RAK7431 RS485 to LoRaWAN Converter Version V1.2 | January, 2020 www.RAKwireless.com Visit our website for more document.
RAK7431 Table of Contents 1 Overview ................................................................................................................................................. 3 1.1 Introduction ...................................................................................................................................... 3 1.2 Main Features ..................................................................................................................................
RAK7431 1 Overview 1.1 Introduction RAK7431 is an RS485 to LoRaWAN™ converter designed for industrial applications. The device relays ModBUS data using the LoRaWAN™ network as means of wirelessly transmitting to and from the end devices. RAK7431 can operate in all of the LoRaWAN™ bands within the standard parameters defined by the LoRa® Alliance.
RAK7431 1.2 Main Features LoRaWAN™ 1.0.2 protocol stack, supports Class A & C Working modes: Polling mode, transparent mode and packet mode Remote cloud management of RS485 devices Can address up to 16 RS485, a que with up to 32 instruction sets Industrial grade STM MCU: ultra-low power (4uA sleep) and wide temperature range of operation. Wide range of input voltages, 8-48V DC input Can power RS485 devices via a dedicated output.
RAK7431 2 RAK7431 Networking Applications RAK7431 can convert the data of RS485 devices into LoRaWAN™ that can be sent to the cloud via a standard LoRaWAN™ Gateway. Cloud servers can also actively send data to RS485 terminals to achieve two-way data transmission. Using RAK7431, what used to be a costly and time-consuming cable line network deployment can be transformed into a rapid and cost-efficient wireless network deployment.
RAK7431 RAK7431 can work in polling mode in order to send query instructions to RS485 nodes, and convert the data returned into LoRa® frames to be relayed to the application server via a LoRaWAN™ Gateway. Figure 2 | RAK7431 polling mode RAK7431 can store a maximum of 32 query instructions in polling mode, each of which has a maximum length of 128 bytes. Polling time interval and waiting time can be adjusted as required.
RAK7431 Figure 3 | RAK7431 transparent mode 7
RAK7431 3 Interfaces Figure 4 | RAK7431 bottom panel Power supply and configuration interface: RAK7431 can be powered by its DC terminal or via its Micro USB port. The DC terminal accepts 8-48V DC input, and the rated power of the device is 1W. Pay attention to the positive and negative pole directions when crimping the terminal. Vin is connected to the positive pole of the power supply, and GND is connected to the negative pole of the power supply.
RAK7431 Figure 5 | RAK7431 ModBus connection diagram Reset key and indicator LED: Reset Key Press the reset key shortly to restart the system Red LED Power indicator (Only valid when using the USB power) Green LED System working indicator, flashing when there is data transmission 9
RAK7431 4 RAK7431 Specifications Parameter Value LoRaWAN™ Protocol LoRa Frequency LoRaWAN™ 1.0.2 RU864, IN865, EU868, US915, AU915, KR920, KR923 LoRaWAN™ Mode LoRa® Antenna interface Class A / Class C SMA MALE, External omnidirectional Antenna Configurable 9600 -115200bps 16 Nodes 18KV HBM protection 13KV IEC61000-4-2 contact discharge 4KV IEC61000-4-4 fast transient burst 8-48V Maximum 1W 8-48V Micro USB Power LED, Data LED Metal 93.6 x 100.
RAK7431 5 Installation RAK7431 allows for three installation methods: wall mounting, DIN rail installation and magnetic mounting. The wall installation and DIN rail installation is the standard installation mode (screw holes). The accessories required for magnetic mounting are optional.
RAK7431 FCC Caution: Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
RAK7431 6 7 Revision History Revision Description Date 1.0 Initial version 2019-10-09 1.1 Add detailed parameters 2019-12-27 1.2 Product naming and image update, naming errors, some inaccuracy in table data values 2019-01-13 Document Summary Prepared by Checked by Terry & Penn Terry & Vladislav Approved by About RAKwireless: RAKwireless is a pioneer in providing innovative and diverse Cellular and LoRaWAN connectivity solutions for both Edge and Gateway IoT devices.
