AMB8426-M Compact Wireless M-Bus Radio Module 868 MHz SRD Band Key Features Low-cost Wireless M-Bus radio module (868 MHz SRD Band) Embedded Wireless M-Bus according to EN13757-4:2005 standard Range* up to 700 m (line of sight) Small form factor: 17 x 27 x 4 mm Optimized for battery use Easy switching between operating modes S1, S1m, S2, T1, T2, R2 Communication and configuration via UART/SPI Interface Supports AES128 data encryption Conforms with EU R&TTE 1999/5/EC directive Available on Tape & Reel for SMD mounting Description The Wireless M-Bus standard (EN13757-4:2005) specifies the communication between water, gas, heat and electricity meters and concentrators. The standard comprises various operating modes (S, T and R) to meet the requirements of one-way and two-way data communication in stationary and mobile systems. The AMB8425-M is an all embedded low-cost wireless M-Bus radio module, which operates in 12 channels in the 868 MHz frequency band. The integrated protocol controls the entire data communication. Data packets are built and transmitted according to EN13757-4:2005 specification. Configuration of parameters is handled via the UART interface. The module automatically adds the Manufacturer ID and the Address based on parameters configured in the radio module. Measured field strength (RSSI value) offers the option of enhancing quality of the radio link. The customised application layer can be fully integrated in the radio module, thus eliminating the need for an external host microcontroller. The radio module supports the AES-128 encryption standard. A very low-power mode ensures long battery lifetime. The module is pre-certified for operation under the European radio regulations for license-free use. Due to its outstanding RF characteristics the module achieves a range* of up to 700 metres line of sight. The AMB8425-M is a surface-mounted module and is available on Tape &Reel for volume production. Interfaces The AMB8425-M is connected to a host system via an UART interface with data rates of up to 115.2 kbps. Alternatively, a SPI interface is offered (in preparation). When using appropriate firmware, the module is also suitable for autonomously recording digital or analogue signals. Other pins can be used for data flow control and to switch between operating modes. Range of Applications The radio module is designed for automatic meter reading applications for wireless data transmission according to the Wireless M-Bus specification (EN13757-4:2005). The radio module is designed to be integrated in meters, concentrators and mobile metering devices. Other applications are conceivable. Its compact dimensions and low- power consumption make the radio module ideal for battery-powered devices. AMB8426-M Dimensions & Pin Assignment Pad Name Description ANTENNA Antenna port GND Ground VCC Positive supply voltage UTXD, URXD UART transmit, UART receive SIMO Slave In Master Out (SPI in preparation) SOMI Slave Out Master In (SPI in preparation) SCLK SPI clock (SPI in preparation) /STE Slave Transmit Enable (SPI in preparation) /RESET Reset signal TX IND Signals radio transmission RX IND Signals radio reception MOD SELx wM-Bus mode preselect /RTS, /CTS Hardware handshake /DATA IND Signals incoming data RSVDx Reserved for future use TEST Used for programming purposes Specifications Performance Range* Up to 700 metres (depending on operating mode and antenna used) RF data rate 2.4 / 16.384 / 66.6 kbps (according to EN 13757-4:2005) Interface data rate Up to 115.2 kbps (UART) Output power Up to 11 dBm (50 ) RF sensitivity S: typ. -103 dBm T: typ. -100 dBm R: typ. -107 dBm General Power supply voltage 2.2 3.6 V Power consumption - TX: typ. 38 mA - RX: typ. 24 mA - Low Power: typ. < 0.3 A Dimensions 17 x 27 x 4 mm Operating temperature -30 to +85 C Weight approx. 3 g Antenna External antenna port (50 ) RF technology Frequency range 863.03 - 868.95 MHz Channel spacing 868.03 MHz + k 0.06 MHz k= 0,9 868.30 MHz 868.95 MHz Modulation 2-FSK Conformity Europe EN 300 220, EN 301 489, EN 60950, EN 50371 * Range stated is calculated assuming line-of-sight. Actual range will vary based upon specific board integration, antenna selection and environmental conditions. Related Products AMB8426-M-EV Evaluation-Kit Ordering information Contact AMBER wireless GmbH Part No. Description Albin-Koebis-Strasse 18 51147 Cologne, Germany AMB8426-M Wireless M-Bus Radio Module Tel.: +49 2203 98019 0 AMB8426-M-TR Wireless M-Bus Radio Module, Type & Reel Fax: +49 2203 98019 25 E-mail: info amber-wireless.de Internet: www.amber-wireless.de AMBER wireless GmbH assumes that the statements made in this data sheet are correct at the time of issue. AMBER wireless GmbH reserves the right to make changes to technical specifications or product functions without prior notice. AMBER wireless GmbH does not assume any responsibility for the use of the described products, neither does it convey any license under its patent rights. All trademarks, registered trademarks and product names are the property of their owners 2012 AMBER wireless GmbH AMB8426-M DS EN V1.2