RP-C Room Bus

The RP controller room bus allows RP controller expansion modules to be connected to the controller for people counting, motion detection, luminosity and sound pressure level measurements, Bluetooth Low Energy based applications, 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 RP controller expansion modules.

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 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. For more information, see Wiring .

Notice
LOSS OF COMMUNICATION Ensure that the total length of the room bus does not exceed 72 m (236 ft). Use a Cat 5 or higher unshielded twisted pair cable with eight conductors (four twisted pairs), a cross-sectional area of 22 to 26 AWG (0.34 to 0.14 mm ² ), and a rating that meets the requirements of the target environment. Failure to follow these instructions can result in loss of communication.

By default, the RP-C controller's RS-485 Com B port is configured and allocated for the room bus. For more information, see RP-C Communication Ports .

Restrictions for Connecting RP Controller Expansion Modules to the RP-C Room Bus

The maximum number of RP controller expansion modules that can be connected to the RP-C room bus, and the restrictions that apply to certain types of the modules, vary depending on the RP-C controller model. In this respect, the RP-C controller models are divided in the following two categories:

RP-C Advanced: RP-C-12A-F-24V, RP-C-12B-F-24V, RP-C-12C-F-24V, and RP-C-16A-F-230V
RP-C Pro and RP-C Pro Plus: RP-C-16B-F-24V, RP-C-16B-F-230V, and RP-C-16C-F-230V

For more information, see RP-C Models .

Important:

The restrictions listed below only apply to Connected Room Solutions for Buildings. For Connected Room Solutions for Hotels, it is recommended to use the RP-C Pro controller. For additional information on what restrictions apply to Connected Room Solutions for Hotels, see the supplementary document Architecture Guidelines – Hotel Application.

RP-C-12A-F-24V, RP-C-12B-F-24V, RP-C-12C-F-24V, and RP-C-16A-F-230V

To the room bus of the RP-C-12A-F-24V, RP-C-12B-F-24V, RP-C-12C-F-24V, and RP-C-16A-F-230V controller models, you can connect a single RP controller expansion module, or you can connect up to six devices in a daisy-chain configuration.

Note:

When connecting devices to the RP controller room bus through a daisy-chain configuration, the room bus ports on the device are interchangeable.

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-sensor or Insight-Sensor devices

action_zoom_plus_stroke

Figure: Example of supported combination of RP controller expansion modules on the RP-C room bus

Each RP controller expansion module has a rotary switch, which is used to give the device a unique address on the room bus. An RP controller expansion module 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. For more information, see 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.

Notice
LOSS OF COMMUNICATION Ensure that the rotary switch on the RP controller expansion module is configured to give the device a unique room bus address in the range of 1 to 6. Failure to follow these instructions can result in loss of communication.

Notice

LOSS OF COMMUNICATION

Ensure that the rotary switch on the RP controller expansion module is configured to give the device a unique room bus address in the range of 1 to 6.

Failure to follow these instructions can result in loss of communication.

Table: Room Bus Addresses

Address	Description
0	Maintenance mode. Device offline.
1 to 6	Valid addresses for devices connected to the room bus of the RP-C-12A-F-24V, RP-C-12B-F-24V, RP-C-12C-F-24V, and RP-C-16A-F-230V controller models.
7 to 9	Addresses not supported by the RP-C-12A-F-24V, RP-C-12B-F-24V, RP-C-12C-F-24V, and RP-C-16A-F-230V controller models or the EcoStruxure Building Operation software. Device offline.

Note:

Devices connected to the RP controller 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.

Note:

An RP controller expansion module can be put into different maintenance modes in which the device is either offline or online. For more information, see RP Controller Expansion Module Maintenance Modes .

RP-C-16B-F-24V, RP-C-16B-F-230V, and RP-C-16C-F-230V

To the room bus of the RP-C-16B-F-24V, RP-C-16B-F-230V, and RP-C-16C-F-230V controller models, you can connect a single RP controller expansion module, or you can connect up to nine devices in a daisy-chain configuration.

Note:

When connecting devices to the RP controller room bus through a daisy-chain configuration, the room bus ports on the device are interchangeable.

The RP-C room bus supports up to nine connected RP controller expansion modules with the following restrictions:

Maximum of two DALI light modules
Maximum of two SMI blind modules
Maximum of seven Multi-sensor or Insight-Sensor devices

action_zoom_plus_stroke

Figure: Example of supported combination of RP controller expansion modules on the RP-C room bus

Each RP controller expansion module has a rotary switch, which is used to give the device a unique address on the room bus. An RP controller expansion module can be given any address in the range of 1 to 9. Configuring the address 0 means that the device enters maintenance mode and goes offline. For more information, see 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.

Notice
LOSS OF COMMUNICATION Ensure that the rotary switch on the RP controller expansion module is configured to give the device a unique room bus address in the range of 1 to 9. Failure to follow these instructions can result in loss of communication.

Notice

LOSS OF COMMUNICATION

Ensure that the rotary switch on the RP controller expansion module is configured to give the device a unique room bus address in the range of 1 to 9.

Failure to follow these instructions can result in loss of communication.

Table: Room Bus Addresses

Address	Description
0	Maintenance mode. Device offline.
1 to 9	Valid addresses for devices connected to the room bus of the RP-C-16B-F-24V, RP-C-16B-F-230V, and RP-C-16C-F-230V controller models.

Note:

Functionality

Products

How to

Specifications

Troubleshooting

Developers Reference

Concept

RP-C Room Bus

Restrictions for Connecting RP Controller Expansion Modules to the RP-C Room Bus

Functionality

Products

How to

Specifications

Troubleshooting

Developers Reference

Concept

RP-C Room Bus

Restrictions for Connecting RP Controller Expansion Modules to the RP-C Room Bus

See Also