Building Technologies RXB room automation system System overview
Contents Comfort and well-being in every room ........................................................................ 5 Range overview ............................................................................................................. 6 Coordinated room controllers ...................................................................................... 7 The room units: the key to individual comfort........................................................... 8 Applications ..........................
Comfort and well-being in every room Most people in the industrial world spend 90 % of their time indoors. About one third of this time is spent at work. In this context it is clear that good indoor air quality, the right room temperature and draughtfree air renewal are vital prerequisites for motivation and a sense of well-being. The RXB room automation system ensures individual demand-based comfort for room users in public buildings, offices, schools, hotels and so on.
Range overview RXB is an innovative range of room controllers and room units. Data communications are based on KNX technology. The RXB devices are certified by the Konnex Association. The RXB hardware The range comprises room controllers and room units for HVAC operation. The input and output configurations of the compact controllers, and the style of housing are fully optimized to suit their field of application. Electrical The HVAC functions are operated via standard room units.
Coordinated room controllers RXB21.1, RXB22.1 and RXB39.1 compact room controllers for fan-coil units The input/output configuration and mounting options of these room controller s makes them ideal for fan coil applications. They can be installed in fan coil units, in control panels or on ducting. RXB24.
The room units: the key to individual comfort The room units of the RXB range cover the widely varying requirements of individual room occupants. When designing these stylish room units, the designers also paid special attention to ergonomic factors.
Type QAX 30.1, 31.1 Functionality of the room units Built-in room temperature sensor Room temperature setpoint adjustment Selection of operating mode ( /Auto) 1) Selection of operating mode ( /Auto) and fan speed 1) QAX 32.1 QAX 33.1 QAX 34.3 QAX 31.1 2) Wireless room units Batteryless EnOcean technology KNX Bus communications Auto: : QAX 9x.4 QAX 96.4 97.4 98.4 QAX 97.4 98.4 QAX 98.
Applications The scope of the RXB controllers is defined by the pre-programmed application modules. The following is an overview of the various applications and associated controllers. The controllers are shipped from the factory pre-programmed with a set of applications. The required application is then enabled with a tool (ETS, ACS or the "HandyTool"). Due to the fact that the applications are largely pre-defined, engineering simply involves the definition of a small number of parameters, e.g.
Installation The RXB controllers are designed for various types of installation (mounted with screws or on DIN rail): • In fan coil units • In control panels • In ceiling voids • Under floors • In sill or floor ducting. 01654 Various options for installation Terminal covers are required when mounting the controllers outside control panels or fan coil units (see page 18, Accessories). 70227 Example: RXB21.
Engineering and commissioning The RXB controllers can be operated either as stand-alone controllers or in conjunction with a building automation and control system. They are commissioned with one of the following tools, depending on their intended function: – ETS Professional – ACS – The "HandyTool" (parameter-setting function of the QAX34.
Parameter setting For details, please refer to documents CM110384 and CM110385. Communications links For the integration in building automation and control systems, communications links are created by use of group addresses (ETS).
Addressing Every device must have its own physical address. Addresses can be assigned with one of the three tools. Options for connecting the tools 1 1. 2. 3. 4. 5.
Integration into building automation and control systems BACnet USB OCI700 / OCI702 KNX / EIB Backbone RMH... RMU... Bus supply Standalone operation at field level The room automation system can be operated as a standalone system. All the necessary functions can be implemented by means of the KNX communications between RXB controllers, and between these and any KNX-compatible third-party equipment.
Integration into the management level Depending on the degree of complexity required, a management station incorporates the following program modules for the user: • • • • • Graphics-based operation of the site (plant graphics) Time schedules for a wide range of switching routines Display and modification of data point values Routing of alarm messages etc. Example of a graphic user interface.
Central and local control of operating mode The diagram below shows an example of how the central time schedules (Building use and Room occupancy) interact with the local /Auto control on the room unit (operating as an occupancy function in this case). It is also possible to use a presence detector for local control. 10380z11en Building use Room occupancy Room operating mode Comfort 1) Pre-Comfort (Stand-by) 2) Economy 3) Local /Auto Auto 07.
RXB overview RXB room controllers Document RXB21.1, RXB22.1 Room controller for fan-coil units CM2N3873 RXB24.1 Room controllers for chilled ceilings and radiators CM2N3874 QAX30.1 Room unit with temperature sensor CA2N1741 QAX31.1 Room unit with temperature sensor and setpoint adjuster CA2N1741 QAX32.1 Room unit with temperature sensor, setpoint adjuster and RXB room units /Auto switch CA2N1641 QAX33.1 Room unit with temperature sensor, setpoint adjustment and QAX34.
Published by: Siemens Switzerland Ltd Building Technologies Division International Headquarters Gubelstrasse 22 CH-6301 Zug Tel. +41 41-724 24 24 Fax +41 41-724 35 22 www.buildingtechnologies.siemens.
