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Building Technologies Basic documentation: Communication via the KNX bus CE1P3127en
HVAC Products Device addresses via ACS 30.08.2007
5.6 Device address for the RXB/RXL room
controllers
The RXB and RXL room controllers have the same application set. Both types can
communicate via KNX in LTE mode (the RXB also communicates in S-mode).
The main differences between the RXB and RXL room controllers are the operating
voltage and the KNX certification:
• RXB AC 230 V operating voltage KNX certified
• RXL AC 24 V operating voltage Not KNX certified
Commissioning is also described in the Description of Functions, CM110385.
The RXB and RXL room controllers do not power the bus.
Decentral or central bus power supply is required for communication via the KNX
bus (see section 2.2).
The factory-setting is device address 255. For communication via KNX, this device
address must be modified.
If there are no couplers or IP routers, the factory-set area/line address 0.2 is used.
1. In ACS Service select Plant > Edit device list… to open the "Edit device list" dialog
box (see section 5.2.1).
2. Select the room controller with the left mouse button and click the button
marked Manually… to open the "Address assignment" dialog box.
3. Enter a device address in the range 1…253 (excluding 150), and confirm by
clicking the Write button.
1. Set the room controller locally to programming mode. To do this, press the
programming button (bottom right on the central communication unit) for a
maximum of 2 seconds. The LED (above the programming button) lights up
when the room controller is programming mode.
2. In ACS Service select Plant > Edit device list… to open the "Edit device list" dialog
box (see section 5.2.3). Click the Programming mode… button to open the "Address
assignment" dialog box.
3. Enter a device address in the range 1…253 (excluding 150), and confirm by
clicking the Write button.
The room controller only switches to programming mode if the bus power is
available.
The LED indicates whether the room controller is in programming mode as follows:
• LED flashing, green Normal mode
• LED on, red Programming mode (LED is extinguished automatically
once the device address has been adopted).
Introduction
Note
Bus power supply
Device address
Assigning addresses
manually
Programming mode
Bus voltage
LED display
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