Silicon Labs and IMST Wireless M-Bus Module for Smart Metering

The IMST iM871A wireless M-Bus module, based on Silicon Labs' Si10xx Wireless MCU technology offers a turnkey solution for smart metering applications connecting water, heat, electricity and gas meters with data concentrators in the 868 MHz frequency band. The comprehensive hardware/software solution combines IMST’s industry-leading expertise in the wireless M-Bus market with Silicon Labs’ Si10xx wireless microcontroller technology to simplify the deployment of ultra-low-power, high-performance, pre-certified wireless M-Bus modules for smart meters.

Using Silicon Labs’ high-performance Si1002 wireless MCU, the iM871A module can achieve a link budget up to 120 dB when operating in R2 mode, resulting in exceptional RF range and communications performance. This link budget is especially critical in addressing wireless communication requirements in challenging environments inside residential and commercial buildings.

Learn more about Silicon Labs' wireless M-Bus resources here.

Silicon Labs Si1002 Wireless MCU

The Si1000 wireless MCU, a member of the Si10xx wireless MCU family, combines a 25 MHz 8051 core, EZRadioPRO® sub-GHz RF transceiver, 64 kB of flash and a 10-bit ADC — all in a compact 5 mm x 7 mm package. The Si10xx family offers market-leading RF performance with the highest output power and sensitivity and lowest power wake-up transition. The industry’s most power-efficient wireless MCU solution, the Si10xx family provides the lowest current in common modes of operation (active, sleep and deep-sleep mode).

IMST iM871A Module

The iM871A module has an exceptionally small footprint (17 mm x 19 mm), comes equipped with a serial interface as well as analog and digital inputs and outputs to accommodate interfaces with a customer’s system, and is fully compliant with the EN 13757-4 standard. With a standby current of less than 1 microamp, the iM871A is well-suited for applications requiring long battery life such as water and gas meters. The iM871A module solution is compatible with a wide range of wireless M-Bus devices in the field. The module supports all major unidirectional and bidirectional wireless M-Bus modes (S1, S2, T1, T2 and R2) in addition to all tolerance specifications, enabling the highest possible flexibility in metering environments.

Wireless M-Bus Starter Kit

Quickly evaluate iM871A and Si1002 features and performance with this ready to run, out of the box starter kit.

Starter Kit includes:

  • Two Demo Boards
  • Two Specific Adapter Boards
  • Two Radio Modules
  • DLL for Windows®
  • Module (HCI) driver in ANSI-C
  • GUI
  • Antennas
  • Cables
  • Batteries

For more information about the iM871A Wireless M-Bus module, the Wireless M-Bus Starter Kit or to order module samples, visit www.wireless-solutions.de.


Click above to view the Extend Battery Life for Metering Solutions presentation.