Icp Rfu-900 User manual

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：1

User Manual

Version 1.0.0 Jan. 2018

RFU-900

(RS-232/RS-485 to LoRa Radio Modem)

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：2

Table of Contents

1. Introduction .........................................................................................................................4

1.1. Features..........................................................................................................................5

1.2. Specification....................................................................................................................6

2. Getting Started ....................................................................................................................7

2.1. LED Indicator..................................................................................................................8

2.2. Rotary Switch Setting......................................................................................................8

2.3. DIP Switch Setting ..........................................................................................................9

3. Software Utility..................................................................................................................10

3.1. Install the RFU-900 Utility .............................................................................................10

3.2. Setting up the RFU-900 ................................................................................................13

Appendix A. Dimensions.........................................................................................................18

Appendix B. Revision History.................................................................................................19

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：3

Important Information

Warranty

All products manufactured by ICP DAS are under warranty regarding

defective materials for a period of one year, beginning from the date of

delivery to the original purchaser.

Warning

ICP DAS assumes no liability for any damage resulting from the use of this

product.ICP DAS reserves the right to change this manual at any time

without notice. The information furnished by ICP DAS is believed to be

accurate and reliable. However, no responsibility is assumed by ICP DAS

for its use, not for any infringements of patents or other rights of third parties

resulting from its use.

Trademark

Names are used for identification purpose only and may be registered

trademarks of their respective companies.

If you encounter any problems while operating this device, feel free to contact us

via mail at: service@icpdas.com.

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：4

1. Introduction

The RFU-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 RFU-900 provides a maximum line of sight (LOS) transmission distance of 1000 meters (1

km) at an RF bit rate less than 1000 bps. In order to overcome the interference that may be

encountered in harsh environments, the RFU-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 RFU-900 networks are adjacent. The RF channels

and the Group IDs can be configured in order to distinguish and control the different RFU-900

networks.

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：5

1.1. Features

LoRa (Long Range) transmission technology

Transparent transmission mode

32 RF channels (Frequency band : 864~ 871.5MHz, 915~ 922.5MHz)

7 RF baud rates (10,000 ~ 250 bps)

Wireless line of sight (LOS) transmission range of up to 1500 meters at an RF baud rate

of 1000 bps

Provides baud bates from 1200 to 115200 bps for both the RS-232 and RS-485

interfaces

ESD Protection: Contact +/-4 kV

Isolation: 3000 VDC for DC-to-DC, 2500 Vrms using a photocoupler

DIN-Rail mountable

Operating temperature, -25 °C ~ +75 °C

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：6

1.2. Specification

RF Interface

Radio Frequency 864~ 871.5MHz, 915~ 922.5MHz

(channel: 32, recommend using 868 +/- 4 MHz)

Baud Rate 10000 ~ 250 bps

Transmission Power 15 dBm (Max.)

Antenna 2 dBi Omnidirectional Antenna

Transmission Distance up to 1500 m ( with 1000 baud, in free field conditions )

Group ID 0~255

Protocols Transparent transmit

Temporary Buffer Size 200 bytes

Configuration Dip /Rotary switch or Utility tool

COM Port Interface

RS-232 TxD, RxD and GND

RS-485 D+, D-

Baud Rate (bps) 1200 ~ 115200

Data Bit 5,6,7,8

Parity Bit NONE, EVEN, ODD

Stop Bit 1,2

Buffer

1024 bytes

LED Indicators

Red/ Green/ Yellow Power / RF TxD / RF RxD Status

EMS Protection

ESD +/- 4 kV Contact

EFT

+/- 1 kV

Surge +/- 1 kV

Power

Required Supply Voltage +10 VDC ~ +30 VDC

Power Consumption 1 W (Max.)

Mechanical

Dimensions (W x L x H) 108 mm x 84 mm x 33 mm ( not include antenna )

Installation DIN-Rail

Environment

Operating Temperature -25 °C ~ +75 °C

Storage Temperature -30 °C ~ +80 °C

Relative Humidity 10 ~ 90% RH, Non-condensing

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：7

2. Getting Started

Appearance

Pin Assignment

Pin Description

+Vs +10 ~ +30 VDC

GND Power Ground

D+ RS-485 Logic High

D- RS-485 Logic Low

F.G. Frame Ground

GND RS-232 Ground

TxD RS-232 Transmit Data Pin

RxD RS-232 Received Data Pin

LED Indicator

Antenna

Device ID

Removeable Terminal Block

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：8

2.1. LED Indicator

LED Behavior Description

PWR On +10 ~ +30 VDC Power On

Off Power Off

RF_Tx On RF is transmitting data

Off RF is no data to transmit

RF_Rx On RF is receiving data

Off RF is no data to receive

2.2. Rotary Switch Setting

Switch Name Description

Device

Device ID, 0x01 ~ 0xFE

NOTE:

Each module’s “Device ID”

must be

different from each other.

0x00 and

0xFF are reserved for

broadcast id used.

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：9

2.3. DIP Switch Setting

Pin Switch Name

Description

■

: ON

□

: OFF

1 ~ 3 COM0 Baud

Rate (bps)

Baud Rate 1 2 3

115200

□

57600

■

□

38400

□

■

□

19200

■

□

9600

□

■

4800

■

□

■

2400

□

■

1200

■

4 ~ 5

COM0 Data

Bit

Data Bit 4 5

□

■

□

■

6 ~ 7 COM0 Parity

Bit

Parity Bit 6 7

NONE

□

EVEN

■

□

ODD

□

■

Reserved

■

8 COM0 Stop

Bit

Parity Bit 8

□

■

Init / Run Mode

Init Mode:

able to use Utility to

configure via the RS-232

interface.

Run Mode:

Use to transmit data to the RF

side via COM 0 interface.

RFU-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：10

3. Software Utility

When users want to change the “Group ID”, “LoRa frequency”, “Module operation mode” of the

RFU-900, the RFU-900 Utility tool may be needed.

3.1. Install the RFU-900 Utility

Step 1: Get the RFU-900 Utility

The software is located at:

Usbcd:\napdos\rf_modem\utility\rfu-900\

http://ftp.icpdas.com/pub/cd/usbcd/napdos/rf_modem/utility/rfu-900/

Step 2:Install .NET Framework 3.5 component

The RFU-900 Utility tool requires the “.NET Framework 3.5 components”. If your PC’s

environment does not has “.NET Framework 3.5 components”, it will start to install .NET

Framework 3.5 components from the web site, after executing the “Setup.exe” file.

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