Data Sheet for Product

ManualsBrandsSiemens ManualsBuilding automationDesigo RXC The comprehensive range for individual rooms

CA2N1648en_05

2015

-12-23

Building Technologies

648

Desigo

™ RXC

Flexible room unit

QAX50.1

QAX50.5

QAX51.1

QAX51.5

for integrated operation of HVAC, lighting and blinds in individual rooms;

with LONMARK®-compatible bus communication

• Room temperature measurement

• Buttons for adjustment of the room temperature setpoint

• Rocker switch for mode selection (

/ Auto) and for manual control of the fan

in fan-coil systems (up to 3 speeds)

• LCD with room temperature and control mode display

• Panel for configurable buttons for the operation of lighting and blinds

• Off-button (

), to switch room lighting off and set HVAC system to an energy-

saving mode

• L

ONMARK®-compatible bus communications

• Power supply via the two-wire bus (L

ONWORKS® bus, LPT-10)

• Socket for RXT10 commissioning and service tool

Summary of content (10 pages)

PAGE 1
648 Desigo™ RXC Flexible room unit QAX50.1 QAX50.5 QAX51.1 QAX51.
PAGE 2
Use The flexible room unit is used in conjunction with the Desigo RXC room automation system for measurement of the room temperature and for integrated operation of HVAC, lighting and blinds. The HVAC functions are identical to those of the QAX34.1 room unit. The functions for operating lighting and blinds can be configured flexibly to match the requirements in the room.
PAGE 3
Ordering When ordering, please specify the quantity, product name, type code and configuration. Unconfigured room units Unconfigured units are available only in the basic versions shown under “Type summary” above. The configuration code for these units is C000. Example: 7 Flexible room units Button sets QAX51.5 / C000 The two different button sets can also be ordered separately: • • Set A: SAP ordering No. 4268 277 30 (on/off lighting control) Set B: SAP ordering No.
PAGE 4
Operator controls and display 80069 A Buttons for adjustment of the room temperature setpoint Room temperature and control sequence (heating / cooling) display Display of current control mode or current fan speed Rocker switch for selection of control mode and fan speed Configurable control panel (example of configuration) Note The actual functions of the operator controls and display panel are determined by the downloaded application. The description below covers all the possible options.
PAGE 5
LCD display In normal operation, the following may be displayed (depending on the application parameters) For details refer to the Desigo RXC Applications library, CA2A3810 (V1) or CA110300 (V2).: Display element (examples) Description Room temperature in °C (resolution 0.5 °C) Room temperature in °F (resolution 1.0 °F) Digital display of setpoint adjustment (displayed only while relative adjustment is in progress).
PAGE 6
80096 A Removing the buttons/rocker switches “Search” LED There are two LEDs under the top button/rocker switch on the configurable control panel. These remain permanently on so that the unit can be located more easily in the dark. “Service” LED The yellow “Service” LED is fitted under the last button/rocker switch on the configurable panel and indicates the status of the room unit by means of different flashing patterns (see the RXT10 user manual, CM110669).
PAGE 7
80091 A 1 2 Fit to top rail (1) and snap-mount on bottom rail (2) Installation notes • • • STOP Warning Local installation regulations must be observed. Do not route mains voltage cables to the conduit box. Use only the original bus plug. The room unit is not protected against connection to AC 230 V. Commissioning notes The QAX50 and QAX51 flexible room units are commissioned with the RXT10 commissioning and service tool. This is connected to the LONW ORKS® bus via the tool socket.
PAGE 8
Notes on operation During normal operation and commissioning, the LCD panel also serves to display error messages: Display Description Room temperature sensor outside range 0 ... 40 °C Technical data Power supply Function data Interfaces Cable connection Max. DC 42 V (SELV) Max. DC 42 V class 2 (US) The Room unit receives its power via the LONW ORKS® bus in accordance with specification LPT-10 Power consumption Max. 0.3 W Temperature sensor Measuring element NTC resistor Measuring range 0 ...
PAGE 9
Protection data Ambient conditions Standards, directives and approvals Environmental compatibility Dimensions Color Weight Housing protection Protection class Operation Ambient air conditions Temperature Humidity Mechanical conditions Transport Ambient air conditions Temperature Humidity Mechanical conditions Product standard EN 60730-1 IP 30 to EN 60529 III to EN 60730-1 IEC 721 Class 3K5 0 ... 50 °C < 85 %rh Class 3M2 IEC 721 Class 2K3 – 25 ...
PAGE 10
Dimensions All dimensions in mm Published by: Siemens Switzerland Ltd. Building Technologies Division International Headquarters Gubelstrasse 22 6301 Zug Switzerland Tel. +41 41-724 24 24 www.siemens.