Introduction - ICP DAS USA LRA-900 User Manual

1. Introduction

The LRA-900 is a RS-232/RS-485 to radio device designed for remote communication operating
in a transparent way and exploiting the physical layer of LoRa (Long Range) transmission
technology.
The LRA-900 provides a maximum line of sight (LOS) transmission distance of 1000 meters (1
km) at an RF bit rate 10,000 bps. In order to overcome the interference that may be encountered
in harsh environments, the LRA-900 allows the RF transmission bit rate to be configured to a
minimum of 250 bps, enhancing the capability of the modem to resist noise and other
interference. Additionally, the RF channels and Group IDs are adjustable, which is helpful to
avoid interference encountered when two LRA-900 networks are adjacent. The RF channels and
the Group IDs can be configured in order to distinguish and control the different LRA-900
networks.
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LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.1 Page：
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