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How to

How to


Products: RP-C, RP-C-EXT-0-10V-4, RP-C-EXT-0-10V-4-PD, RP-C-EXT-BL-2-LV-PD, RP-C-EXT-BL-4-HV-PD, RP-C-EXT-BL-SMI-2-LV-PD, RP-C-EXT-BL-SMI-4-HV-PD, RP-C-EXT-DALI, RP-C-EXT-DALI-M-PD, RP-C-EXT-MS-BLE, RP-C-EXT-REL-4
Functionalities: Hardware
Product version: 3.2
9/1/2020

Connecting RP Series Expansion Modules and Multi-sensors to RP-C

You connect RP Series expansion modules and multi-sensors to the RP-C room bus to provide the devices with power and communication from the RP-C controller.

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The RP-C room bus allows RP Series 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 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. 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 Room Bus port (RS-485 Com B) is configured and allocated for the room bus. For more information, see RP-C Communication Ports .

 
action_zoom_plus_stroke Location of the Room Bus ports and address switches on the RP-C controllers and RP Series expansion modules and multi-sensors
Figure: Location of the Room Bus ports and address switches on the RP-C controllers and RP Series expansion modules and multi-sensors

You can connect a single RP Series expansion module or multi-sensor to the room bus, or you can connect up to six devices in a daisy-chain configuration.

Note:

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 Series expansion modules and multi-sensors with the following restrictions:

  • Maximum of two DALI light modules

  • Maximum of two SMI blind modules

  • Maximum of four multi-sensors

 
action_zoom_plus_stroke Example of supported combination of RP Series expansion modules and multi-sensors on the RP-C room bus
Figure: Example of supported combination of RP Series expansion modules and multi-sensors on the RP-C room bus

Each RP Series 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 Series 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. For more information, see RP Series 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 Series expansion module or multi-sensor 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 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.

Note:

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.

Note:

An RP Series expansion module and multi-sensor can be put into different maintenance modes in which the device is either offline or online. For more information, see RP Series Expansion Module and Multi-sensor Maintenance Modes .

Notice

LOSS OF COMMUNICATION

Locate the room bus wiring away from external electromagnetic noise sources such as high voltage cables and Variable Frequency Drives (VFDs) for AC motors.

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

Notice

EQUIPMENT DAMAGE

Do not connect an Ethernet cable from the controller's Sensor Bus port (RS-485 Com A) or Room Bus port (RS-485 Com B) directly to an external Ethernet switch or router.

Failure to follow these instructions can result in equipment damage.

To connect RP Series expansion modules and multi-sensors to RP-C

  1. Install the RP Series expansion module or multi-sensor and connect a Cat 5 (or higher) unshielded, straight-through wired cable with eight conductors (four twisted pairs) to one of the two RJ45 receptacles on the module or multi-sensor. Use a cable with the wire size (cross-sectional area) 22 to 26 AWG (0.34 to 0.14 mm²).

     
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  2. Connect the other end of the cable to the RP-C controller's RS-485 port that is configured for the room bus.

    Note:

    By default, the Room Bus port is configured for the room bus.

     
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  3. When an additional RP Series expansion module or multi-sensor is needed, install the device and connect the other end of the cable to the unused RJ45 receptacle on the previous module or multi-sensor.

    Note:

    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.

     
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  4. Repeat step 3 to install additional devices up to the maximum number of six devices of the supported combination of RP Series expansion modules and multi-sensors. For more information, see RP-C Room Bus .

  5. Ensure that the rotary switch on each RP Series expansion module and multi-sensor is configured to give the device a unique room bus address in the range of 1 to 6.

    For more information, see Configuring the Room Bus Address for an RP Series Expansion Module .

    For more information, see Configuring the Room Bus Address for an RP Series Expansion Multi-sensor .

    For more information, see RP Series Expansion Module Room Bus Addressing .

See Also

  • RP-Cs
  • RP-C Room Bus
  • RP-C Communication Ports
  • Configuring the Room Bus Address for an RP Series Expansion Module
  • Configuring the Room Bus Address for an RP Series Expansion Multi-sensor
  • RP Series Expansion Module Room Bus Addressing