Radiocrafts RC1180-KNX Multiprotocol Wireless Application Solution

Radiocrafts’ RC1180-KNX is a high-performance surface-mounted transmitter module with a size of only 12.7 x 25.4 x 3.3 mm, which can be easily integrated into sensors or actuators. It uses a UART interface for serial communication and configuration, and the antenna directly Connect to RF pins, suitable for European standards (CENELEC EN 50090 and CEN EN 13321-1), international standards (ISO/IEC 14543-3), Chinese standards (GB/Z 20965) and American standards (ANSI/ASHRAE 135). The operating frequency is 868.0 – 870.0 MHz, the operating voltage is 2.0 – 3.9 V, and it has ultra-low power consumption. It is mainly used in home and building control, HVAC, AMR and automatic meter reading and gateways. This article introduces the main features of RC1180-KNX, Typical connection diagrams, application schematics, and three RCxxxxDK-USB demo board block diagrams, circuit diagrams, bill of materials, and PCB component layouts.

The RC1180-KNX® RF Transceiver Module is a compact surface-mounted high performance module with embedded KNX-RF Multi protocol as defined by the KNX Association ( The module has a UART interface for serial communication and configuration. The module is pre-certified for operation under the European radio regulations for license-free use and measures only 12.7 x 25.4 x 3.3 mm with shielding. When used with quarter-wave antennas a line-of-sight range of 600-800 meter can be achieved. The RC1180-KNX meets the KNX specification and supports S, A and E modes, and operates in the 868 MHz frequency band. The physical layer complies with the relevant parts of the EN 50090 (ISO/IEC 14543-3).

RC1180-KNX main features:

 Embedded KNX-RF protocol (KNX-RF v1.1, KNX Ready and KNX-RF Multi)

 Frequency agility, by using up to 5 channels

 Fast link acknowledgement of up to 64 receivers

 Automatic retransmissions

 Repeaters, extending range of KNX-RF Multi messages by 2 hops and KNX-RF Ready messages by 6 hops

 Binding of up to 64 other KNX-RF devices

 Listen Before Talk (LBT) to reduce collisions

 Automatic battery supervision

 Received Signal Strength Information (RSSI)

 Pin compatible with the Wireless M-Bus module RC1180-MBUS

 12.7 x 25.4 x 3.3 mm compact module for SMD mounting

 Completely Shielded

 Wide supply voltage range, 2.0 – 3.9 V

 Ultra low power modes for extended battery lifetime

 Conforms with EU R&TTE directive (EN 300 220, EN 301 489, EN 60950)

 Confirms with EN 50090 (ISO/IEC 14543-3)

 Designed for EX compliance

RC1180-KNX application:

 Home and building control


 AMR, Automatic Meter Reading

 Gateways KNX RF/KNX-IP/KNX Twisted Pair
Radiocrafts RC1180-KNX Multiprotocol Wireless Application Solution
Figure 1. Typical connection diagram of RC1180-KNX

Figure 2. Schematic diagram of typical application of RC1180-KNX

RCxxxxDK-USB Demo Board

The Demonstration Kit (DK) is designed to make it easy for the user to evaluate the onboard module, develop an application and build prototypes very quickly. The kit includes two Demo Boards (DB). The demo board contains the selected module with its dedicated article number and embedded protocol and associated support circuits. The board can easily be operated using a PC terminal emulator or the RCTools PC suite from Radiocrafts.

Figure 3. RCxxxxDK-USB Demo Board Outline Diagram

The Demo Board contains USB connector, USB to serial converter, buttons, LEDs, voltage regulator, configuration jumpers and connectors to make it easy to interface the onboard module with various test equipment or the host used in an application. Not all components are needed in an actual application. Please see the datasheet for each specific module for a typical application circuit.

The Demonstration Board comes in different versions, equipped with the different variants of Radiocrafts modules. Among the frequencies supported are 433 MHz, 868 MHz, 915 MHz and 2.45 GHz. For each frequency there exist narrowband versions and wideband versions.

This covers the most used frequency bands, the 433 MHz band in Europe and the US, the 868 MHz band in Europe, the 902-928 MHz band in the US and the 2 450 MHz band worldwide.

The actual module mounted can be seen on the marking on the module itself.

Figure 4. RC11xxDB-USB block diagram

Figure 5. RC12xxDB-USB block diagram

Figure 6. RC2xxxDB-USB block diagram

Figure 7. RC12xxDB/RC10xxDB-USB circuit diagram

Figure 8. RC11xxDB-USB circuit diagram

Figure 9. RCxxxxDB-USB circuit diagram

RC11xxDB-USB Bill of Materials:

RC12xxDB-USB Bill of Materials:

RC2xxxDB-USB Bill of Materials:

Figure 10. Demo Board PCB Component Layout

For details, see:

The Links:   FF200R12MT4 SKM400GB124D