2AF6B-RAK7431RS485 to LoRaWAN Converter

RAK7431 RS485 to LoRaWAN Converter Version V1.2 | January, 2020 www.RAKwireless.com Visit our website for more document. RAK7431 2 Table of Contents 1 Overview ................................................................................................................................................. 3 1.1 Introduction ...................................................................................................................................... 3 1.2 Main Features .................................................................................................................................. 4 2 RAK7431 Networking Applications ...................................................................................................... 5 3 Interfaces ................................................................................................................................................ 8 4 RAK7431 Specifications ...................................................................................................................... 10 5 Installation ............................................................................................................................................ 11 6 Revision History ................................................................................................................................... 13 7 Document Summary ............................................................................................................................ 13 RAK7431 3 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. Its open environment range is 15+km and in industrial cases, where there are heavy obstructions in the path of the RF signal performance is improved compared to conventional wireless systems due to the characteristics of LoRa® as a modulation technique. This allows for consistently good signal quality within the confines of large factories, densely populated offices, storehouses, etc. This RS485 compatible devices can address up to 16 client terminal nodes. The conversion from and to LoRa® frames is seamless and allows for real time control and monitoring of multiple RS485 devices. bus data to access and control the RS485 terminal nodes. RAK7431 together with RAK's LoRaWAN™ gateway and LoRa® Server products, can easily and quickly build a wireless industrial field control system. RAK7431 adopts industrial protection design, supports wide range voltage supply, supports wall mounting and DIN rail installation, facilitates field installation and use. RAK7431 4 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.  Mounting: Wall, DIN rail, and magnetic mounting  Compliant with IEC61000-4-2, IEC61000-4-4 and 18KV HMB ESD protection  RAK7431 5 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. An example would be using the RAK7249 LoRaWAN™ Gateway coupled with the RAK WisDM cloud management platform, in order to realize an end-to -end industrial field data acquisition and control system. Using the built-in LoRa® Server, that comes standard with any RAK LoRaWAN™ Gateway, one could seamlessly achieve transmission of the end device data to any application server. Furthermore, the MQTT integration allows for a high level of security and efficiency. Figure 1 | RS485 to LoRaWAN™ network structure RAK7431 6 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 converts the data returned by RS485 nodes into LoRa® packets that can be sent to LoRaWAN™ Gateway in two ways: transparent or packet. • In transparent mode, RS485 data is encapsulated in the payload of LoRa® frames as it is. • In packet mode, RS485 data is encapsulated in LoRa® frames with the addition of a header and verification. No matter whether polling mode is enabled or not, the server can actively send commands to query the RS485 nodes through the LoRaWAN™ Gateway via the RAK7431. The commands issued and the returned data can also be transmitted in transparent mode or in packet mode. RAK7431 7 Figure 3 | RAK7431 transparent mode RAK7431 8 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. The Micro USB port can also be used for powering the device (5V / 500mA DC). At the same time, the Micro USB port can …

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Shenzhen Rakwireless Technology Co., Ltd. Address: Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town Nanshan District, Shenzhen, China Email: [email protected] Tel: +8675586152201 Extension: 803 Date: 2020-06-04 To: FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern: The RF chip, model SX1276, which installed in our product RS485 to LoRaWAN Converter, Model: RAK7431, FCC ID: 2AF6B-RAK7431 supports 137-1020MHz. For use in America and this chip only support 903-927.5 MHz, 902.3-914.9 MHz. The other bands was disabled by the manufacturer in the software. The end user has no capability to activate it. Sincerely Yours, Signature: duiyu ye Title: Engineer

Shenzhen Rakwireless Technology Co., Ltd. Address: Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town Nanshan District, Shenzhen, China Email: [email protected] Tel: +8675586152201 Extension: 803 Date: 2020/06/04 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir or Madam: We Shenzhen Rakwireless Technology Co., Ltd. hereby declare that The LoRa Module, model RAK4200(H), which installed in our product RS485 to LoRaWAN Converter, Model: RAK7431, FCC ID: 2AF6B-RAK7431 is the same as the tested LoRa Module with FCC ID: 2AF6B-RAK4200H. We confirm that all information above is true, and we’ll be responsible for all the consequences. Please contact me if you have any question. Sincerely Yours, Signature: duiyu ye Title: Engineer

Shenzhen Rakwireless Technology Co., Ltd. Address: Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town Nanshan District, Shenzhen, China Email: [email protected] Tel: +8675586152201 Extension: 803 FCC Confidential Authorization 2020-06-04 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2AF6B-RAK7431 In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, (Shenzhen Rakwireless Technology Co., Ltd. ) hereby requests long-term confidential treatment of information accompanying this application as outlined below: • Block Diagram • Schematics • Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely, Signature: duiyu ye Title: Engineer

QA-FR-170-B Shenzhen Rakwireless Technology Co., Ltd. Address: Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town Nanshan District, Shenzhen, China Email: [email protected] Tel: +8675586152201 Extension: 803 FCC Authorization 2020-06-04 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We ( Shenzhen Rakwireless Technology Co., Ltd.), the undersigned, hereby authorize Bay Area Compliance Laboratories Corporation to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratory Corporation on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely, Signature: duiyu ye Title: Engineer

EXHIBIT B - EUT EXTERNAL PHOTOGRAPHS

EXHIBIT A - FCC ID LABEL AND LOCATION FCC ID Label FCC ID Label Location Information The label shown shall be permanently affixed at a conspicuous location on the device and be readily visible to the user at the time purchase (Labeling requirements per 2.925)

EXHIBIT C - EUT INTERNAL PHOTOGRAPHS

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ200511003-00B FCC Part 15.247 Page 9 of 24 FCC §15.247 (i) & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE) Applicable Standard According to subpart 15.247 (i) and subpart 2.1091 systems operating under the provisions of this section shall be operated in a manner that ensures the public is not exposed to RF energy level in excess of the communication guidelines. Limits for General Population/Uncontrolled Exposure Limits for General Population/Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (V/m) Magnetic Field Strength (A/m) Power Density (mW/cm 2 ) Averaging Time (Minutes) 0.3-1.34 614 1.63 *(100) 30 1.34-30 824/f 2.19/f *(180/f 2 ) 30 30-300 27.5 0.073 0.2 30 300-1500 / / f/1500 30 1500-100,000 / / 1.0 30 f = frequency in MHz * = Plane-wave equivalent power density Result Calculated Formulary: Predication of MPE limit at a given distance S = 2 4R PG π S = power density (in appropriate units, e.g. mW/cm2) P = power input to the antenna (in appropriate units, e.g., mW). G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain factor, is normally numeric gain. R = distance to the center of radiation of the antenna (appropriate units, e.g., cm) Frequency (MHz) Antenna Gain Tune up conducted power Evaluation Distance (cm) Power Density (mW/cm 2 ) MPE Limit (mW/cm 2 ) (dBi) (numeric) (dBm) (mW) 903 3.0 2.0 20.0 100.0 20 0.04 0.602 Note: To maintain compliance with the FCC’s RF exposure guidelines, place the equipment at least 20cm from nearby persons. Result: Compliance

Note: This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA* or any agency of the Federal Government. This report may contain data that are not covered by the A2LA accreditation and are marked with an asterisk “★”. BACL is not responsible for the authenticity of any test data provided by the applicant. Data included from the applicant that may affect test results are marked with an asterisk ’*’. Customer model name, addresses, names, trademarks etc. are not considered data. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. FCC PART 15.247 TEST REPORT For Shenzhen Rakwireless Technology Co., Ltd. Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town Nanshan District, Shenzhen, China FCC ID: 2AF6B-RAK7431 Report Type: Original Report Product Type: RS485 to LoRaWAN Converter Re port Number: RSZ200511003-00B Re port Date: 2020-06-18 Reviewed B y: Jacob Kong RF Engineer Prepared By: Bay Area Compliance Laboratories Corp. (Shenzhen) 6/F., West Wing, Third Phase of Wanli Industrial Building, Shihua Road, Futian Free Trade Zone, Shenzhen, Guangdong, China Tel: +86-755-33320018 Fax: +86-755-33320008 www.baclcorp.com.cn Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RSZ200511003-00B FCC Part 15.247 Page 2 of 24 TABLE OF CONTENTS GENERAL INFORMATION ....................................................................................................................................... 3 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 3 OBJECTIVE ................................................................................................................................................................... 3 RELATED SUBMITTAL(S)/GRANT(S) ............................................................................................................................. 3 TEST METHODOLOGY .................................................................................................................................................. 3 MEASUREMENT UNCERTAINTY .................................................................................................................................... 4 SYSTEM TEST CONFIGURATION .......................................................................................................................... 5 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 5 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 5 EUT EXERCISE SOFTWARE .......................................................................................................................................... 5 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 5 EXTERNAL I/O CABLE .................................................................................................................................................. 5 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 6 SUMMARY OF TEST RESULTS ............................................................................................................................... 7 TEST EQUIPMENT LIST ........................................................................................................................................... 8 FCC §15.247 (i) & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE) .......................................................... 9 APPLICABLE STANDARD .............................................................................................................................................. 9 RESULT ........................................................................................................................................................................ 9 FCC §15.203 - ANTENNA REQUIREMENT ........................................................................................................... 10 APPLICABLE STANDARD ............................................................................................................................................ 10 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 10 FCC §15.207 (a) – AC LINE CONDUCTED EMISSIONS ..................................................................................... 11 APPLICABLE STANDARD ............................................................................................................................................ 11 EUT SETUP ................................................................................................................................................................ 11 EMI TEST RECEIVER SETUP ....................................................................................................................................... 11 TEST PROCEDURE ...................................................................................................................................................... 11 CORRECTED FACTOR & MARGIN CALCULATION ....................................................................................................... 12 TEST RESULTS SUMMARY ...............................................................................................…

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Note: This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA* or any agency of the Federal Government. This report may contain data that are not covered by the A2LA accreditation and are marked with an asterisk “★”. BACL is not responsible for the authenticity of any test data provided by the applicant. Data included from the applicant that may affect test results are marked with an asterisk ’*’. Customer model name, addresses, names, trademarks etc. are not considered data. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. FCC PART 15.247 TEST REPORT For Shenzhen RAKwireless Technology Co., Ltd. Room 506, Bldg B, New Compark, Pingshan First Road, Taoyuan Street, XiLi town Nanshan District, Shenzhen, China FCC ID: 2AF6B-RAK4200H Report Type: Original Report Product Type: LoRa Module Report Number: RGMA190904002-00B Report Date: 2020-04-20 Reviewed By: Jimmy Xiao RF Engineer Prepared By: Bay Area Compliance Laboratories Corp. (Shenzhen) 6/F., West Wing, Third Phase of Wanli Industrial Building, Shihua Road, Futian Free Trade Zone, Shenzhen, Guangdong, China Tel: +86-755-33320018 Fax: +86-755-33320008 www.baclcorp.com.cn Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: RGMA190904002-00B FCC Part 15.247 Page 2 of 32 TABLE OF CONTENTS GENERAL INFORMATION ....................................................................................................................................... 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 4 OBJECTIVE ................................................................................................................................................................... 4 RELATED SUBMITTAL(S)/GRANT(S) ............................................................................................................................. 4 TEST METHODOLOGY .................................................................................................................................................. 4 MEASUREMENT UNCERTAINTY .................................................................................................................................... 5 SYSTEM TEST CONFIGURATION .......................................................................................................................... 6 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 6 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 6 EUT EXERCISE SOFTWARE .......................................................................................................................................... 6 DUTY CYCLE ................................................................................................................................................................ 7 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 7 EXTERNAL I/O CABLE .................................................................................................................................................. 7 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 8 SUMMARY OF TEST RESULTS ............................................................................................................................... 9 TEST EQUIPMENT LIST ......................................................................................................................................... 10 FCC §15.247 (i) & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE) ........................................................ 11 APPLICABLE STANDARD ............................................................................................................................................ 11 RESULT ...................................................................................................................................................................... 11 FCC §15.203 - ANTENNA REQUIREMENT ........................................................................................................... 12 APPLICABLE STANDARD ............................................................................................................................................ 12 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 12 FCC §15.207 (a) – AC LINE CONDUCTED EMISSIONS ..................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................................ 13 EUT SETUP ................................................................................................................................................................ 13 EMI TEST RECEIVER SETUP ....................................................................................................................................... 13 TEST PROCEDURE ...................................................................................................................................................... 13 CORRECTED FACTOR & MARGIN CALCULATION ....................................................................…

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EXHIBIT D - TEST SETUP PHOTOGRAPHS Powered from mirco USB port Conducted Emissions - Front View Conducted Emissions - Side View Radiated Emissions View (Below 1 GHz) Powered from DC input port Conducted Emissions - Front View Conducted Emissions - Side View Radiated Emissions View (Below 1 GHz) Radiated Emissions View (Above 1 GHz)