The RP-C room bus allows RP controller expansion modules and multi-sensors to be connected to the controller for motion detection, luminosity measurements, communication with remote control (RP-C-RC-BLE), and control of electric lights and window blinds.
The room bus is a proprietary RS-485 bus, which is designed to provide both 24 VDC power supply and communications for the connected modules and multi-sensors.
The maximum total length of the room bus is 72 m (236 ft). The room bus uses a Cat 5 (or higher) unshielded, straight-through wired cable with eight conductors (four twisted pairs) and RJ45 connectors. The wire size (cross-sectional area) should be 22 to 26 AWG (0.34 to 0.14 mm²). When the RP-C controller is installed in a space that handles conditioned air or return air, the room bus cables and IP network cables frequently must be plenum-rated to meet applicable building codes. Für weitere Informationen siehe Wiring .
By default, the RP-C controller's Room Bus port (RS-485 Com B) is configured and allocated for the room bus. Für weitere Informationen siehe RP-C Communication Ports .
The restrictions listed below only apply to Connected Room Solutions for Buildings. For information on what restrictions apply to Connected Room Solutions for Hotels, see the supplementary document Architecture Guidelines – Hotel Application.
You can connect a single RP controller expansion module or multi-sensor to the room bus, or you can connect up to six devices in a daisy-chain configuration.
When connecting devices to the RP-C room bus through a daisy-chain configuration, it does not matter if the incoming and outgoing cables are connected to one or the other room bus port on the device.
The RP-C room bus supports up to six connected RP controller expansion modules with the following restrictions:
Maximum of two DALI light modules
Maximum of two SMI blind modules
Maximum of four multi-sensors
Each RP controller expansion module and multi-sensor has a rotary switch, which is used to give the device a unique address on the room bus. An RP controller expansion module or multi-sensor can be given any address in the range of 1 to 6. Configuring the address 0 means that the device enters maintenance mode and goes offline. Configuring an address in the range of 7 to 9 also means that the device goes offline. Für weitere Informationen siehe RP Controller Expansion Module Room Bus Addressing . An incorrectly configured switch can cause two devices to have the same address on the room bus, which means that both devices will be offline.
Address |
Description |
0 |
Maintenance mode. Device offline. |
1 to 6 |
Valid addresses supported by the EcoStruxure Building Operation software. |
7 to 9 |
Reserved for future use. Addresses not supported by the EcoStruxure Building Operation software. Device offline. |
Devices connected to the RP-C room bus through a daisy-chain configuration can be assigned addresses regardless of the order in which the devices appear in the daisy chain. For example, device number 1 can have the address 6, device number 2 can have the address 4, and so on.
An RP controller expansion module and multi-sensor can be put into different maintenance modes in which the device is either offline or online. Für weitere Informationen siehe RP Controller Expansion Module and Multi-sensor Maintenance Modes .