Room controller for VAV systems RXC32.1 / RXC32.5
Contents
1. Y3 and Y4 LPHW reheater with motorised valve AC 24 V 3 position When Desigo RXC is integrated into a building automation and control system additional functions become available such as time scheduling central control of setpoints etc refer to the Desigo INSIGHT documentation for further information 2 14 Siemens RXC32 Room controller for VAV systems CA2N3845en_04 Building Technologies 16 01 2012 Types Type SSN Description RXC32 1 Room controller for VAV systems RXC32 5 55373 C116 RXZ30 1 Accessory Terminal covers Ordering When ordering please specify the quantity product name and type code The controllers will be delivered with basic application 00032 The RXZ30 1 terminal covers are supplied in packs of 1 pair and must be ordered separately Example 30 Room controllers for VAV systems RXC32 5 00032 30 Pairs of terminal covers RXZ30 1 Compatibility Mechanical design For operation of the RXC32 room controller a room unit from the QAX series may be used in conjunction with conventional momentary contact switches for lighting and blind control Alternatively the flexible room units QAX50 1 or QAX51 1 may be used See the RX hardware overview CA2N3804 for a summary of the available field devices Terminal covers The RXC32 controller consists of a housing base a housing cover and the printed circuit board with connection terminals The controller also has a tool2. 4 contains the relevant engineering information for the LONWORKS bus topology bus repeaters bus termination etc and for the selection and dimensions of connecting cables for the supply voltage and field devices See Connection diagrams for information on connecting field devices The controller operates with an AC 24 V supply voltage SELV PELV The supply cable must be protected with at least 10 A The controlled devices valves and damper actuators are supplied directly from the controller The maximum load on the outputs must not be exceeded see Technical data The power consumption of the connected devices must be taken into account when sizing the transformer e The simultaneous load on outputs Y3 Y6 must not exceed 24 VA e The maximum load on each output must not exceed 12 VA Equipment Y1 Y2 1 3 position motorised actuator GDB 1E 2VA Y3 Cooling 2 thermic valve actuators type STP72E 6W Y4 Heating 2 thermic valve actuators type STP72E 6W Simultaneous load 2 motorised actuators both ON continuously 4VA 2 thermic valve actuators 6 W 12 W 10 W 16 W The heating and cooling sequences are never operative simultaneously Therefore only the actuators for one of the two sequences need to be included when calculating the total load When cold thermic valve actuators have a consumption of approximately 6 W A maximum of two thermic actuators may be connected to any one Y output
3. 6 14 The controller can be mounted in any orientation as follows Rail mounting Surface mounting The housing base is designed for snap There are four drill holes for screw mounting on DIN rails type EN50022 mounting see Dimensions for drilling 35x7 5 can be released with a diagram The housing base is fitted screwdriver with raised supports Screws Max diameter 3 5 mm Siemens Building Technologies RXC32 Room controller for VAV systems CA2N3845en_04 16 01 2012 Connection flow sensor Commissioning When mounting note the following e Ensure adequate air circulation to dissipate heat generated during operation e Easy access is required for service personnel e Local installation regulations must be observed The mounting instructions and a drilling template are printed on the controller packaging e Avoid bends and constrictions when connecting the tubing e Connect the connection to the higher pressure side and the connection to the lower pressure side e The recommended tube length is in the range 700 mm 2 000 mm e When using an air filter install it on the high pressure side with the air flowing through the filter in the correct direction e Use an air filter to prevent the accumulation of dirt particle deposits on the sensor element especially when the extract air is contaminated see technical data Labeling Function test Notes The RXC32 control
4. 845A02_01 Measured value inputs for temperature or air quality sensors G 11 AC 24 V supply for sensor B1 12 Measured value input for sensor Ni1000 or DC 0 10 V M 13 Sensor ground Signal input for volt free contacts D1 14 Signal input GND 15 Signal input ground D2 16 Signal input GND 17 _ Signal input ground N C 18 Not connected Room unit CP 19 PPS2 ground CP 20 PPS2 data CLA 21 DataA CLB 22 DataB LONWorRKS Bus plug in CLB 23 DataB CLA 24 DataA Triac outputs Y1 34 AC 24 V 0 5 A switching output G 35 AC 24 V actuator supply Y2 36 AC 24 V 0 5 A switching output Y3 37 AC 24 V 0 5 A switching output G 38 AC 24 V actuator supply Y4 39 AC 24 V 0 5 A switching output G 40 AC 24 V actuator supply Air flow sensor P1 P2 Air flow sensor connectors Tool socket Standard RJ45 tool socket for LON devices 12345678 1 LON Data A CLA 5 Not used 2 LON Data B CLB 6 Not used z 3 Not used 7 PPS2 CP 8 4 Not used 8 PPS2 CP 10 14 Siemens RXC32 Room controller for VAV systems CA2N3845en_04 Building Technologies 16 01 2012 Connection diagrams Notes GO AC 24 V Y1 Y3 2 p 3 3 ce W W Y2 3 N1 RXC32 X1 Temperature sensor LG Ni 1000 D1 D2 Volt free contacts window switch occupancy sensor etc R1 QAX room unit Y1 Y3 2 AC 24 V 3 position damper actuator types GDB13 GLB13 Y3 Y4 AC 24 V thermic valv
5. SIEMENS 3945 Desigo RXC Room controller RXC32 1 RXC32 5 for VAV systems with LONMARK compatible bus communication The RXC32 controller is used for VAV room temperature control in individual rooms CA2N3845en_04 16 01 2012 Control of the supply or extract air with volume control dampers with or without reheaters Downloadable application software LONMARK compatible bus communications For use in the Desigo building automation and control system Control of damper actuators with AC 24 V 3 position signal Control of electric or LPHW reheaters with AC 24 V or AC 24 V 3 position signals Built in air flow sensor AC 24 V operating voltage Building Technologies Application Use as an I O module Functions The RXC32 controller is optimised for the control of variable air volume VAV systems It is designed for control of the supply or extract air with volume control dampers The controller may also be used for the control of electric or LPHW reheaters The controller application is determined by downloadable application software also referred to simply as the application The various applications and the associated functions are described in detail in the applications library V1 CA2A3810 V2 CA110300 The controllers are delivered pre loaded with a particular application or with basic application 00032 The basic application which contains only I O module functions is overwritten with the de
6. d Ltd Subject to change Siemens RXC32 Room controller for VAV systems CA2N3845en_04 Building Technologies 16 01 2012
7. e actuators Y3 1 Y4 1 AC 24 V contactors for electric heating coil Y3 3 Solid state relays AC24V Do not exceed the maximum simultaneous load on outputs Y1 Y4 see Engineering A power amplifier may be used to connect additional valve actuators to Y3 and Y4 see Desigo RXC installation guide CA110334 For information on actuators compatible with the RXC32 controller refer to the relevant application descriptions see Desigo RXC applications library CA2A3810 The voltage for devices with an AC 24 V supply G can be derived either from the controller or from an external source see the Desigo RXC installation guide CA110334 If the connected devices receive their supply from the controller the power consumption of these devices must be taken into account when sizing the transformer 11 14 Siemens Building Technologies RXC32 Room controller for VAV systems CA2N3845en_04 16 01 2012 Parallel connection of several thermic actuators Note Connection to controller Connection to power amplifier Notes Up to 2 thermic actuators can be connected directly to the room controller In the case of more than 2 actuators a power amplifier is required The same principle applies to output Y3 Note that the simultaneous load on outputs Y3 and Y4 must not exceed 9 5 VA Power consumption at input X1 of the UA1T 0 5 VA Mixed operation Connecting thermic actuators to the controller as well as to the power ampl
8. finitive application in the commissioning phase The RXT10 commissioning and service tool is used for this purpose see Commissioning In conjunction with a building automation and control system the RXC32 controller can also be used as a universal I O module e g to register digital signals or to control various equipment ON OFF or pulse control with AC 24 V In this case the controller is loaded with basic application 00032 The inputs can then be read and the outputs overridden via the building automation and control system Inputs and outputs Integration into the building automation and control system The controller functions are determined by the selected application and its parameters For a detailed description of functions refer to the Desigo RXC applications library V1 CA2A3810 V2 CA110300 Certain input and output parameters can be set for various functions making it possible to cover a wide range of VAV systems For parameter settings for the various applications refer to the Desigo RXC applications library V1 CA2A3810 V2 CA110300 Input Function D1 Occupancy sensor volt free contact D2 Window switch volt free contact x1 LG Ni 1000 temperature sensor passive Air quality sensor DC 0 10 V Output Function Y1 and Y2_ 3 position damper actuators AC 24 V Y3 Radiator with thermic valve AC 24 V PDM Y4 Electric reheater AC 24 V on off
9. ifier is NOT allowed Differing voltage of the power supply of the controller and the supply of the power amplifier may cause big differences in the position of the valves 00105 H ER v3 1 AC 24 V AC 24 V 00105 K N1 6G Go G GO N1 RXC32 N2 UA1T see data sheet CA2N3591 Y3 AC 24 V thermic valve actuator Y3 x AC 24 V thermic valve actuator max 2 STA72E STP72E actuators per Y1 output on the UA1T e The UA1T requires an AC 24 V supply voltage e The UA1T is not suitable for the connection of 3 position actuators 12 14 Siemens RXC32 Room controller for VAV systems CA2N3845en_04 Building Technologies 16 01 2012 Dimensions All dimensions in mm Without terminal covers With terminal covers 4 ry ou OUGOU 0000000 eoo a aaa o o o Z EEEE EE 9 3 OUODOOD 2 i Bo d 0 1 1 1 3845M02 35 3 161 152 3845M01 Drilling diagram Eor s A A go i 135 a 13 14 Siemens RXC32 Room controller for VAV systems CA2N3845en_04 16 01 2012 Building Technologies 14 14 2000 2012 Siemens Switzerlan
10. inal PPS2 The diagram below shows the wiring of the LONWoRKS bus and PPS2 interface when a QAX room unit is connected It also shows the options for connecting the RXT10 commissioning and service tool and the RXT20 1 service terminal LonWorks Bus PPS2 LonWorks Bus LonWorks Bus PPS2 3845A01en_01 LonWorks Bus RXT10 LonWorks Bus PPSA RXT10 Service terminal RXT20 1 PPS2 Service terminal RXT20 1 The yellow service LED shows the current operational status of the controller by means of different flashing patterns see the RXT10 user manual CA110338 The service pin is used to identify the controller in the commissioning phase When the pin is pressed the controller s identification number is transmitted to the RXT10 commissioning and service tool The devices are classified as waste electronic equipment in terms of the European Directive 2002 96 EC WEEE and should not be disposed of as unsorted municipal waste The relevant national legal rules are to be adhered to Regarding disposal use the systems setup for collecting electronic waste Observe all local and applicable laws 5 14 Siemens Building Technologies RXC32 Room controller for VAV systems CA2N3845en_04 16 01 2012 Engineering notes AC 24 V supply AC 24 V triac outputs Example Mounting The Desigo RXC installation guide document CA11033
11. ion standard Protection standard to EN 60529 IP30 with terminal cover fitted and wall mounted without DIN rail All other mounting arrangements IP20 Protection class Insulation protection class Ambient conditions Operation Class 3K5 to IEC 60 721 3 3 Temperature 0 50 C Humidity lt 85 rh Transport Class 2K3 to IEC 60 721 3 2 Temperature 25 65 C Humidity lt 95 rh Standards and directives Product safety Automatic electronic controls for household EN 60730 1 and similar use Electromagnetic compatibility Immunity industrial amp residential EN 60730 1 Emissions residential EN 60730 1 C compliance Meets requirements of EMC directive 2004 108 EC UL compliance UL916 C Tick conformity EMC AS NZS 61000 6 3 Environmental compatibility The product environmental declaration CA2E3840 contains data on RoHS com pliance materials composition packaging environmental benefit disposal ISO 14001 Environment ISO 9001 Quality 2002 95 EC RoHS Dimensions See dimension diagrams Width in DIN modular spacing units 8 5 Weight Excluding packaging 0 28 kg 9 14 Siemens RXC32 Room controller for VAV systems CA2N3845en_04 Building Technologies 16 01 2012 Connection terminals 11 o lal lal vy Power supply GO 1 Controller ground G 2 AC 24 V supply Analogue inputs and outputs G 3 AC 24 V supply for sensor or actuator LonWorks 2 13 4 Bus QAX 3
12. le air filter ALG 3 4 SPF Can be ordered from Schupp AG www sf filter ch order number AL700 1 Interfaces Interface with room unit Number of room units connectable Max 1 Interface type for room unit PPS2 for RXT10 LON PPS2 baud rate 4 8 kBit s LON baud rate 78 kBit s LONWORKS Bus Interface type LON LONMARK compatible electrically isolated Transceiver on RXC32 1 FTT 10A on RXC32 5 FT 5000 Baud rate 78 Kbps Bus topology and bus termination See Installation guide CA110334 8 14 Siemens RXC32 Room controller for VAV systems CA2N3845en_04 16 01 2012 Cable connections Plug in terminal blocks Solid conductors Stranded conductors without connector sleeves Stranded conductors with connector sleeves DIN 46228 1 Max tightening torque Rising cage terminals 1x 0 2 2 5mm or 2 x 0 2 1 0 mm 1x 0 2 2 5mm or 2x 0 2 1 5 mm 1x 0 25 2 5mm or 2 x 0 25 1 0 mm 0 6 Nm Single cable lengths Signal inputs D1 D2 Measured value input X1 Triac outputs AC 24 V Y 1 Y4 Interface to room unit Cable type LONWORKS bus Cable type Tool connecting cable See Installation guide CA110334 Max 100 m with diameters gt 0 6 mm Max 100 m with diameters gt 0 6 mm Max 100m where A gt 1 5 mm2 Max 115 m where A 0 75 mm including tool connecting cable 4 core twisted pair unscreened See Installation guide CA110334 See Installation guide CA110334 Max 3 m length Housing protect
13. ler is commissioned with the RXT10 commissioning and service tool This is connected to the LONWoRKS bus via a tool socket on the controller or room unit The commissioning procedure for the entire Desigo RXC range is described in detail in the RXT10 user manual document CA110338 The labeling fields Appl and Loc on the controller are used to indicate the application actually loaded and the location of the controller either in writing or by use of printed adhesive labels see Label under Mechanical design All applications including basic application 00032 allow direct interrogation of the inputs and control of the outputs using the RXT10 commissioning and service tool This makes it possible to test the installation and to operate connected plant provisionally before the complete Desigo RXC system is commissioned e The LONWorRks bus plug terminals 23 and 24 can be removed and reconnected at any time even while the controller is in operation Only the original bus plug may be used e Overloading outputs Y1 Y4 may cause the thermal fuse to trip and disable the controller After solving the problem briefly disconnect and reconnect the power supply The controller will resume normal operation after a delay of approximately 10 minutes e Outputs Y1 Y4 are not protected against accidental connection to AC 24 V This can damage the triacs e For accurate measurement of the air volume make sure that
14. or Printed adhesive label printed from the RXT10 commissioning and service tool Connection terminals All connection terminals are detachable plug in terminals They are arranged so that under normal circumstances all incoming and outgoing cables can be connected without crossing Cable strain relief The conductors to the connection terminals can be secured with cable ties to the housing base Flow sensor The sensor uses an integrated NTC thermistor to measure the cooling effect of the air flow The effect of the air temperature is compensated by the sensor The controller processor calculates the air flow by means of the sensor signal 4 14 Siemens RXC32 Room controller for VAV systems CA2N3845en_04 Building Technologies 16 01 2012 Communication LONWoRKS Bus and PPS2 Service LED Service pin Disposal The RXC32 controller communicates with other devices via the following interfaces e LONWoRKS bus terminals CLA and CLB for communication with the PXR system controller or the NIDES RX interface to Desigo other Desigo RXC devices LONMARk compatible 3 party devices e g presence detector e PPS2 terminals CP and CP Interface to the QAX room units In addition to PPS2 the LONWORKS bus is also looped to the tool socket on the room unit e Tool socket RJ45 on the controller or room unit for RXT10 commissioning and service tool LONWoRKS bus RXT20 1 service term
15. socket a service LED and a service pin 90130 p Cable restraints Connection for volume measurement Plug in connection terminals for LONWORKS bus Housing cover 9 Housing base Connection for volume flow Service LED measurement Service pin Tool socket Terminal covers RXZ30 1 are available as an option to protect the connection terminals from physical contact and contamination The terminal covers also provide strain relief for the cables The service LED remains visible when the terminal covers are in place and the service pin can be operated with a pointed implement When fitting the terminal covers ensure that they lock into place 3 14 Siemens RXC32 Room controller for VAV systems CA2N3845en_04 Building Technologies 16 01 2012 Removing the terminal cover Label Bar code Code 128 _ Identification Identification number Protection standard Ps QAX NWorks Technology Lo rigin S erla Hex Siemens d Temperature range 0 50 C Preloaded Test date series Z A B C i stod Nope sdiscannect may be provided Serial No m mi eee 3845Z01_02 Factory loaded p application ee a Definitive f application Location Note Options for use of the labeling fields Appl and Loc Hand written entry of the location and the actual application
16. the tubes are connected correctly 7 14 Siemens RXC32 Room controller for VAV systems CA2N3845en_04 Building Technologies 16 01 2012 Technical data Power supply Operating voltage SELV PELV AC 24 V 20 Building Technologies Rated voltage AC 24 V Frequency 50 60 Hz Power consumption Without field devices 6 VA With field devices Max 33 VA Internal fuse Thermal automatic reset Supply cable protection external fuse lt 10A Inputs Signal inputs for volt free contacts Quantity 2 D1 D2 Contact voltage DC 33 V Contact current DC 8 mA Contact transfer resistance Max 100 Q Contact insulation resistance Min 50 kQ Not suitable for pulse control Measured value input for temp measurement Quantity Suitable temperature sensors 1 x1 Measuring range LG Ni 1000 Sensor current 40 110 C Resolution 2 5 MA Accuracy lt 0 2K 1 X1 selected by option button in RXT10 tool At 25 C 0 2K LG Ni 1000 0 10 V Outputs Triac outputs AC 24 V Quantity 4 Y1 Y4 Output voltage AC 24 V on off PDM or 3 position selected by switch Output current Max 0 5 A Total nominal load Max 24 VA load on all outputs simultaneously Flow sensor Tube connections nipple diameters 5 2 mm Measuring range 0 300 Pa Overload range 0 100 k Pa Volume measurement Accuracy with dynamic calibration CEN TC247 Accuracy class 2 Accuracy with static calibration CEN TC247 Accuracy class 1 Air filter Examp
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