input for temperature sensor or switch status
–Supply air temperature sensor
–Coil temperature sensor
–External temperature limit
–Hotel presence detector
●1 multifunctional input/output U1 set automatically as output for:
–4-pipe/2-stage as 2nd stage cooling output (RDG26..KN)
–IAQ control (damper and fan) (RDG204KN & RDG264KN)
●3 multifunctional inputs X1, X2 and X3, selectable for:
–Window contact switches operating mode to Protection
–Presence detector switches operating mode to Comfort
–Sensor for automatic heating/cooling changeover
–Switch for manual heating/cooling changeover
–External room temperature or return air temperature sensor
–Dewpoint sensor
–Enable electric heater
–Fault input
–Supply air temperature sensor
–Coil temperature sensor
–External temperature limit
–Hotel presence detector
●KNX bus (terminals CE+ and CE-) for communication with Synco devices or
KNX compatible devices
●M/S - manager/subordinate function via LTE-Mode or S-Mode to synchronize
equipment and save energy in open spaces
Inputs/outputs
(RDG2..KN)
Inputs (RDG2..T)
KNX communication
features (RDG2..KN)

Overview
Functions
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●M/S - manager/subordinate alarm management via LTE-Mode allowing for
subordinate alarm display on the manager
●Display of outside temperature, humidity, CO2or time of day from KNX bus
●Time scheduling and central control of setpoints from KNX bus
●Control of Economy setpoints via KNX bus
●Relative humidity setpoint via KNX bus
●Control of KNX actuators and fan via S-Mode objects
●Energy supply optimization via energy demand signal via Synco RMB795B
central control unit
●Interworking with Siemens AQR.. and QMX.. sensors for room humidity, room
temperature and CO2measurement
●Interworking with Siemens QMX.. room operator units for room humidity, room
temperature and operating commands for fan, operating mode and setpoints
●Commissioning KNX area, line and device address via mobile application PCT
Go
Overview difference between KNX (RDG2..KN) and standalone (RDG2..T) versions
Functions
Descriptions
KNX
Standalone
KNX communication related
functions
●Communicating thermostat [➙118]
●Commissioning via ETS, ACS [➙22]
✓
●Manager/Subordinate [➙65]
✓
Power switch (RDG2..KN)
●Power switch AC 230 V / AC 24 V [➙47]
✓
●Support AC 24 V 2-pos/3-pos actuators [➙14]
✓
Functional input/output
●Functional input/output U1 [➙115]
✓
●Multifunctional input X3 (sensor, switch) [➙115]
✓
●Monitor input for temperature sensor or switch status
[➙115]
✓
Application
●4-pipe/2-stage [➙88]
✓
Time clock
●Power reserve clock for 20 h during power failure
[➙76]
✓
Others
●Humidity [➙60]
●Indoor air quality control [➙69]
●Greenleaf indication [➙57]
✓

Overview
Accessories
2
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A6V11545892_en--_e
2.3 Accessories
Product
series
Type
Product/stock no.
Datasheet
RDG2..KN
KNX power supply 160 mA
(Siemens BT LV)
5WG1 125-1AB02
TPI_N125
KNX power supply 320 mA
(Siemens BT LV)
5WG1 125-1AB12
TPI_N125
KNX power supply 640 mA
(Siemens BT LV)
5WG1 125-1AB22
TPI_N125
RDG2..KN
RDG2..T
Mounting adapter for
RDG2..KN and RDG2..T
ARG200: S55770-
T438 1）
-
1）ARG200 mounting adapter is used to wall-mount the RDG2..KN and RDG2..T
where a conduit box is not available. For easier wiring, removable knockouts on all
sides are available. For dimensions, see Dimensions [➙183].
2.4 Equipment combinations
Type of unit
Product no.
Datasheet *)
Cable temperature or changeover
sensor, cable length 2.5 m NTC (3
kΩ at 25 °C)
QAH11.1
1840
Cable temperature sensor PVC 2 m,
LG-Ni1000
QAP22
1831
Room temperature sensor NTC (3
kΩ at 25 °C)
QAA32
1747
Room temperature sensor LG-
Ni1000
QAA24
1721
Front modules with passive
temperature measurement LG-
Ni1000
AQR2531ANW
1408
Strap-on temperature sensor LG-
Ni1000
QAD22
1801
Condensation monitor
QXA21..
A6V10741072
Flush-mount KNX room sensor (base
and front module)
AQR2570N..
AQR2532NNW
AQR2533NNW
AQR2535NNW
1411
Wall-mounted KNX sensors
QMX3.P30
QMX3.P70
1602

Overview
Equipment combinations
2
A6V11545892_en--_e
15 | 186
Type of unit
Product no.
Datasheet *)
Thermal actuator (for radiator valves)
AC 230 V, NC
STA321.. 1)
A6V14028280
Thermal actuator (for radiator valves)
AC 24 V, NC
STA121.. 1)
A6V14028280
Thermal actuator AC 230 V (for small
valves 2.5 mm), NO
STP321.. 1)
A6V14028280
Thermal actuator AC 24 V (for small
valves 2.5 mm), NO
STP121.. 1)
A6V14028280
Type of unit
Product no.
Datasheet *)
Electric actuator, 3-position (for
radiator valves) AC 230 V
SSA331..
A6V11858276
Electric actuator, 3-position (for 2-
and 3-port valves/V..P45) AC 230 V
SSC31
4895
Electric actuator, 3-position (for small
valves 2.5 mm) AC 230 V
SSP31..
4864
Electric actuator, 3-position (for small
valves 5.5 mm) AC 230 V
SSB31..
4891
Electric actuator, 3-position (for small
valve 5 mm) AC 230 V
SSD31..
4861
Electric actuator, 3-position (for
valves 5.5 mm) AC 230 V
SAS31..
4581
Rotary actuators for ball valves, 3-
position
GDB331.9E
4657
Rotary actuators for ball valves, 2 or
3-position
GDB141.9E
GDB341.9E
A6V10636150
Type of unit
Product
no.
Datasheet *)
Electric actuator, 3-position (for
radiator valves) AC 24 V
SSA131..
A6V11858276
Electric actuator, 3-position (for 2-
and 3-port valves/V..P45) AC 24 V
SSC81
4895
Electric actuator, 3-position (for small
valves 2.5 mm) AC 24 V
SSP81..
4864
Electric actuator, 3-position (for small
valves 5.5 mm) AC 24 V
SSB81..
4891
Electric actuator, 3-position (for small
valve 5 mm) AC 24 V
SSD81..
4861
On/Off and PWM
actuators 1)
3-positon actuators
AC 230 V
3-positon actuators
AC 24 V

Overview
Equipment combinations
2
16 | 186
A6V11545892_en--_e
Type of unit
Product
no.
Datasheet *)
Electromotive On/Off actuator
SFA21..
SFA71..
4863
Electromotive On/Off valve and actuator
(only available in AP, UAE, SA and IN)
MVI../MXI..
A6V11251892
Electromotive actuator
SUA21/3
A6V10446174
Electromotoric actuator for zone valve
SUE21
A6V11866674
Electromotoric actuator for PICV
SUE21P
A6V11780777
Type of unit
Product no.
Datasheet *)
Electric actuator, DC 0…10 V (for
radiator valves)
SSA161..
A6V11858278
Electric actuator, DC 0…10 V (for
2- and 3-port valves/V..P45)
SSC161..
A6V12681511
Electric actuator, DC 0…10 V (for
small valves 2.5 mm)
SSF161..
A6V12681511
Electric actuator, DC 0…10 V (for
small valves 5.5 mm)
SSB161..
A6V12681511
Electromotive actuator,
DC 0…10 V (for valves 5.5 mm)
SAS61..
4581
Electrothermal actuator, AC 24 V,
NC, DC 0…10 V, 1 m
STA161..
A6V14028280
Electrothermal actuator, AC 24 V,
NO, DC 0…10 V, 1 m
STP161..
A6V14028280
Rotary actuators for ball valves
AC 24 , DC 0…10 V
GDB161.9E
4657
Type of unit
Product no.
Datasheet *)
Rotary actuators for 6-port ball
valves control:
•6-port ball valve VWG41..
•6-port PICV VWPG51..
For details, see Recommended RDG
actuators and 6-port valves
combinations [➙18].
GDB161.9../6W
A6V12986395
Note: Set the control signal accordingly if RDG26.. is required to control
GDB161.9E, see Control output configuration for 6-port valve (P201) [➙105].
DC 0…10 V actuators
DC 0…10 V actuators 6-
port / PICV (RDG26..)
On/Off actuators

Overview
Equipment combinations
2
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17 | 186
Type of unit
Product no.
Datasheet *)
Air damper actuators DC 0…10 V,
AC/DC 24 V
GQD166.1A
GQD161.1A
4604
Air damper actuators DC 0…10 V,
AC 24 V
GDB16..1
4634
GLB16..1
Air damper actuators DC 0…10 V,
AC/DC 24 V
GMA16..1
4614
Air damper actuators DC 0…10 V,
AC 24 V
GEB16..1
4621
Air damper actuators DC 0…10 V,
AC/DC 24 V
GCA16..1
4613
Air damper actuators DC 0…10 V,
AC 24 V
GBB16..1
4626
GIB16..1
VAV compact controller
GDB181.1..
A6V10631834
GLB181.1..
Type of unit
Product
no.
Datasheet *)
Air damper actuators 2-position,
AC 230 V
GQD32..1
4604
GMA32..1
4614
GCA32..1
4613
Type of unit
Product
no.
Datasheet *)
Air damper actuators 2-position,
AC/DC 24 V
GQD12..1
4604
GMA12..1
4614
GCA12..1
4613
DC 0…10 V damper
actuators
On/Off damper actuators
AC 230 V
On/Off damper actuators
AC 24 V

Overview
Equipment combinations
2
18 | 186
A6V11545892_en--_e
Type of unit
Product no.
Datasheet *)
Rotary actuators for ball valves KNX S-
Mode
GDB111.9E/KN
A6V10725318
VAV compact controller KNX / PL-Link
GDB181.1E/KN
3547
*) The documents can be downloaded from https://hit.sbt.siemens.com
1) The PWM control on 2 or more thermal actuators in parallel can be considered
for floor heating/radiator applications. If several fan coil units are controlled by the
same room thermostat, motorized actuators with On/Off or 3-position control are
preferred.
For more information about parallel operation and the max. number of actuators
that can be used, refer to the data sheets of the selected actuator type and the
following list:
Max. number of actuators in parallel on RDG20.. (AC 230 V):
●6 SS..31.. actuators (3-position)
●10 SFA.., SUA.., MVI.., MXI.. On/Off actuators
●Parallel operation of SAS31 not available
Max. number of actuators in parallel on RDG20..KN (AC 24 V):
●6 SS..31.. actuators (3-position)
●2 SFA71.. On/Off actuators
●Parallel operation of SAS81 not available
Max. number of actuators in parallel on RDG26.. (AC 24 V):
●10 SS..61.. actuators (DC)
●10 SFA.., SUA.., MVI.., MXI.. On/Off actuators
●10 SAS61.. actuators (DC)
●10 GDB161.9../6W
2.4.1 Recommended RDG actuators and 6-port valves
combinations
Use the following RDG260.. versions (see below) to ensure optimal temperature
control performance of GDB161.9../6W actuators (with 6-port ball valves VWG41..
or 6-port PICV VWPG51..):
●RDG26..KN.. with product index D or higher
●RDG26..T with product index Z, A or higher
Check the device version compatibility in Control output configuration for 6-port
valve (P201) [➙105] for applications with older RDG product indices, GDB161.9E
or competitor actuators.
KNX actuators
(RDG2..KN)
Note:

Overview
Integration via KNX bus
2
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2.5 Integration via KNX bus
The RDG2..KN room thermostats can be integrated as follows:
●Integration into Synco 700 system via LTE-Mode (easy engineering)
●Integration into Desigo via group addressing (ETS) or individual addressing
–Max. 60 RDG2..KN per line and do not mix RDG2..KN with other KNX
products on the same line
●Integration into Desigo CC via IP router
●Integration into third-party systems via group addressing (ETS)
The following KNX functions are available:
●Central time program and setpoints, e.g., when using the RMB795B central
control unit
●Outside temperature or time of day via bus displayed on thermostat
●Remote operation and monitoring with web browser using the OZW772 web
server
●Maximum energy efficiency due to exchange of relevant energy information,
e.g., with Synco 700 controllers (e.g., heating demand, cooling demand)
●Alarming, e.g., external fault contact, condensation, clean filter, and so on
●Monitoring input for temperature sensor or switch
Engineering and commissioning can be done by using:
●Local DIP switches and HMI
●Synco ACS
●ETS5 or higher versions
●Siemens smartphone application PCT Go
The RDG2..KN room thermostats are especially tailored for integration into the
Synco 700 system and operate together in LTE-Mode. This extends the field of use
of Synco for individual room control in conjunction with fan coil units, chilled
ceilings and radiators.
Synco 700

Overview
Integration via KNX bus
2
20 | 186
A6V11545892_en--_e
Synco 700
Building automation and control system (BACS)
Gateway
Connection of meters via Modbus
OZW
Web server, connection of Synco, RDG/RDF & GAMMA
RMB
Central control, RDG/RDF integration
RDG/RDF
Thermostats for room climate control
Gamma Instabus
For lighting control and other room electrical applications
The RDG2..KN thermostats can be integrated into the Siemens building
automation and control systems (BACS) Desigo or into third-party systems. Either
S-Mode (group addressing) or individual addressing can be used for integration.
Synco topology
Legend
Desigo and third-party
systems