ICP DAS USA LRA-900 User manual

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：1
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
User Manual
Version 1.1.0 Sep. 2020
LRA-900
(RS-232/RS-485 to LoRa Radio Modem)

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.0 Page：2
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
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 LRA-900 Utility..............................................................................................10
3.2. Setting up the LRA-900.................................................................................................13
3.3. LRA-900 RSSI Test.......................................................................................................18
Appendix A. Dimensions.........................................................................................................20
Appendix B. Revision History.................................................................................................21

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.1 Page：3
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
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.
Copyright
Copyright @ 2018 by ICP DAS Co., Ltd. All rights are reserved.
Trademark
Names are used for identification purpose only and may be registered
trademarks of their respective companies.
Contact us
If you encounter any problems while operating this device, feel free to contact us
via mail at: [e-mail].

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.1 Page：4
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
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.

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.1 Page：5
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
1.1. Features
LoRa (Long Range) transmission technology
Transparent transmission mode
32 RF channels (Frequency band : 864~ 871.5MHz, 915~ 922.5MHz)
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 10,000 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

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.1 Page：6
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
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 10,000 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

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.1 Page：7
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
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

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.1 Page：8
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
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
ID
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.

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.1 Page：9
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
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
8
□
□
7
■
□
6
□
■
5
■
■
6 ~ 7 COM0 Parity
Bit
Parity Bit 6 7
NONE
□
□
EVEN
■
□
ODD
□
■
Reserved
■
■
8 COM0 Stop
Bit
Parity Bit 8
1
□
2
■
Init / Run Mode
Init Mode:
Be
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.

LRA-900 (RS-232/RS485 to LoRa Radio Modem) User Manual Version 1.0.1 Page：10
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: serv[email protected]
3. Software Utility
When users want to change the “Group ID”, “LoRa frequency”, “Module operation mode” of the
LRA-900, the LRA-900 Utility tool may be needed.
3.1. Install the LRA-900 Utility
Step 1: Get the LRA-900 Utility
The software is located at:
Usbcd:\napdos\rf_modem\utility\lra-900\
http://ftp.icpdas.com/pub/cd/usbcd/napdos/rf_modem/utility/lra-900/
Step 2:Install .NET Framework 3.5 component
The LRA-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.