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The iU891A-XL is a compact and cost–effective USB stick based on the Long Range Radio Module iM891A-XL that operates in the unlicensed 868 MHz band. It  supports all major unidirectional and bidirectional wireless M-Bus modes (S, C, T and combined C/T) with packet formats A and B as well as the OMS security modes 5 and 7.

With an integrated +22 dBm power amplifier and a sensitivity of -149 dBm, a sensational link budget of approx. 170 dB can be reached. This makes the iM891A-XL an ideal solution for smart metering applications connecting water, heat, electricity and gas meters with data concentrators.

The external antenna provides an outstanding performance even in difficult RF environments.

Wireless M-Bus Gateway stack:

The Wireless M-Bus Gateway firmware has been design to allow remote monitoring and management of utility meters without the need for physical access to each individual meter.

The firmware collects data from the wireless M-Bus devices and for further processing and analysis in the corresponding central management system or database. It also provides additional functionalities such as data decryption (Mode 5 and 7), protocol conversion, and integration with other smart systems or IoT platforms.

Operating VoltageUSB (typ. 5 V)
Operating Temperature-40°C to +85°C
Dimensions (LxWxH)45,7 x 20,4 x 10,8 mm
RF Output Power (max.)+21 dBm (EIRP)