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Specifications Specifications 9/22/2021
Products: RP-C-EXT-KNX
Functionalities: Engineering, Hardware
Product version: 3.3, 2022

RP-C-EXT-KNX

RP-C-EXT-KNX (KNX Modbus gateway)

RP-C-EXT-KNX (KNX Modbus gateway)

Introduction

SpaceLogic* RP-C-EXT-KNX KNX Modbus gateway connects to the SpaceLogic RP controllers and provides an interface between the controller and KNX devices such as push-buttons, sensors, and control units for lights, blinds, and room temperature.

The KNX Modbus gateway allows bi-directional control and monitoring of all parameters and functions of the connected KNX devices, which can be used to control lights and blinds in a room.

The KNX Modbus gateway is a Modbus to KNX interface that connects to one of the RP-C controller's configurable RS-485 ports. The KNX Modbus gateway provides a galvanic isolation between the KNX bus and the RP-C Modbus (RS-485) network.

The KNX Modbus gateway can be programmed through the ETS© software for installation, configuration, and commissioning of KNX devices. The assignment of KNX objects to Modbus registers is configured through parameters in the ETS product database.

The KNX Modbus gateway supports KNX long frames.

The KNX Modbus gateway is designed for installation on a DIN rail with a width of 1 unit (18 mm or 0.7 inch).

The KNX Modbus gateway has two push-buttons and three LEDs on the front to enable local operation of the device and status indication.

The KNX Modbus gateway can be used with a standard Schneider Electric KNX power supply to power the KNX devices on the KNX bus.

* Formerly known as SmartX.

Features

The KNX Modbus gateway has the following features:

  • Up to 250 KNX data points (10 KNX devices) can be connected to the KNX Modbus gateway

  • Power and data communication through the RP-C Modbus (RS-485) network

  • Configuration through EcoStruxure Building Operation software

  • Programming through ETS© software

  • KNX long frames are supported

  • Designed for DIN rail installation

  • Push-buttons for synchronization (write) and read of all KNX group objects

  • Status LEDs for device mode, KNX bus, and Modbus communication

Modbus network

The RP-C controller has two RS-485 ports, which can be configured for different types of networks. When configured for Modbus communications, the RP-C controller also provides 24 VDC power supply to the KNX Modbus gateway through the RS-485 interface.

The Modbus RTU protocol is used for the RP-C Modbus network. RS-485 is the electrical interface.

The KNX Modbus gateway has two 3-position pluggable screw terminal blocks for connection to the RP-C Modbus (RS-485) network. The RP-C controller's RS-485 ports are RJ45 ports.

Maximum one KNX Modbus gateway can be connected to each RP-C controller.

Part Numbers

Product

Part number

RP-C-EXT-KNX
SXWREKNX10001
Specifications
Electrical
DC input supply voltage
24 VDC
  
Powered by the RP-C
Maximum power consumption
<0.24 W from the KNX bus
  
<0.24 W from the RP-C
Environment
Ambient temperature, operating
-5 °C to +45 °C (23 °F to +113 °F)
Ambient temperature, storage
-25 to +70 °C (-13 to +158 °F)
Humidity
5 to 93 % RH non-condensing
Material
Ingress protection rating
IP 20
Mechanical
Dimensions
18 W x 90 H x 60 D mm (0.7 W x 3.5 H x 2.4 D in.)
Weight
50 g (1.76 oz)
Installation
DIN rail
Software requirements
EcoStruxure Building Operation software
version 3.2 and later
ETS® software 
version 5 and later
RP controller firmware
version 3.02 and later
Agency compliances
Emission
BS/EN 61000-6-3:2007 + A1:2011; BS/EN 50491-5-2:2010
Immunity
BS/EN 61000-6-2:2005; BS/EN 50491-5-3:2010
Safety standards
IEC/BS/EN 63044-3:2018
RP-C Modbus communications
Communication protocol (configurable)
Modbus RTU
Electrical interface
RS-485
  
Maximum total length of the RP-C Modbus (RS-485) network: 72 m (236 ft)
KNX bus communications
Transmission media
Twisted pair (TP)
Maximum APDU length
55
Device model
System B
Hardware
CPU type
ARM Cortex-M0+ single-core
Frequency
14.7456 MHz
SRAM (embedded)
32 KB
Flash memory (embedded)
256 KB
Status indicator
LED (green and red) that shows the KNX communication status
  
LED (green and red) that shows the Modbus RTU communication status
  
LED (green and red) that shows the device mode (operating or programming mode)
  
One LED (red) for programming mode
Buttons
One push-button for synchronization of KNX objects (writing all KNX group objects)
  
One push-button for reading all KNX group objects
  
One button for programming mode
Connectors
4-conductor KNX connectors with PUSH WIRE® connection, 2-pole, dark gray/red
Terminal blocks
3-position pluggable screw terminal block for power supply from the RP-C
  
3-position pluggable screw terminal block for Modbus communication with the RP-C
  
Wire cross-sectional area: 0.34 to 2.5 mm 2 (22 to 14 AWG)

Connections, LEDs, and Buttons

RP-C-EXT-KNX connections, LEDs, and buttons

RP-C-EXT-KNX connections, LEDs, and buttons

Supported KNX Push-buttons

Product

Part number

KNX Push-button PRO a

MTN6180

KNX Multitouch PRO a

MTN6215

KNX Push-button

MTN617XXX

MTN625XXX

MTN627XXX

MTN628XXX

KNX Push-button with room temperature control unit

MTN6212

MTN6214

  1. Limited functionality supported.

Supported KNX Sensors

Product

Part number

KNX ARGUS 180, flush-mounted

MTN6318..

KNX ARGUS 180/2.20 m, flush-mounted

MTN6317..

KNX ARGUS 220, surface-mounted

MTN6325..

KNX ARGUS Presence 180/2.20 m, flush-mounted

MTN6304..

KNX High Bay presence detector, flush-mounted

MTN6304-0019

KNX High Bay presence detector, surface-mounted

MTN6354-0019

KNX Mini presence detector, flush-mounted

MTN6303-0019

KNX ARGUS Presence Basic, flush-mounted

MTN6307..

KNX ARGUS Presence, flush-mounted

MTN6308..

KNX ARGUS Presence with light control and IR receiver, flush-mounted

MTN6309..

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