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Siemens RDG200KN Basic Documentation
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Siemens RDG200KN Basic Documentation

Room thermostats with knx communications
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RDG200KN & RDG260KN
Room thermostats with KNX communications
Basic Documentation
A6V11545892_en--_a
Smart Infrastructure
2020-11-16

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Summary of Contents for Siemens RDG200KN

  • Page 1 RDG200KN & RDG260KN Room thermostats with KNX communications Basic Documentation A6V11545892_en--_a Smart Infrastructure 2020-11-16...

  • Page 2: Table Of Contents

    Applications for fan coil systems ..........38 4.4.2 Applications for universal systems ..........39 4.4.3 Application for heat pump systems ..........40 Power supply selection for RDG200KN ............41 Additional functions..................42 4.6.1 Sensors and changeover functions ..........43 4.6.2 Presence detector ...............
  • Page 3 4.6.7 Preventive operation ..............55 4.6.8 NFC communication..............55 Control sequences ..................56 4.7.1 Sequence overview (setting via P001) .........56 4.7.2 Application mode ................57 4.7.3 2-pipe fan coil unit ...............59 4.7.4 2-pipe fan coil unit with electric heater .........60 4.7.5 2-pipe fan coil unit with radiator or floor heating ......62 4.7.6 2-pipe/2-stage heating or cooling ..........64 4.7.7...
  • Page 4 5.2.4 Operation and monitoring with OZW772 ........127 Connection ..................128 Connection terminals ................128 Connection diagrams ................129 Application examples ................132 6.3.1 Humidity control ................ 132 6.3.2 Relay functions ................. 135 6.3.3 Swap function and/or fan in the 2nd stage ......... 137 Technical data ..................

  • Page 5: About This Document

    Update ACS version info · 1.2 Reference documents Subject Ref. Document title Document number Room thermostats with KNX Mounting instructions (RDG200KN) A6V11546008 communications, RDG2..KN Mounting instructions (RDG260KN) A6V11844861 Operating Instruction A6V11545973 Data sheet A6V11545853 KNX manual Handbook for Home and Building Control –...

  • Page 6: Before You Start

    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.

  • Page 7: Document User/Request To The Reader

    Target audience, prerequisites 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.

  • Page 8: Overview

    Product no. Stock no. Number of control outputs voltage sensor 3-speed DC On/Off PWM 3-pos DC On/Off Humidity, (3-wire) temperature RDG200KN S55770-T409 AC 24 V or ✓ ✓ ‒ ✓ AC 230 V RDG260KN S55770-T412 AC 24 V or ✓ ✓ ‒...
  • Page 9 Siemens smartphone application PCT Go for Android) ● Reloading factory settings for commissioning and control parameters ● 1-speed, 3-speed or DC 0...10 V fan control on RDG200KN and RDG260KN (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.

  • Page 10: Accessories

    Overview Accessories ● Control of 6-port ball valve via KNX S-Mode objects (RDG200KN and RDG260KN) ● Flow limitation function for PICV in heating mode (RDG260KN) Inputs/outputs ● 3 multifunctional inputs selectable for: – Window contact switches operating mode to Protection –...

  • Page 11: Equipment Combinations

    Overview Equipment combinations 2.4 Equipment combinations Type of unit Product no. Datasheet Cable temperature or changeover QAH11.1 1840 sensor, cable length 2.5 m NTC (3 kΩ at 25 °C) Cable temperature sensor PVC 2 m, QPA22 1831 LG-Ni1000 Room temperature sensor NTC QAA32 1747 (3 kΩ...
  • Page 12 Overview Equipment combinations On/Off and PWM actuators Product Datasheet Type of unit Thermal actuator (for radiator valves) AC 230 V, STA23.. 4884 Thermal actuator (for radiator valves) AC 24 V, STA73.. 4884 Thermal actuator AC 230 V (for small valves STP23..
  • Page 13 For more information about parallel operation and the max. number of actuators Note: 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 RDG200KN (AC 230 V): ● 6 SS..31.. actuators (3-position) ●...

  • Page 14: Integration Via Knx Bus

    ● ETS5 or higher versions ● Siemens smartphone application PCT Go for Android Synco 700 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.
  • Page 15 Gamma Instabus For lighting control and other room electrical applications Desigo and third-party The RDG2..KN thermostats can be integrated into the Siemens building systems automation and control systems (BACS) Desigo or into third-party systems. Either S-Mode (group addressing) or individual addressing can be used for integration.

  • Page 16: Notes

    Notes Mounting and installation 3 Notes 3.1 Mounting and installation Mounting ● The devices are suitable for wall mounting. ● Recommended height: 1.5 m above the floor. ● Do not mount the devices in recesses, shelves, behind curtains or doors, or above or near heat sources.

  • Page 17: Commissioning

    If all DIP switches are Off, NO APPL displays, indicating that application commissioning via a tool is required. Commissioning via The Siemens smartphone application Product Commissioning Tool (PCT Go) for Siemens smartphone Android is a commissioning tool that allows user to: application PCT Go for ●...
  • Page 18 PROG. Programming mode remains active until thermostat identification is complete. Assign KNX device Assign device address (P900) via HMI, ACS, ETS or Siemens smartphone address application PCT Go for Android. Set the device address to 255 to deactivate the communication (no exchange of process data).

  • Page 19: Operation

    Notes Operation 3.3 Operation The room thermostat consists of two parts: ● Plastic housing with electronics, operating elements and room temperature sensor ● Mounting plate with the screw terminals The housing engages in the mounting plate and is secured with 2 screws. Layout Standard Hospitality...
  • Page 20 Notes Operation User action Effect, description Press left button while "Operating Activate "Extend Comfort mode" mode" via bus is Economy (for details, see Different ways to influence operating mode [➙ 27]). Keep left button pressed and turn rotary Activate timer "Extend knob clockwise/counter-clockwise presence"/"Extend absence"...

  • Page 21: Remote Operation

    Siemens’ portfolio undergoes continuous development to make it more secure. Siemens strongly recommends that updates are applied as soon as they are available and that the latest versions are used. Use of versions that are no longer supported, and failure to apply the latest updates may increase your exposure to cyber threats.

  • Page 22: Functions

    Functions Temperature control 4 Functions 4.1 Temperature control General note: Setting control parameters (P001 etc. mentioned throughout the document), see Parameters Control parameters [➙ 108]. The thermostat acquires the room temperature via built-in sensor, external room Temperature control temperature sensor (LG-Ni1000 or NTC 3k), external return air temperature sensor (LG-Ni1000 or NTC 3k) or via KNX (S-Mode or LTE-Mode), and maintains the setpoint by delivering actuator control commands to heating equipment, cooling equipment, or both.

  • Page 23: Operating Modes

    Functions Operating modes When an application program is downloaded to the Synco devices via ETS, the Note correct group addresses must also be downloaded to display the time of day on the thermostat (see Synco Knowledge Base - KB771). 4.2 Operating modes The thermostat operating mode can be influenced in different ways (see Different ways to influence operating mode [➙...

  • Page 24: Different Ways To Influence Operating Mode

    Functions Operating modes 4.2.1 Different ways to influence operating mode Source for change of Different interventions can influence the operating mode. operating mode The source of the actual room operating mode state can be monitored using the "Cause" diagnostic data point in the ACS tool or web server OZW772. Source Description Value of data point...
  • Page 25 Functions Operating modes Priority Description Remark ④ Presence detector ● Standard presence mode: If a room is occupied, the operating mode changes to Comfort. This overrides the operating mode on the thermostat. Unoccupied rooms set back the thermostat to the previous operating mode. ●...
  • Page 26 Functions Operating modes If the time schedule sends Pre-Comfort mode, the mode is changed either to Pre-Comfort via bus Economy (factory setting) or Comfort (selectable via P910). Behavior when bus sends No intervention is possible by the user, if Protection mode is set by the time Protection schedule.
  • Page 27 Functions Operating modes The operating mode can be changed to Comfort or Economy based on room occupancy (room occupied or unoccupied, via presence detector or keycard). For details, see Presence detector [➙ 45] Presence detector Temporary timer to extend Comfort mode can be temporarily extended (e.g., working after business hours or Comfort mode on weekends) when the thermostat is in Economy mode.
  • Page 28 Functions Operating modes Function if no time schedule is received via bus User profile for Operating Mode Function Operating Operating operating mode mode button mode during mode at the (selected via P002) when function end of activating function function Comfort Extension Comfort Protection...

  • Page 29: Communication Examples

    Functions Operating modes 4.2.2 Communication examples The following examples show 3 typical applications for a central time schedule together with local control of the room operating mode. The room operating mode in rooms 1…3 of a building is determined by the time schedule.
  • Page 30 Functions Operating modes Example 2 Interaction of user operation (operating mode button) and central time schedule In Room 2, the window is opened briefly, once in the morning and once in the late afternoon (1). Only the opening in the morning directly influences actual room operating mode. With the operating mode button, the operating mode can be changed between OFF and Auto or to temporary Comfort extension.
  • Page 31 Functions Operating modes Example 3 Application for "Window contact", "Presence detector" and “Central time schedule” In Room 3, the time schedule is between 13:00 and 17:00. ● In the morning, as soon as presence is detected, the operating mode switches to Comfort (1) ●...

  • Page 32: Room Temperature Setpoints

    The factory setting for the Comfort basic setpoint is 21 °C and can be changed in the thermostat’s EEPROM via P011, bus with communication object "Comfort basic setpoint" or Siemens smartphone application PCT Go for Android. The last option selected is always used.
  • Page 33 Functions Room temperature setpoints Setpoint energy saving ● This allows users to limit the setpoint setting range for heating and cooling concept (P010 = 2) independently. ● The setpoint limits for heating can be set via P013 (Comfort setpoint minimum) and P014 (Comfort setpoint maximum heating).

  • Page 34: Setting And Adjusting Setpoints

    ● KNX tool Comfort basic setpoint ● Central control unit Comfort setpoint ● Siemens smartphone application PCT Go for Android Economy heating setpoint The thermostat saves the setpoints to: Economy cooling setpoint ● EEPROM in the form of parameters ●...
  • Page 35 Functions Room temperature setpoints Other functions: ● If current humidity setpoint is not suitable for room humidity, setpoint shift is activated via humidity control strategy (P451). Cooling setpoint tracking In cooling mode, a large difference between outside and indoor temperatures can depending on outside create discomfort and waste energy.
  • Page 36 Functions Room temperature setpoints ● Local and central shifts are added up ● Applies only to Comfort and Economy setpoints; Protection setpoints are not shifted centrally ● The current setpoint heating and cooling is limited by the Protection setpoint. If the Protection setpoint is Off, both the minimum 5 °C and maximum 40 °C are used ●...

  • Page 37: Application Overview

    Remote configuration, via commissioning tool (factory setting) ON = ● Synco ACS DIP NO.: 1…5 ● ● Commissioning via Siemens smartphone application PCT OFF = Go for Android DIP NO.: 1…5 RDG200KN RDG260KN Application Application Fan coil fan speed...

  • Page 38: Applications For Fan Coil Systems

    2-pipe fan coil unit ● 2-pipe fan coil unit ● 2-pipe fan coil unit with electric heater with radiator/floor heating Using RDG200KN, RDG260KN Using RDG200KN, RDG260KN Using RDG200KN, RDG260KN ● 2-pipe/2-stage fan ● 4-pipe fan coil unit ● 4-pipe fan coil unit...

  • Page 39: Applications For Universal Systems

    ● Chilled/heated ● Chilled/ ● Chilled/heated ceiling heated ceiling ceiling and and electric radiator/floor heater heating Using RDG200KN, RDG260KN Using RDG200KN, RDG260KN Using RDG200KN, RDG260KN ● 2-stage ● Chilled ceiling ● Chilled and chilled/heated and radiator heated ceiling ceiling control with 6-...

  • Page 40: Application For Heat Pump Systems

    Applications, DIP setting, control outputs ● Heated or cooled with ● Heated or cooled with compressors compressors with electric heater Using RDG200KN, RDG260KN Using RDG200KN, RDG260KN ● Heated and cooled with ● 2-stage heated or cooled compressors with compressors Using RDG200KN, RDG260KN...

  • Page 41: Power Supply Selection For Rdg200Kn

    Power supply selection for RDG200KN 4.5 Power supply selection for RDG200KN The RDG200KN can be powered either on AC 230 V or AC 24 V. The desired power supply is selected via the power switch on the rear of the device.

  • Page 42: Additional Functions

    To ensure setpoint temperature is reached ✓ ✓ during heating ● Avoid damage from moisture (P363, P364) To prevent damages caused by moisture ✓ ✓ NFC communication [➙ 55] ● NFC (P500) NFC communication via Siemens smartphone ✓ ✓ application 42 | 150 A6V11545892_en--_a...

  • Page 43: Sensors And Changeover Functions

    Functions Additional functions 4.6.1 Sensors and changeover functions Heating/cooling The heating/cooling changeover information is received via bus. This is only changeover via bus (KNX) possible if the control sequence is set to automatic heating/cooling changeover (P001 = 2) and no local input (X1, X2, U1) is assigned to this function. In required information is unavailable (e.g., due to data communication issues, power failure, etc.), the thermostat operates in the last valid room operating mode (heating or cooling).
  • Page 44 Functions Additional functions When using an external switch for changeover, the operating action is configured Note via P150, P153 or P155 = 2. P151 (X1), P154 (X2) or P156 (U1) = 0 P151 (X1), P154 (X2) or P156 (U1) = 1 (default, normally open) (Normally close) Contact open...

  • Page 45: Presence Detector

    Functions Additional functions 4.6.2 Presence detector The operating mode can be changed to Comfort or Economy mode based on room occupancy (room occupied or unoccupied, via presence detector or keycard). Standard presence mode The presence detector input switches the operating mode to Comfort when the (Input: P150 / P153 / room is occupied and switches back to the previous operating mode when the P155 = 10)

  • Page 46: Output Functions

    Functions Additional functions 4.6.3 Output functions Purge function (P251) The changeover sensor ensures changeover between heating and cooling mode based on the acquired water temperature. We recommend activating the Purge function (P251) with 2-port valves. This function ensures correct acquisition of the medium temperature even if the 2-port valve is closed for an extended period of time.
  • Page 47 Functions Additional functions Qx relay switching The following functions allow the control of external equipment connected to the function (P400, P401, Q1, Q2 and Q3 relay outputs: P402) Function description P40X = No function Switching off external equipment when the thermostat is in Protection mode Switching on external equipment during…...
  • Page 48 Functions Additional functions ● To energize the output during heating/cooling demand, set the parameter to 2. ● To energize the output during heating demand, set the parameter to 3. ● To energize the output during cooling demand, set the parameter to 4. For application examples, see Relay functions [➙...

  • Page 49: Monitoring And Limitation Functions

    P064: maximum supply air temperature). Note ● This function is only active in Comfort mode with: – Valve output type is 3-position (RDG200KN) or DC 0...10 V (RDG260KN) – Electric heater is PWM / 3-position (RDG200KN) or DC 0...10 V (RDG260KN) ●...
  • Page 50 Functions Additional functions Flow limitation function for Set different limits to the flow in both sequences, heating and cooling to balance combi valve (PICV) (P256, heating and cooling systems and avoid hydraulic problems caused by the different RDG260KN) flow rates. Cooling typically requires a higher flow rate than heating, and the combi valve (PICV) is mechanically and manually set to the cooling flow limit.

  • Page 51: User Operation / Indication

    Functions Additional functions 4.6.5 User operation / Indication Button lock (P028) If the "Button lock" function is enabled by P028, lock or unlock them by pressing the right button for 3 seconds. If "Auto lock" is configured, the thermostat automatically locks the buttons 10 seconds after the last adjustment.

  • Page 52: Humidity

    Functions Additional functions 4.6.6 Humidity Humidity control (P007, Humidity control limits humidity in the room according to the selected setpoint P450) (low/high) by shifting the temperature setpoint, or by enabling outputs to release the external equipment as needed, e.g., the dehumidifier or humidifier. Humidity control is active in Comfort mode when P450 is set to 1.
  • Page 53 Functions Additional functions The maximum temperature shift setpoint value is reached at setpoint humidity high Note (P024) +10%. The contact for the dehumidifier is released at setpoint humidity +15%. Applications with a DC 0...10 V fan: Dehumidification ● Enable the function to control the external dehumidifier directly via relay output by setting P400 (output Q1), P401 (output Q2) or P402 (output Q3) to 7.
  • Page 54 Functions Additional functions The positive values of P461 (0.5…3.0 K) are used for heating and cooling, or P461 > 0 K heating in a humid cold environment. For heating and cooling, both temperature setpoints (heating and cooling) are shifted in parallel (i.e., dead zone remains unchanged). For heating and cooling applications, the value of the dead zone (P055) must be Note bigger than the maximum shifting temperature setpoint (P461), to avoid...

  • Page 55: Preventive Operation

    10 s. P500 enables/disables NFC communication locally or via tool (ETS, ACS or Siemens smartphone application PCT Go for Android). When disabled (default is enabled), the application cannot read or write the thermostat and message “NFC communication is disabled on the thermostat.” is displayed.

  • Page 56: Control Sequences

    Functions Control sequences 4.7 Control sequences 4.7.1 Sequence overview (setting via P001) The main control sequence (water coil sequence of the fan coil unit) can be set via P001. The following sequences can be activated in the thermostats (with or without auxiliary heating).

  • Page 57: Application Mode

    Functions Control sequences 4.7.2 Application mode The behavior of the thermostat can be influenced via building automation and control system (BACS) and bus using command "Application mode". Cooling, heating or both can be enabled or disabled using this signal. Application Application mode mode is supported in LTE-Mode and S-Mode.
  • Page 58 Functions Control sequences Application mode (via State Control sequence state bus) changeover/continuous (ACS diagnostic value) heating or cooling Auto (0) Heating Heating Cooling Cooling Heat (1), (2), (8) Heating Heating Cooling Heating Cool (3), (5) Heating Cooling Cooling Cooling Night purge (4), Heating Heating Fan only (9)

  • Page 59: 2-Pipe Fan Coil Unit

    Functions Control sequences 4.7.3 2-pipe fan coil unit In 2-pipe applications, the thermostat controls a valve in heating/cooling mode with changeover (automatically or manually), heating only, or cooling only (factory setting, P001 = 1). On/Off control The diagrams below show the control sequence for On/Off control. Control sequence Heating mode Cooling mode...

  • Page 60: 2-Pipe Fan Coil Unit With Electric Heater

    With a DC 0...10 V fan, On/Off control for the electric heater can be selected by setting P203 = 4. The electric heater must be connected to outputs Q2 DC 0...10 V fan (RDG260KN), Y2 (RDG200KN). ● The electric heater starts with a delay of 15 seconds, to ensure the fan supplies sufficient air flow to dissipate the heat (also applies to applications with DC control of the electric heater).
  • Page 61 Functions Control sequences In this case, an electric heater is connected directly to outputs Q2 (RDG260KN), and the current heats up the relay contact. This falsifies the internal temperature sensor reading. The thermostat compensates the temperature, if the rated power of the electric heating is entered at P217.

  • Page 62: 2-Pipe Fan Coil Unit With Radiator Or Floor Heating

    Functions Control sequences 4.7.5 2-pipe fan coil unit with radiator or floor heating Heating or cooling with In 2-pipe applications with radiator, the thermostat controls a valve in radiator or floor heating heating/cooling mode with changeover, heating only, or cooling only plus a radiator valve.
  • Page 63 Functions Control sequences Modulating control: The diagrams below show the control sequence for modulating PI control. 3-position, PWM or DC 0...10 V Heating mode Cooling mode T[°C] Room temperature Proportional band "Heating" (P050) Room temperature setpoint Proportional band "Cooling" (P052) Control command "Valve"...

  • Page 64: 2-Pipe/2-Stage Heating Or Cooling

    Functions Control sequences 4.7.6 2-pipe/2-stage heating or cooling In 2-stage applications, the thermostat controls 2 valves or 2-stage compressors in 2-stage heating or cooling heating or cooling mode or changeover (automatically or manually). "Cooling only" is factory-set (P001 = 1). Heating mode In heating mode, the 1 stage is activated if the acquired temperature is below the...
  • Page 65 Functions Control sequences T[°C] Room temperature Switching differential "Heating" (P051) Room temperature setpoint Switching differential "Cooling" YHC1 Control command "Stage 1" (P053) YHC2 Control command "Stage 2" Setpoint differential (P056) Modulating control: The diagrams below show the control sequence for modulating PI control. 3-position, PWM or DC 0…10 V Heating mode (P001 = 0)

  • Page 66: 4-Pipe Fan Coil Unit

    Functions Control sequences 4.7.7 4-pipe fan coil unit In 4-pipe applications, the thermostat controls 2 valves in heating and cooling Heating and cooling mode, heating/cooling mode by manual selection, or heating and cooling mode with changeover. Heating and cooling mode (P001 = 4) is factory-set. The heating or cooling output can be released via operating mode button if P001 is 4-pipe application with manual changeover...
  • Page 67 Functions Control sequences Heating mode with manual selection Cooling mode with manual selection (P001 = 3) or (P001 = 3) or for energy saving (P010 = 2 & P014) in for energy saving (P010 = 2 & P015) in heating sequence cooling sequence Note The diagrams only show the PI thermostat’s proportional part.
  • Page 68 Functions Control sequences 4.7.7.1 4-pipe application with PICV and 6-port control ball valve as changeover (RDG260KN) In a 4-pipe fan coil application with DC 0...10 V fan control, the RDG260KN controls a combi valve (PICV) in combination with a 6-port ball valve as changeover.

  • Page 69: 4-Pipe Fan Coil Unit With Electric Heater

    Functions Control sequences 4.7.8 4-pipe fan coil unit with electric heater Heating and cooling with In 4-pipe applications with electric heater, the thermostat controls 2 valves in auxiliary heater heating and cooling mode by manual selection, heating only, or cooling only plus an auxiliary electric heater.
  • Page 70 Functions Control sequences Modulating control: The diagrams below show the control sequence for modulating PI control. 3-position or PWM Heating mode with manual selection Cooling mode with manual selection (P001 = 3) (P001 = 3) Heating and cooling (P001 = 4) T[°C] Room temperature Room temperature...

  • Page 71: Chilled/Heated Ceiling And Radiator Applications

    Functions Control sequences 4.7.9 Chilled/heated ceiling and radiator applications For chilled/heated ceiling and radiator applications ● Set the corresponding basic application see Application overview [➙ 37]. ● Disable the fan (P350) The following applications are available: Application for Basic application Section Sequences chilled/heated...
  • Page 72 Functions Control sequences 4.7.9.1 Chilled/heated ceiling with 6-port control ball valve (RDG260KN) The RDG260KN is able to control a 6-port control ball valve for a chilled and heated ceiling application. This application is available, if the thermostats are set as 4-pipe with 6-port ball valve applications (DIP4 = ON, see Applications for universal systems [➙...
  • Page 73 Functions Control sequences 4.7.9.2 Chilled/heated ceiling with pressure independent combi valve (PICV) and 6-port ball valve for changeover (RDG260KN) The RDG260KN is able to control a PICV for a chilled and heated ceiling application together with a 6-port ball valve for changeover. This application is only available, if the thermostat is set to a 4-pipe with 6-port ball valve as changeover and PICV application (DIP1 &...

  • Page 74: Compressor Applications

    Functions Control sequences When control sequences change, the thermostat closes the combi valve and releases the corresponding relay to operate the ball valve. A delay of 120 seconds is needed before the combi valves can be operated by the thermostat. When the relay to ensure the ball valve is in the right H/C position, the control signal for the combi valve is released.

  • Page 75: Applications With External Aqr Sensor Or Qmx Room Operator Unit

    Functions Control sequences 4.7.11 Applications with external AQR sensor or QMX room operator unit The equipment combination is intended for commercial buildings, offices, schools, museums, shops, etc. Advantages of equipment combination AQR/QMX sensor LTE-Mode S-Mode Sensor can be installed in the optimal place for ✓...

  • Page 76: Setpoints And Sequences

    Functions Control sequences 4.7.12 Setpoints and sequences In changeover applications, the Comfort setpoints for heating and cooling 2-pipe applications sequence are the same (w). In 2-pipe applications with electric heater, the Comfort setpoint is either at the first heating sequence (in heating mode) or at the cooling sequence (in cooling mode). In 2-pipe applications with radiator, the Comfort setpoint is either at the radiator sequence (in heating mode) or at the cooling sequence (in cooling mode).
  • Page 77 Functions Control sequences In 4-pipe applications, the Comfort setpoint (w) is in the middle of the dead zone, 4-pipe applications between the heating and cooling sequences. The dead zone can be adjusted via P055. If manual changeover is selected, either the cooling sequence or the heating sequence is released.

  • Page 78: Control Outputs

    For switching differential (P051, P053, P054), see Control sequences [➙ 56]. On/Off control signal The valve receives the On command via control output Y1 or Y2 on RDG200KN, if: (3-wire) 1. The acquired room temperature is below the setpoint (for heating) or above the setpoint (for cooling), 2.
  • Page 79 Note The electric heater can be controlled via the On/Off control output (RDG260KN: Q2, RDG200KN: Y2 or Y3) by setting P203 or P204 to 4. For adaptive temperature compensation (P217: RDG260KN): see 2-pipe fan coil unit with electric heater [➙ 60], 4-pipe fan coil unit with electric heater [➙ 69].
  • Page 80 Functions Control outputs As initial setting, we suggest the following values, which can be modified within the described setting range as needed: ● Electric heater applications: 300 s (5 min) / range 30...60 s ● Electric radiator applications: 1200 s (20 min) / range 120...1800 s (30 min) ●...
  • Page 81 Functions Control outputs These 2 signals allow for controlling Siemens valves as well as DC 2…10 V valves by other suppliers. For the same application, RDG260KN can also provide an inverse signal DC 10…0 V or DC 10…2 V signal for inversed hydraulic connections on the valve.

  • Page 82: Control Output Configuration (Setting Via Dip Switches 7/8 Or Tool, And P201/P203/P204)

    Functions Control outputs 4.8.2 Control output configuration (setting via DIP switches 7/8 or tool, and P201/P203/P204) Overview Application Control outputs Product DC 0...10 V 3-speed/ Mod. On/Off On/Off Mod. PWM Mod. RDG…KN DC 0…10 V 3-pos. 1-speed (2-pos) (3-wire) (2-pos) 2-pipe ✓...
  • Page 83 Functions Control outputs RDG200KN The type of the control outputs (2- or 3-position) is set via DIP switches 7 and 8. Patterns of DIP switches 7 and 8: DIP NO.: 7…8 ➨ ON = , OFF = Y1/Y3 = 2-position (PWM)

  • Page 84: Fan Control

    Functions Fan control 4.9 Fan control In RDG200KN and RDG260KN, the available fan output signals are one On/Off 1- Overview fan outputs speed/3-speed fan or one modulating fan DC 0...10 V and control type can be selected via P351. The fan control signal (DC 0…10 V or 3-speed) is selected via DIP switch 6, local HMI (P351) or tool (ACS, ETS or Siemens smartphone application PCT Go for Android).
  • Page 85 Functions Fan control Fan control with For 3-speed fan control: modulating The individual switching points for each fan stage can be adjusted via heating/cooling control P353…P355. The fan speed switch off point is 20% below the switch on point. The (PWM, 3-pos or diagrams below show fan speed control for modulating PI control.
  • Page 86 Functions Fan control Fan control with On/Off In applications with On/Off control: heating/cooling control 1. The switching point for low fan speed is synchronized to the heating/cooling output. P353 (switching point fan speed low) is not relevant. 2. The maximum switching range of the fan (XpH /XpC ) is defined by the switching differential (SDH/SDC) via a reference table.
  • Page 87 Functions Fan control Fan speed III = Max. fan speed selectable via P359 (heating), P360 (cooling) Note: Manual fan settings do not influence control signals "Heating" and "Cooling". Note When heating with electric heater only, manual fan speed I is unavailable to guarantee the necessary minimum air flow for the electric heater and to avoid overheating.
  • Page 88 Functions Fan control ● The output for the 1 stage (YHC1) in heating mode is also the 1 stage in Notes cooling ● This function is available for DC/3-speed/1-speed fans We recommend enabling the swap function on applications with fan coil units and Example 2 floor heating/cooling.
  • Page 89 Functions Fan control Combination 1 stage stage Fan type Fan synchro Fan behavior signal signal On/off XpH/XpC, sequence P/PI control sequence XpH/XpC, On/off P/PI control /XpC On/off sequence P-control sequence XpH/XpC, 3-speed 1 P/PI control 3-speed 2 XpH/XpC, sequence P/PI control Fan operation can be limited to be active with cooling only or heating only, or even Fan operation as per heating/cooling mode, or...
  • Page 90 Functions Fan control ● Auto fan runs in the dead zone at low speed during cooling only (P029 = 2). During heating, the fan does not run in the dead zone. ● Auto or manual fan does not run in the dead zone (P029 = 3) ●...
  • Page 91 Functions Fan control Fan operation with combi Fan control is set to enable by default (P350 = 1), if the thermostat is set with valve PICV and a 6-port control sequence “H/C ceiling with PICV and 6-port ball valve as changeover”. For ball valve as changeover this application, where the combi valve PICV controls the flow rate and the 6-port ball valve works as changeover heating / cooling, fan control can:...

  • Page 92: Multifunctional Input, Digital Input

    Functions Multifunctional input, digital input 4.10 Multifunctional input, digital input The thermostat has 3 multifunctional inputs X1, X2 and U1. Input U1 will be configured as digital input in a future product version. An NTC type sensor like NTC 3k, a LG-Ni1000 (AI, analog input) or a switch (DI, digital input) can be connected to the input terminals.
  • Page 93 Functions Multifunctional input, digital input Input function Description Type X1/X2/U1 Monitor input (digital) Digital input to monitor the state of an external switch via bus U1, X1, X2 (Digital) Monitor input Sensor input to monitor the state of an external (temperature) sensor (e.g., NTC 3k) via bus.

  • Page 94: Handling System Faults

    Functions Handling system faults 4.11 Handling system faults If the room temperature exceeds or drops below the measuring range, i.e. above Temperature out of range 49 °C or below 0 °C, the limiting temperatures blink, e.g., 0 °C or 49 °C. In addition, the heating output is activated if the current setpoint is not set to Off, the thermostat is in heating mode and the temperature is below 0 °C.

  • Page 95: Lte-Mode

    Functions KNX communications 4.12.2 LTE-Mode LTE-Mode was specifically designed to simplify engineering. Unlike with S-Mode, individual connections (group addresses) need not be created in the tool. The devices autonomously establish connections. Definitions The following circumstances are predefined: ● Every device or subdevice is located within a zone ●...
  • Page 96 Functions KNX communications Geographical zone Zone where an RDG2..KN KNX room thermostat is physically located. Other room-specific devices may also be located in this zone. (space zone) Information exchanged in this zone is related specifically to the device like (Apartment . Room . Subzone) operating mode, setpoints, room temperature, etc.

  • Page 97: Example Of Heating And Cooling Demand Zones

    Functions KNX communications 4.12.4 Example of heating and cooling demand zones The building is equipped with Synco controls on the generation side and RDF../RDU../RDG.. room thermostats on the room side. Explanation relating to the In the case of a typical application, the individual RDF../RDG.. room thermostats illustration send their heat demand to the primary controller (in the above example to the RMH760).

  • Page 98: Send Heartbeat And Receive Timeout

    Functions KNX communications 4.12.5 Send heartbeat and receive timeout In a KNX network, S-Mode and LTE-Mode communication objects can be exchanged between individual devices. The "Receive timeout "defines the period of time within which all the communication objects requested from a device is received at least once.

  • Page 99: Fault And Alarms Function On Knx

    Functions KNX communications 4.12.8 Fault and alarms function on KNX A fault is sent on the bus in the event of a fault (e.g., digital fault input, dewpoint, communication configuration, etc.). An RDG2..KN room thermostat monitors the bus and sends a fault, if the fault has the highest alarm priority.

  • Page 100: Communication Objects (S-Mode)

    Functions Communication objects (S-Mode) 4.13 Communication objects (S-Mode) 4.13.1 Overview 100 | 150 A6V11545892_en--_a...
  • Page 101 Functions Communication objects (S-Mode) Object No. and name Thermostat Object No. and name 1 System time 4 Fault information 2 Date 5 Fault status (0 = Normal / 1 = Faulty) 3 Time of day 8 Room operating mode: Preselection 6 Fault transmission (0 = Enable / 1 = Disable) 7 Room operating mode: Preselection (receive) 17 Room operating mode: Status...

  • Page 102: Description Of Communication Objects

    Functions Communication objects (S-Mode) 4.13.2 Description of communication objects Object name Function Type/ Flags Object name Function Type/ Flags length length System time Time and date 19.001 Room operating Trigger 1.017 8 bytes 1 bit mode: Preselection - Auto System time for display on the room thermostat. See P009 (3 or 4) - Comfort - Economy Date...
  • Page 103 Functions Communication objects (S-Mode) Object name Function Type/ Flags Object name Function Type/ Flags length length Room temp: [P19] Temperature 9.001 Room temp: Temperature 9.001 Economy heating 2 bytes Comfort setpoint 2 bytes setpoint abs (receive) Communication object adjusts the Economy heating setpoint used Communication object shifts the setpoint (absolute) used by the by the thermostat (see Setting and adjusting setpoints [➙...
  • Page 104 Functions Communication objects (S-Mode) Object name Function Type/ Flags Object name Function Type/ Flags length length Extended comfort 1.011 Application mode HVAC control 20.105 mode status 1 bit mode 1 byte Indicates the status of Comfort mode extension. Auto (default) Heating and/or cooling External room Temperature...
  • Page 105 Functions Communication objects (S-Mode) Object name Function Type/ Flags Object name Function Type/ Flags length length Fan output 0…100 % 5.001 Heating, control 1.011 1 byte value status 1 bit Indicates the current fan speed as a value 0...100 %. Speed Fan output (physical KNX Indicates the control status of heating actuator of the first stage...
  • Page 106 Functions Communication objects (S-Mode) Object name Function Type/ Flags Object name Function Type/ Flags length length Hum. Control Inactive 20.115 Enable or disable Enable 1.003 mode Humidification 1 byte Leaf indication Disable 1 bit Dehumidification Indicates the mode of the humidity control function: Enables or disables the leaf (green or red) indication.

  • Page 107: Communication Objects (Lte-Mode)

    Functions Communication objects (LTE-Mode) 4.14 Communication objects (LTE-Mode) Geographical zone A.R.S (Time switch zone) Room operating mode: Time switch X.1.1/X.Y.1 Application mode Geographical zone Room operating mode: Preselection A.R.S X.Y.1 Room temperature Comfort setpoint Room humidity [% r.h.] Setpoint heating Setpoint cooling Fan speed Setpoint shift heating...

  • Page 108: Control Parameters

    4.15 Control parameters To optimize control performance, a number of control parameters can be readjusted on the thermostat via HMI, commissioning/operating tool, or Siemens smartphone application PCT Go for Android. These parameters can also be set during operation without opening the unit.

  • Page 109: Setting/Downloading Parameter Via Tool

    Functions Control parameters 4.15.2 Setting/downloading parameter via tool The control parameters can be adjusted via bus either by parameter download during commissioning or during normal operation with a tool like ACS. With the ACS tool, the parameters can be changed… ●...

  • Page 110: Commissioning Parameter Via Smartphone App Pct Go

    Functions Control parameters 4.15.3 Commissioning parameter via Smartphone app PCT Go The Siemens smartphone application Product Commissioning Tool (PCT Go) for Android is a commissioning tool to: ● Read and write thermostat parameters ● Set the application (e.g. 2-pipe) ●...

  • Page 111: Service Level Parameters

    Functions Control parameters 4.15.4 Service level parameters Name Service level ✓ ✓ P002 P001 Control sequence 2-pipe: 0 = Heating only 1 = Cooling 1 = Cooling only only 2 = H/C changeover auto 3 = H/C changeover manual 4-pipe: 4 = Heating and cooling 4 = Heating and cooling...
  • Page 112 Functions Control parameters Name Service level ✓ ✓ P450 P026 Humidity setpoint low OFF (0), 20…90 % or P024 ✓ ✓ Appl P027 Electric heater when cooling ON: Enabled OFF: Disabled ✓ ✓ ‒ P028 Keypad 0 = Unlocked 1 = Auto lock 2 = Manual lock 3 = Lock the operating mode 4 = Lock the Setpoint shift...

  • Page 113: Expert Level Parameters With Diagnostics And Test

    Functions Control parameters 4.15.5 Expert level parameters with diagnostics and test Name Expert level Control settings P050 Heat P-band Xp 0.5…6 K ✓ ✓ ‒ P051 Switching differential heating 0.5…6 K ✓ ✓ ‒ P052 Cool P-band Xp P053 Switching differential cooling P054 Radiator P-band Xp/switching 0.5…6 K...
  • Page 114 Note: for 2-/4-pipe 2-stage 2 = 2 sequence heating, 1 sequence application cooling 3 = 1 sequence heating, 2 sequence cooling P201 RDG20xKN: Output Y1 (and Y3 for RDG200KN: 1 = 3-position ✓ ‒ ‒ 3-pos) RDG26xKN: Output Y10 (DC) or Q1 RDG260KN: 2 = On/Off 3 wires ✓...
  • Page 115 Functions Control parameters Name Expert level P206 PWM algorithm cycle Y1 1200 s 20…3600 s ✓ ‒ P206: P201 P207 PWM algorithm cycle Y2 P207: P208 PWM algorithm cycle Y3 P203 P208: P204 P210 On time minimum PWM output 1…20 % ✓...
  • Page 116 Functions Control parameters Name Expert level P365 Fan start delay 0...360 s ✓ ✓ P350 P366 Fan start, minimum hot water 30 °C OFF,5…60 °C ✓ ✓ P350 temperature Input Relay functions P400 Output Q1 function 0 = No function ✓...
  • Page 117 Functions Control parameters Diagnostics and test Parameter Name Range Dependencies Diagnostics and test Application number 0 = (No application) ‒ 1 = 2-pipe 2 = 2-pipe with electric heater 3 = 2-pipe with radiator 4 = 4-pipe 5 = 2-stage heating or cooling (2-pipe) 6 = 4-pipe with electric heater 7 = 2-stage heating and cooling (4-pipe) 8 = 4-pipe:6-port H/C (no fan)

  • Page 118: Supported Knx Tools

    Supported KNX tools 5 Supported KNX tools 5.1 ETS ETS is an engineering tool to fully commission RDG2..KN room thermostats. ETS can implement the following functions: ● Define and download the physical address ● Define and download the application (plant type, control sequence) ●...

  • Page 119: Setting Parameters In Ets

    Supported KNX tools 5.1.1 Setting parameters in ETS 1 Open the project in ETS and select a device. 2 Click the Parameters tab, and adjust the control parameters as follows: A6V11545892_en--_a 119 | 150...
  • Page 120 Supported KNX tools 3 Plant type (application), Control Sequence and other control parameters ([Pxx] description) can be downloaded. For more details on control parameters, see Control parameters [➙ 108]. ● ETS version 4 or higher is used to assign communication objects to group Notes addresses (S-Mode) ●...

  • Page 121: Acs Tool

    Supported KNX tools ACS tool Humidity parameters 1 Select Room relative humidity in the left pane to display humidity parameters. 2 Adjust the parameters as needed. See Control parameters [➙ 108] for more details on control parameters. 3 Select as group object in checkbox Humidity setpoints, to display the S- Mode humidity setpoint in the Group Objects tab as follows: 4 Select Receive in checkbox Room relative humidity.

  • Page 122: Setting Parameters In Acs

    Supported KNX tools ACS tool 5.2.1 Setting parameters in ACS In the ACS program, select Plant ➙ Open to open the plant. To open the parameter settings, select Applications ➙ Plant engineering. The application and control parameters can be adjusted and downloaded. Line no.

  • Page 123: Operation And Monitoring With Acs

    Supported KNX tools ACS tool 5.2.2 Operation and monitoring with ACS In the ACS program, select Plant ➙ Open to open the plant. To open monitoring and operation, select Applications ➙ Plant operation. Parameter settings in ACS The ACS tool supports parameter settings even during normal operation. To change a control parameter, double-click the parameter in Standard popcard for the settings.
  • Page 124 Supported KNX tools ACS tool The ACS tool offers plant diagrams for easy monitoring and operation of the Plant diagram in ACS thermostat. To start the application, select Applications ➙ Plant operation ➙ Standard diagram. The ACS tool provides standard plant diagrams for RDG2..KN room thermostats, depending on the following configuration: Plant type Application...
  • Page 125 Supported KNX tools ACS tool Plant type Application Application configuration configuration 2-pipe with 2-pipe fan coil unit with electric heater Single-stage with electric heater electric – Control sequence: No impact (P001 = any) – Control sequence: No impact heater (P001 = any) –...
  • Page 126 Supported KNX tools ACS tool Plant type Application Application configuration configuration 2-pipe/2- 2-pipe/2-stage fan coil unit 2-pipe/2-stage stage – Control sequence: No impact (P001 = any) – Control sequence: No impact heating or (P001 = any) – Fan operation: Disabled (P350 = 0) cooling –...

  • Page 127: Operation And Monitoring With Ozw772

    Supported KNX tools ACS tool 5.2.4 Operation and monitoring with OZW772 HomeControl app for plant control The OZW772 web server allows users to operate a Synco HVAC system from a remote location – via a PC or from a smart phone using the HomeControl app. The start page displays the most important data points.

  • Page 128: Connection

    Connection Connection terminals 6 Connection 6.1 Connection terminals RDG200KN L, N Operating voltage AC 230 V / AC 24 V X1, X2 Multifunctional input for temperature sensor (NTC 3k or LG- Ni1000) or potential-free switch (function can be selected via...

  • Page 129: Connection Diagrams

    3-pos 2-pos ✓ ✓ ✓ ✓ (PWM) (PWM) Room thermostat RDG200KN 1-speed or 3-speed fan, DC 0…10 V fan S1, S2, S3 Switch (keycard, window contact, presence B1, B2, B3 Temperature sensor (return air temperature, detector etc.) external room temperature, changeover sensor, etc.)
  • Page 130 Connection Connection diagrams RDG260KN DC 0…10 V fan 1-speed/3-speed fan Application 2-pipe Terminals Control outputs: ✓ ✓ ✓ ✓ On/Off ✓ ✓ ✓ ✓ 2-pipe with radiator 4-pipe YHC1 YHC2 2-pipe/2-stage Terminals Control outputs: ✓ ✓ ✓ ✓ On/Off ✓ ✓...
  • Page 131 Connection Connection diagrams RDG260KN Chilled/heated ceiling with 6-port control ball valve 4-pipe with 6-port ball valve as changeover and PICV Application Room thermostat RDG260KN 6-port modulating control actuator S1, S2, S3 Switch (keycard, window contact, presence PICV control valve detector etc.) B1, B2, B3 Temperature sensor (return air temperature, external room temperature, changeover sensor, etc.) KNX data -...

  • Page 132: Application Examples

    Connection Application examples 6.3 Application examples The examples are described for RDG260KN, but they also apply to RDG200KN. Control output (P201, P204) and terminals for the valves (Y1, Y2) need to be adapted accordingly. 6.3.1 Humidity control Note: In the following examples, P461 is configured based on the connected type of equipment.
  • Page 133 Connection Application examples Example 2: 2-pipe fan coil application for dehumidification, with DC 0...10 V fan and DC valve Dehumidifier, (without temperature setpoint shifting): DC 0...10 V fan + valve, No shifting setpoint Commissioning Outputs used ● P351 = 3 ●...
  • Page 134 Connection Application examples Example 4: 2-pipe fan coil application for dehumidification, with temperature setpoint shifting, Dehumidifier + dehumidifier contact, DC 0...10 V fan and DC valve, humidification is controlled by humidifier/DC 0...10 V fan release contact: Commissioning Outputs used ● P351 = 3 ●...

  • Page 135: Relay Functions

    Connection Application examples 6.3.2 Relay functions Example 1: 2-pipe fan coil application, fan coil unit off during Protection mode. Switching off the fan coil unit Commissioning Outputs used ● P351 = 3 ● DC 0...10 V fan (or DIP6 = OFF) ●...
  • Page 136 Connection Application examples Example 3: Compressor application, with reversing valve (heating/cooling) and DC 0...10 V Compressor and fan: reversing valve Commissioning Outputs used ● Application 4-pipe ● DC 0...10 V ● Control output P201 = 4 (On/Off) ● Reversing ● P351 = 3 valve (or DIP6 = OFF)

  • Page 137: Swap Function And/Or Fan In The 2Nd Stage

    Connection Application examples 6.3.3 Swap function and/or fan in the 2nd stage Example 1: 2-pipe fan coil application for floor heating/cooling (2-stage heating/cooling), fan Fan in the 2 stage runs only in the 2 stage: Commissioning Outputs used ● P350 = 4 (2 stage) ●...
  • Page 138 Connection Application examples Example 2: 2-pipe and 2-stage application with radiant heating/cooling panels, the fan only Swap and fan in the 2 operates with the fan coil unit: stage ● Heating sequence: 1 panel and 2 fan coil unit ● Cooling sequence: 1 fan coil unit and 2 panel...
  • Page 139 Connection Application examples Example 3: 2-pipe fan coil and 2-stage application with different types of equipment (On/Off Swap and fan in the 2 control outputs), the fan only operates if output V1 is energized. stage Commissioning Outputs used ● P350 = 5 (Heating ●...

  • Page 140: Technical Data

    Technical data 7 Technical data Power supply (RDG200KN) AC 24 V ±20 % or Operating voltage (L-N) AC 230 V +10/-15 % (selectable via slider) Frequency 50/60 Hz Power consumption 4 VA @ AC 24 V 7 VA @ AC 230 V ●...
  • Page 141 Technical data Power supply (RDG260KN) Operating voltage (G-G0) AC 24 V ±20 % DC 24 V: Make sure to connect G to + DC 24 V ±2 V and G0 to - Frequency 50/60 Hz Power consumption 4 VA @ AC 24 V No internal fuse! External preliminary protection with max.
  • Page 142 Technical data Multifunctional inputs Temperature range -20…70 °C Temperature sensor input Type LG-Ni1000 Temperature range -40…70 °C Digital input Operating action Selectable (NO/NC) Contact sensing DC 0…5 V, max. 5 mA Insulation against mains SELV KNX bus Interface type KNX, TP Uart 2 (electrically isolated) Bus current 5 mA Bus topology: See KNX manual ("Reference documentation")
  • Page 143 Technical data Operational data Humidity calibration range ±10 % Settings and display resolution Setpoint 0.5 °C Present temperature value displayed 0.5 °C Environmental conditions Storage IEC 60721-3-1 Climatic conditions Class 1K3 Temperature -25…65 °C Humidity < 95 % r.h. Transport IEC 60721-3-2 Climatic conditions Class 2K3...
  • Page 144 ● PWM (TPI) room thermostat, for use Class IV value 2 % with On/Off output heaters Environmental compatibility The product environmental declaration (RDG200KN: A5W00085404A RDG260KN: A5W00116569A ) contains data on environmentally compatible product design and assessments (RoHS compliance, materials composition, packaging, environmental benefit, disposal).
  • Page 145 Synco 700, 900 and RXB/RXL Basic documentation Desigo CM1Y9775 Desigo RXB integration – S- Mode CM1Y9776 Desigo RXB/RXL integration – individual addressing CM1Y9777 Third-party integration CM1Y9778 Synco integration CM1Y9779 Working with ETS *) The documents can be downloaded from https://hit.sbt.siemens.com. A6V11545892_en--_a 145 | 150...

  • Page 146: Dimensions

    Dimensions 8 Dimensions Dimensions in mm 146 | 150 A6V11545892_en--_a...

  • Page 147: Index

    Index Index External/return air temperature ......92 Numerics External/return air temperature sensor ....44 1-speed ............86 3-position control signal ........78 Fan in Auto mode ..........90 3-speed ............86 Fan kick ............89 6-port ball valve ..........74 Fan minimum on- time ........
  • Page 148 Index Manually select heating or cooling sequence ..56 Sensor input ............ 92 Minimum output ..........46 Setpoint Comfort mode ........76 Moisture ............55 Setpoint Economy mode ........76 Monitoring with ACS ........123 Setpoint high ........... 52 Monitoring with OZW772 ......... 127 Setpoint low ............
  • Page 150 Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug +41 58 724 2424 www.siemens.com/buildingtechnologies © Siemens Switzerland Ltd, 2020 Technical specifications and availability subject to change without notice. A6V11545892_en--_a...

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