Siemens RDS120 User manual

A6V10807603_a
Siemens AG
2017-07-18
Building Technologies
Smart Thermostat
RDS120
Ultra easy to use cloud connected IAQ controller for managed residential and light
commercial applications
●Easy to read, backlit, auto-dimming 3.5” color LCD touch
●All essential user interaction on home screen –no complex operations
●Intuitive remote user control using Apple iOS and Android mobile phone
applications
●One-touch green leaf button to maximize energy efficiency
●Industry-unique built-in VOC sensor senses and regulates indoor air quality
beyond just CO2
●Built-in humidity sensor for complete comfort control
●Built-in occupancy sensor and window / door contact enables smart occupancy
control
●Full, easy to program user schedule

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Thermostat highlights
●Built-in VOC sensor senses wide range of offending organic odors that contribute to stale air
and drives ventilation control
●Easy to understand tri-level air quality indication: Good, Okay, Poor
●Humidity control using built-in or remote humidity sensor
●One-touch operation for Away, Fan, and Heating/Cooling mode
●Temperature setpoint limits for use in public spaces
●Screen lock protection against unauthorized access
●Room temperature control using built-in temperature sensor, optional remote sensor or
averaged between built-in and remote sensors
●PID algorithm for precise control
●Advanced energy saving control strategy such as free cooling
●Two multifunctional inputs, optional and configurable for:
–Room temperature
–Operating mode switch
–Universal contact
–Outside air temperature
–Room humidity
–Presence detector
–Condensation monitor
–Room air quality
●Six relay outputs for:
–Equipment control (see Application examples [➙ 16])
–One output for humidifier, dehumidifier or air damper
●An additional universal output configurable for humidification, dehumidification or indoor air
quality control
●Guided Setup Wizard
●Over the air (OTA) firmware upgradable
●Green leaf button: when the leaf indicator is Green, the unit is operating per program for
efficiency. When setting is overridden, the leaf turns Red. Touch the leaf to toggle between
scheduled or overridden operation.
Mobile app features
●Supports iOS and Android smartphones
●Each day individually programmable between three mode:
–"Comfort": comfort settings during occupied periods
–"Pre-comfort": setting for evening etc. when maximum comfort is not required
–"Eco": setting for periods during absence to maximize energy savings
●Same operational interface as on thermosat, one-touch "Away", “Fan”, and "Heating" /
"Cooling" mode settings
●User account management
●Monitor temperature and humidity
●Monitor indoor air quality: “Good”, “Okay”, “Poor”
●Secure access and data transmission with Siemens Cloud Computing Platform
Application
The RDS120 is designed to control Heat Pump or Conventional HVAC heating and cooling
applications. It can control up to three stages of heating and two stages of cooling in

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conventional systems and up to two compressors and two stages of auxiliary heat in heat pump
systems.
Mechanical design
The room thermostat consists of the following parts:
●Front housing with touch screen and sensors
●Back housing with terminals and relays
●Two different sized metal mounting plates plus a plastic decoration frame
Operation and settings
Normal display
1
System setup screens and detailed information display
2
Shows if the system is working in an energy-optimized mode. If the leaf is red, some
predefined settings have been changed. Tap the red leaf to restore energy-saving mode.
The leaf turns green.
3
Sensed room temperature
4
Tap once to toggle between "Home" and "Away".

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5
Shows if the thermostat works automatically ( ) or manually ( ). Please note:
●If there is Cloud connection and the scheduler has been programmed, the thermostat
will follow it. Any temporary change of the temperature setpoint is effective only during
the currently scheduled mode.
●If there is Cloud connection, but the schedule has not been programmed, the
thermostat follows the default schedule.
●If there is no Cloud connection, the thermostat will have no schedule and will be
operated manually.
6
Tap to select a fan mode (AUTO/ON).
7
Tap or slide to change the room temperature setpoint.
Idle display
1
Sensed relative humidity
2
Shows room air quality:
●If the icon is green, air quality is Very Good.
●If the icon is orange, air quality is Average.
●If the icon is red, air quality is Poor.
3
Shows if the system is in an energy-optimized mode. If the leaf is red, some pre-defined
settings have been changed. Tap the red leaf to restore to energy-saving mode. The leaf
turns green.
4
Sensed room temperature
NOTE: Depending on how the thermostat is set up, the displayed options under the idle mode
may be different.

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Ordering information
Product number
Stock number
Description
RDS120
S55772-T101
Room thermostat
Ordering
●When ordering, indicate product number, stock number and description
●Order valve actuators separately
Contents
Items
Quantity
Thermostat (front and rear modules)
1
Metallic mounting plates (small & big)
2
Plastic frame
1
Set of screws and plastic insert
1
Quick guide
1
Mounting instructions
1
Cabling sticker
1
Activation code sticker
1
Associated equipment
Remote sensors
Type of unit
Product no.
LG-
Ni1000
at 32 ℉
Pt1000
at 32 ℉
NTC 10k
at 77℉
DC 0 to
10 V
Datasheet*)
Room temperature sensors
- Wall-mount
QAA24
x
1721
QAA2012
x
1745
QAA2030
x
1745
QAA2061
x
1749
QAA2061D2)
x
1749
- Flush-mount1)
AQR2531ANW
x
1408
AQR2532NNW
x
1411
- Concealed
QAA64
(vandal-proof)
x
1722
Outdoor temperature sensors
QAC22
x
1811
QAC2012
x
1811
QAC2030
x
1811
QAC3161
x
1814

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Type of unit
Product no.
LG-
Ni1000
at 32 ℉
Pt1000
at 32 ℉
NTC 10k
at 77℉
DC 0 to
10 V
Datasheet*)
Cable temperature sensors
QAP21.3
x
1832
QAP22
x
1831
QAP21.3/8000
x
1832
QAP2012.150
x
1831
QAP1030.200
x
1831
Room humidity sensors
- Wall-mount
QFA2000
x
1857
- Wall-mount
including
temperature
QFA2020
x (T)
x (r.h.)
1857
QFA2060
x (T+r.h.)
1857
QFA2060D2)
x (T+r.h.)
1857
- Flush-mount1)
including
temperature
AQR2534ANW
+ AQR2540Nx
x (T)
x (r.h.)
1410
AQR2535NNW
+ AQR2540Nx
x (T+r.h.)
1410
Indoor air quality sensors
- VOC
QPA1000
x
1961
- CO2
QPA2000
x
1961
- VOC + CO2
QPA2002
x
1961
QPA2002D2)
x
1961
- CO2including
temperature
QPA2060
x
1961
QPA2060D2)
x
1961
QPA2080
x
x
x
x (CO2)
1961
QPA2080D2)
x
x
x
x (CO2)
1961
- Flush-mount1) 3)
AQR2546
x
1410
AQR2548
x
1410
*) The documents can be downloaded from http://siemens.com/bt/download by specifying the
product number as shown in the above table.
1) Requires mounting plate and/or design frames;
2) With digital display;
3) Model according to front and base module combination.

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Accessory
Type of unit
Product no.
Datasheet*
White decoration frame and metallic
mounting plate for installation on
rectangular conduit box (10 sets)
ARG100.01
S55772-T102
A6V11190640
* The documents can be downloaded from http://siemens.com/bt/download by specifying the
product number as shown in the above table.
Product documentation
Topic
Title
Document number
Mounting and installation
Installation guide
A5W90001425
Installation and operation
User guide
A6V10733807
Startup wizard
Quick guide
A5W90001422
CE declaration
A5W90002476
RCM declaration
A5W90002477
Product environmental declaration
A5W90003412
Related documents such as environmental declarations, CE declarations, etc., can be
downloaded at: http://siemens.com/bt/download.
Notes
Security
CAUTION
National safety regulations
Failure to comply with national safety regulations may result in personal injury and property
damage
●Observe national provisions and comply with the appropriate safety regulations.
Engineering
See Product documentation [➙ 7] for information on engineering, selection and sizing
connecting cables for supply voltage and field devices.

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Installation location
●The devices are suitable for wall installation.
●Recommended height: 5 feet above the floor.
●Do not install the devices in recesses, shelves, behind curtains or doors, or above or near
heat sources.
●Avoid direct exposure to sun and drafts.
●Seal the conduit or backwall as drafts can affect sensor readings.
●Observe maximum ambient conditions.
Wiring
Use only class 2 rated power source with proper current limiting.
Installation
WARNING
No user serviceable parts inside.
Risk of fire and injury due to short-circuits
●Use properly sized wires for connections
Commissioning
Refer to the Quick guide and User guide (see Product documentation [➙ 7]) to configure your
device. Commissioning includes the following:
●Internet connection
●Application setup
●Account registration and device pairing
NOTE: Before configuring your thermostat, make sure you have Internet connection, a valid
email address, and a smartphone.

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Operation
Operating system
OS
OS version
App store
iOS
iOS 10 or above
App store®
Android
AndroidTM 5.0 or above
Google PlayTM
Maintenance
The thermostat is designed for maintenance-free operation.
Disposal
The device is considered an electronics device for disposal in terms of European
Directive 2012/19/EU and may not be disposed of as domestic garbage.
●Dispose of the device through channels provided for this purpose.
●Comply with all local and currently applicable laws and regulations.
Regulatory information
Radio equipment directive
The equipment is using harmonized frequency in Europe, and also compliances with the Radio
Equipment Directive (2014/53/EU, formerly 1999/5/EC).
ISED regulations
This device complies with Industry Canada license-exempt RSS standard(s).
Operation is subject to the following two conditions: (1) this device may not cause interference,
and (2) this device must accept any interference, including interference that may cause
undesired operation of the device.
Le present appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio
exempts de licence. L'exploitation est autorisee aux deux conditions suivantes : (1) l'appareil ne
doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage
radioelectrique subi, meme si le brouillage est susceptible d'en compromettre le fonctionnement.

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FCC regulations
WARNING
Modification of this device to receive cellular radio telephone service signals is prohibited under
FCC rules and federal law.
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected. Consult the dealer or an experienced radio/TV technician for help.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance of 20cm
between the radiator & your body.
Changes or modifications not expressly approved by the party responsible for compliance
could void the user's authority to operate the equipment.
Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.

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Technical data
Power supply
Power supply
Operating voltage
AC 24 V (±20%)
Frequency
48 to 63 Hz
Power consumption
Max. 9 VA
Max. power supply current
4 A current limited
Radio parameter
Radio parameter
Frequency band
2.4 to 2.4835 GHz
Maximum radio-frequency power
18 dBm
WLAN standard
IEEE 802.11b/g/n (HT20)
WLAN channel
1-11

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Inputs
Connections to multifunctional inputs X1 - M - X2
Passive temperature sensors
- Cable length max. (copper cable
section)
- NTC type
Room temperature range
Outdoor temperature range
- Ni type
Room temperature range
Outdoor temperature range
- Pt type
Room temperature range
Outdoor temperature range
300 ft (90 m) (16 AWG wire), 230 ft (70 m) (18 AWG wire)
200 ft (60 m) (18 AWG wire), 130 ft (40 m) (20 AWG wire)
NTC10K at 77 ℉ (25 ℃)
32 to 122 ℉ (0…50 °C)
-32 to 176 ℉ (-50…80 °C)
Ni1000 at 32 ℉ (0 ℃)
32 to 122 ℉ (0…50 °C)
-32 to 176 ℉ (-50…80 °C)
Pt1000_375/Pt1000_385 at 32 ℉ (0 ℃)
32 to 122 ℉ (0…50 °C)
-32 to 176 ℉ (-50…80 °C)
Active DC 0 V to 10 V sensors
- Room temperature range
(default)
- Outdoor temperature range
(default)
- Humidity range (default)
- CO2range (default)
- VOC range (default)
Note: min./max. configurable via parameters
32 to 122 ℉ (0…50 °C)
-32 to 176 ℉ (-50…80 °C)
0 to 100%
0 to 2000 ppm
0 to 100%
Digital contacts
- Operating action
- Contact sensing
- Parallel connection
- Input function
Selectable N.O./N.C.
DC 14 to 40 V, 8 mA (typical)
Max. 20 thermostats per switch
Selectable
Outputs
Relay contact capacity
Voltage
AC 24 V (±20%)
Current
Min. 0.02 A, Max. 1 A per output
Operational data
Setpoint range
45 to 95 °F (7…35 ℃)

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Built-in room temperature sensor
Temperature range
Accuracy at 77 °F (25 ℃)
Display resolution
32 to 122 °F
± 1.8 F (1 ℃)
1 F (0.5 ℃)
Built-in room humidity sensor
Humidity range
Accuracy at 77 °F (25 ℃)
Display resolution
0% to 100%
20% to 80%: ±3%
0% to 20%, 80% to 100%:
±5%
1%
System compatibility
System compatibility
Conventional
2 stages cooling, 3 stages heating
Heat pump
2 stages cooling and 2 stages heating (+2
stages auxiliary heating)
Connections
Interfaces
Micro USB
A service port is provided for firmware upgrade
and on-site diagnosis
Wiring connections
Screw terminals
Solid wires or prepared stranded wires:
Max. 1 x16 to 20 AWG
Conformity
Ambient conditions and protection classification
Safety class according to EN60730
Class III
Degree of protection of housing as per EN 60529
IP30
Classification as per EN 60730:
Function of automatic control devices
Type 1
Degree of contamination
2
Overvoltage category
III
Climatic ambient conditions:
Storage as per EN 60721-3-1
Class 1K3
Temperature 23 to 113 °F (-5 to 45 °C)
Humidity 5 to 95%
Transport (packaged for transport) as per EN
60721-3-2
Class 2K3
Temperature -13 to 158 °F (-25 to 70 °C)

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Ambient conditions and protection classification
Humidity 5 to 95%
Operation as per EN 60721-3-3
Class 3K5
Temperature 23 to 122 °F (-5 to 50 °C)
Humidity 5 to 95%
Mechanical ambient conditions:
Storage as per EN 60721-3-1
Class 1M2
Transport as per EN 60721-3-2
Class 2M2
Operation as per EN 60721-3-3
Class 3M2
Standards, directives and approvals
EU conformity (CE)
A5W90002476*)
RCM conformity
A5W90002477*)
FCC standards
FCC CFR 47 Part 15 Class C
IC standards
RSS-247 issue 1 May 2015, RSS-GEN issue 4 November 2014
UL
UL916
The United Arab Emirates
Authorization Number of TRA:
ER54733/17
Qatar
Saudi Arabia
Environmental compatibility
The product environmental declaration A5W90003412*) contains
data on environmentally compatible product design and
assessments (RoHS compliance, materials composition,
packaging, environmental benefit, disposal).
*) The documents can be downloaded from http://siemens.com/bt/download.
General data
General
Dimension
Refer to Dimensions
Weight
Thermostat with package, user document and accessory
15.3 oz (435 g)
Thermostat
9.5 oz (268 g)
Color
Silver plating
Housing: Pantone black

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Diagrams
Connection terminals
Terminal
Use
RH
Heating system transformer, AC 24 V
RC
Cooling system transformer, AC 24 V
C
Common, AC 24 V
W1/O/B
First heating stage in conventional systems or reversing valve in heat pump
W2/AUX
Second heating stage in conventional systems or third heating stage in heat
pump systems
W3/UNIV
Third heating stage in conventional systems, fourth heating stage in heat
pump systems or auxiliary function
Y1
First cooling stage in conventional systems and first heating stage in heat
pump systems
Y2
Second cooling stage in conventional systems and second heating stage in
heat pump systems
G
Fan
X1, X2
Remote input (sensor, detector, switch)
M
Measuring neutral for remote input (sensor, detector, switch)

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Wiring diagrams
Jumper is in place
Jumper is removed
Note:
●For US installations use Class 2 rated power source. For other installations, use current
protection with current rated at max. 4 A.
●If a single transformer is used, keep jumper RH-RC in place. Connect AC 24 V to the RC
terminal, and neutral to terminal C. If separate transformers are used for heating and
cooling systems, remove jumper RH-RC. Connect cooling AC 24 V to terminal RC, neutral
to terminal C and heating AC 24 V to terminal RH.
Application examples
Applications
1
1-stage heat pump and
outside air damper (optional)
control
HvacFnct19z
Fan
HCcl
1 stage
DmpOa
Dhum
Hum
HumFrsd DhumFrsd
TR AQualR HuRelRPscDet
HMI
21
°C
X X X
X
X
X
OpMod
Swi UCont CdnMon
2x 2x 2x 2x 2x 2x
TRBltn
PscDet
Bltn TchDet Bltn HuRelRBltnPrxDet
Bltn
TOa
2
1-stage heat pump, 1-stage
electric heating and outside
air damper (optional) control
HvacFnct19z
Hcl
1 stage
(El)
Fan
HCcl
1 stage
DmpOa
Dhum
Hum
HumFrsd DhumFrsd
TR AQualR HuRelRPscDet
HMI
21
°C
X X X
X
X
X
OpMod
Swi UCont CdnMon
2x 2x 2x 2x 2x 2x
TRBltn
PscDet
Bltn TchDet Bltn HuRelRBltnPrxDet
Bltn
TOa
3
2-stage heat pump and
outside air damper (optional)
control
HvacFnct19z
Fan
HCcl
2 stage
DmpOa
Dhum
Hum
HumFrsd DhumFrsd
TR AQualR HuRelRPscDet
HMI
21
°C
X X X
X
X
X
OpMod
Swi UCont CdnMon
2x 2x 2x 2x 2x 2x
TRBltn
PscDet
Bltn TchDet Bltn HuRelRBltnPrxDet
Bltn
TOa

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Applications
4
2-stage heat pump, 1-stage
electric heating and outside
air damper (optional) control
HvacFnct19z
Hcl
1 stage
(El)
Fan
HCcl
1 stage
DmpOa
Dhum
Hum
HumFrsd DhumFrsd
TR AQualR HuRelRPscDet
HMI
21
°C
X X X
X
X
X
OpMod
Swi UCont CdnMon
2x 2x 2x 2x 2x 2x
TRBltn
PscDet
Bltn TchDet Bltn HuRelRBltnPrxDet
Bltn
TOa
5
2-stage heat pump, 1-stage
gas heating (dual fuel)
HvacFnct19z
Hcl
1 stage
(Gas)
Fan
HCcl
2 stages
DmpOa
Dhum
Hum
HumFrsd DhumFrsd
TR AQualR HuRelRPscDet
HMI
21
°C
X X X
X
X
X
OpMod
Swi UCont CdnMon
2x 2x 2x 2x 2x 2x
TRBltn
PscDet
Bltn TchDet Bltn HuRelRBltnPrxDet
Bltn
TOa
Only one device can be active for dehumidification.
If a dedicated dehumidifier is active this will be used
instead of the heat pump heating/cooling coil.
If gas furnace is active. Fan
controlled by furnace only.
Equipment switch by outside air temperature
(only one can be active for heating). If gas furnce
is used for heating, the outer air devices are only
allowed to run when gas furnace is active.
6
2-stage heat pump, 2-stage
electric heating and outside
air damper (optional) control
HvacFnct19z
Hcl
2 stages
(El)
Fan
HCcl
2 stages
TR AQualR HuRelRPscDet
HMI
21
°C
X X X
X
X
X
OpMod
Swi UCont CdnMon
2x 2x 2x 2x 2x 2x
TRBltn
PscDet
Bltn TchDet Bltn HuRelRBltnPrxDet
Bltn
TOa
7
Conventional heating
application with 1-stage gas
heating
HvacFnct19z
Hcl
1 stage
(Gas)
Fan
DmpOa
Dhum
Hum
HumFrsd DhumFrsd
TR AQualR HuRelRPscDet
HMI
21
°C
X X X
X
X
X
OpMod
Swi UCont CdnMon
2x 2x 2x 2x 2x 2x
TRBltnPscDet
Bltn TchDet Bltn HuRelRBltnPrxDet Bltn
TOa
Only controlled by gas furnace
directively
Work only when gas furnace is active
8
Conventional cooling with 1-
stage DX cooling and outside
air damper (optional) control
application
HvacFnct19z
Fan
Ccl
1 stage
DmpOa
Dhum
Hum
HumFrsd DhumFrsd
TR AQualR HuRelRPscDet
HMI
21
°C
X X X
X
X
X
OpMod
Swi UCont CdnMon
2x 2x 2x 2x 2x 2x
TRBltnPscDet
Bltn TchDet Bltn HuRelRBltnPrxDet Bltn
TOa
.
Only one device can be active for dehumidification. If a dedicated
dehumidifier is active, this will be used instead of cooling coil.

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Issued by
Siemens Switzerland Ltd
Building Technologies Division
International Headquarters
Gubelstrasse 22
CH-6301 Zug
Tel. [phone]
www.siemens.com/buildingtechnologies
© Siemens Switzerland Ltd, 2017
Technical specifications and availability subject to change without notice.
Document ID
A6V10807603_a
Edition
2017-07-18
Dimensions