BLIIoT S271 User manual

Cellular IoT M2M RTU
S271
User Manual
Version: V1.0
Date: 2021-11-25
Shenzhen Beilai Technology Co., Ltd
Website: https://www.bliiot.com

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Cellular IoT M2M RTU --- S270/S271
Preface
Thanks for choosing BLIIoT Cellular IoT M2M RTU. These operating instructions contain all the
information you need for operation of a device in the RTU S27 family.
Copyright
This user manual is owned by Shenzhen Beilai Technology Co., Ltd. No one is authorized to copy,
distribute or forward any part of this document without written approval of Shenzhen Beilai
Technology. Any violation will be subject to legal liability.
Disclaimer
This document is designed for assisting user to better understand the device. As the described
device is under continuous improvement, this manual may be updated or revised from time to time
without prior notice. Please follow the instructions in the manual. Any damages caused by wrong
operation will be beyond warranty.
Revision History
Revision Date
Version
Description
Owner
November 25th, 2021
V1.0
Initial Release
XJH

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Content
1 Introduction ................................................................................................................................................ 5
1.1 Overview .............................................................................................................................................5
1.2 Typically Applications ........................................................................................................................5
1.3 Safety Directions ............................................................................................................................... 6
1.4 Packing List ........................................................................................................................................ 7
1.5 Features ..............................................................................................................................................7
1.6 Technical Specifications................................................................................................................... 9
1.7 Model Selection ............................................................................................................................... 11
2 Hardware Specifications ........................................................................................................................11
2.1 Size ....................................................................................................................................................11
2.2 Interface ............................................................................................................................................ 12
2.2.1 Digital Input ............................................................................................................................... 12
2.2.2 LED Indicators .......................................................................................................................... 13
2.2.3 Digital Output ............................................................................................................................13
2.2.4 Analog Input .............................................................................................................................. 14
2.2.5 Temperature&Humidity ............................................................................................................15
2.2.6 Power&Switch&Mode Settings.............................................................................................. 15
2.2.7 SIM Card Slot........................................................................................................................... 15
3 Installation ................................................................................................................................................16
3.1 Wall mounted ................................................................................................................................... 16
3.2 DIN Rail mounting ........................................................................................................................... 16
4 Configuration ........................................................................................................................................... 17
4.1 Preparation before configuration .................................................................................................. 17
4.1.1 Install USB Driver .....................................................................................................................17
4.1.2 Check COM Port ...................................................................................................................... 18
4.1.3 Login Configuration Software .................................................................................................18
4.2 Basic Settings .................................................................................................................................. 19
4.3 Alarm Numbers Settings................................................................................................................ 20
4.4 Digital Output Settings ....................................................................................................................21
4.5 Access Control Settings ................................................................................................................. 23

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4.6 Input Settings ................................................................................................................................... 24
4.6.1 DI Setting ...................................................................................................................................24
4.6.2 DI Alarm Settings..................................................................................................................... 26
4.6.3 AI Setting ................................................................................................................................... 26
4.6.4 AI Alarm Settings ......................................................................................................................28
4.7 Timer Setting .................................................................................................................................... 29
4.8 Logic Trigger Setting .......................................................................................................................31
4.9 Cellular Network Settings ...............................................................................................................33
4.10 Historical Record...........................................................................................................................37
4.11 System ............................................................................................................................................ 38
4.13.1 Export Configuration File ......................................................................................................38
4.13.2 Load Configuration File .........................................................................................................38
4.14.3 Reset ........................................................................................................................................38
5 SMS Functions ........................................................................................................................................38
5.1 SMS Command List ........................................................................................................................ 39
6 Communication Protocols ..................................................................................................................... 43
6.1 Modbus RTU Slave Application .................................................................................................... 44
6.1.1 Read DO State......................................................................................................................... 44
6.1.2 Control DO ................................................................................................................................ 45
6.1.3 Read DI State........................................................................................................................... 47
6.1.4 Read AI, Tem&Hum, DI0, Power value ................................................................................ 48
7 Connect to Cloud Platform.................................................................................................................... 50
7.1 BLIIoT Modbus Cloud .....................................................................................................................50
7.2 BLIIoT MQTT Cloud ........................................................................................................................52
7.3 Huawei Cloud ...................................................................................................................................56
7.4 Ali Cloud ............................................................................................................................................59
7.5 Other IoT Server ..............................................................................................................................64
8 Device Register Address.......................................................................................................................65
9 Upgrade ....................................................................................................................................................67
10 Warranty Term...................................................................................................................................... 67
11 Technical Support ................................................................................................................................ 67

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1 Introduction
1.1 Overview
The Cellular IoT M2M RTU is an industrial class, high reliability, high stability, and programmable
Remote Terminal Unit (RTU). It embedded 32-Bit High Performance Microprocessor MCU, inbuilt
industrial Cellular module. The RTU features 4 digital inputs, 4 analog inputs, 4 relay outputs, 1
ambient sensor input for monitoring onsite temperature and humidity.
Users can set high and low limit according to different application scenarios, when alarm occurs, the
RTU will notify users by SMS, dialing, and also uploading data to cloud platform, monitoring center.
The RTU supports BLIIoT IoT RTU protocol, Modbus RTU over TCP protocol, Modbus TCP protocol,
MQTT protocol, which can communicate directly with the server, cloud platform or SCADA. It is a cost
effective IoT solution for industrial automation, security monitoring system, automatically
measurement and control system, BTS monitoring, remote data acquisition, telemetry systems,
automatically control system.
1.2 Typically Applications
BTS Monitoring, Security Alarm System applications, Supervision and monitoring alarm systems,
Automatic monitoring system, Vending Machines security protection, Pumping Stations, Tanks, Oil or
Water levels, Buildings and Real Estate, Weather Stations, River Monitoring and Flood Control, Oil
and gas pipelines, Corrosion protection, Temperatures, Water leakage applications, Wellheads, boat,
vehicle, Energy saving, street lights control system, Valve controls, Transformer stations, Unmanned
machine rooms, Control room application, Automation System, M2M, Access Control System, etc.

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1.3 Safety Directions
Safe Startup
Do not use the unit when using 4G equipment is prohibited or might bring disturbance
or danger.

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Interference
All wireless equipment might interfere network signals of the unit and influence its
performance.
1.4 Packing List
Please make sure below items are included in the package:
(Pictures are for reference only)
1xRTU, Wiring terminal, 1xMini USB, 1xSMA cellular antenna, 1xPower adaptor, DIN-Rail
mounting clip kit, Ejection Pin, Product qualification certificate, Warranty card
1.5 Features
4G network communication, can be operated from anywhere, no distance limitation;
Wide range power supply 12~36VDC with over voltage and phase-reversal protection;
Embedded ARM Cortex-M4 32 Bit RISC Core RTOS system, reliable performance with in-built
watchdog;
4 digital inputs, supports both dry contact and wet contact. Logic level: 10~30V or short circuit

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treated as close, 0~3V or open circuits treated as open. DIN0 as a high-speed pulse counter,
sampling frequency: 1MHz; DIN1~3 as low-speed pulse counter, DIN1 with arm and disarm
function;
4 relay output (5A@30VDC, 5A@250VAC), can auto control by timer, alarm-link and remote
control by SMS, cloud. The first DO can set time to control by authorize number;
1 temperature & humidity sensor input for monitoring onsite environment, temperatures range
from -40°C to 80°C, with a 0.5°C accuracy, humidity range from 0 to 100RH%, with a 3%
accuracy;
4 analog inputs, 12bits resolution, supports 0-5V, 0-20mA, 4-20mA output transducers;
Inbuilt 2M EEPROM to save up to 200 historical data and events;
Powerful SMS function
Inbuilt 1 DC output for external transducers to save wiring cost;
Automatically resend the data while communication interrupt or failure, and failure will alert by
SMS;
Supports remote restart by SMS commands;
10 SMS Alert and auto dial numbers for receiving alarm message, can program to receive
specified alarm message. The authorized numbers also can dial to open the door or turn on/off
machine at the specified time;
Inbuilt inter-lock logic programmer and powerful timer program function;
Support SMS, dial, 4G network for alert, USB port for configuration and upgrade firmware;
Embedded TCP/IP protocol stack, support TCP/UDP, MQTT, Modbus TCP, Modbus RTU over
TCP, BLIIoT IoT RTU protocol;
Metal case with IP30 protection grade, safely isolated from inner system, especially suitable for
industrial control application.
Small size: 127mmx88mmx30mm, support wall-mounting and DIN Rail mounting.

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1.6 Technical Specifications
Category
Parameter
Description
Power
Input Voltage
DC 12～36V
Power Consumption
Normal: 50mA@12V, Max: 150mA@12V
Output
1 Channel; Voltage: 12～36V DC;
Current: 1500mA@12V(Max)
Protection
Reverse wiring prevention; Surge: 4KV
Backup Battery
3.7V/900mA (It is optional. Default: Without battery)
USB
USB
1xMini USB
Digital Input
QTY
4 Channel
Type
Support both Wet contact and Dry contact
Dry Contact
Close: Short circuit; Open: Open circuits
Wet Contact
Close: 10~30V; Open: 0~3V
Others
DIN0 as a high-speed pulse counter, sampling
frequency: 1MHz; DIN1~3 as low-speed pulse counter,
anti-shake time can be set 1~2000ms, default 1ms;
DIN1 with arm and disarm function;
Protection
2KVrms
Digital Output
QTY
4 Channel
Type
Relay output (5A@30VDC, 5A@250VAC)
Others
The first DO can set time to control by authorize
number; Custom setting close and open times
Protection
2KVrms
Analog Input
QTY
4 Channel
Type
Single-ended input, 4-20mA/0-20mA/0-5V
Resolution
12Bit
Accuracy
±0.1% FSR @ 25°C
±0.3% FSR @ -10 and 60°C
±0.5% FSR @ -40 and 75°C
Sampling Rate
200ms
Input Impedance
>1M ohms
Temperature&
Humidity
(AM2301)
Resolution
16bit(0.1%RH, 0.1°C)
Sampling Rate
200ms
Temperature Range
-40 to +80°C
Accuracy
0.5°C
Humidity Range
0 to 99RH%
Accuracy
3%RH
4G
SIM
Drawer type, Support 1.8V/3V SIM/UIM card, Built-in

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15KV ESD protection
SIM Slot
1
L-E Version
GSM/EDGE:900,1800MHz
WCDMA:B1,B5,B8
FDD-LTE:B1,B3,B5,B7,B8,B20
TDD-LTE:B38,B40,B41
L-CE Version
GSM/EDGE:900,1800MHz
WCDMA:B1,B8
TD-SCDMA:B34,B39
FDD-LTE:B1,B3,B8
TDD-LTE:B38,B39,B40,B41
L-A Version
WCDMA:B2,B4,B5
FDD-LTE:B2,B4,B12
L-AU Version
GSM/EDGE:850,900,1800MHz
WCDMA:B1,B2,B5,B8
FDD-LTE:B1,B3,B4,B5,B7,B8,B28
TDD-LTE:B40
L-AF Version
WCDMA:B2,B4,B5
FDD-LTE:B2,B4,B5,B12,B13,B14,B66,B71
CAT-1 Version
GSM:900,1800
FDD-LTE:B1,B3,B5,B8
TDD-LTE:B34,B38,B39,B40,B41
Software
Internet Protocol
IPV4, TCP/UDP, Modbus RTU, Modbus TCP, MQTT,
BLIIoT IoT RTU
Indicator
4G signal, running, arming and disarming
Configuration
PC software configuration, support WIN XP, WIN 7,
WIN 8 and WIN 10
Transparent
Transmission
Support
SMS Command
Support
Login Package
Support custom login package
Heartbeat Package
Support custom heartbeat package
Storage
Capable of storing up to 200 historical records
Environment
Working
-45～85°C, 5～95% RH
Storage
-45～105°C, 5～95% RH
Others
Shell
Metal
Size
127x88x30mm
Protection
IP30
Installation
DIN Rail mounting, Wall-mounted.

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1.7 Model Selection
Model
DI
AI
DO
Tem&
Hum
Storage
USB
RS485
I/O data points
bool
16Bit
32Bit
64Bit
S270
2
2
2
1
2M
1
x
x
x
x
x
S271
4
4
4
1
2M
1
x
x
x
x
x
2 Hardware Specifications
2.1 Size

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2.2 Interface
2.2.1 Digital Input
Digital Input
Function
Description
DI0
First channel of Digital input, support high speed pulse counting, sampling
frequency: 1MHz
DI1
Second channel of Digital input, support low speed pulse counting, support used
as arming and disarming input

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DI2
Third channel of Digital inpu
DI3
Fourth channel of Digital input
COM
Common grounding
COM
Common grounding
Dry
DI switch to Dry contact
Wet
DI switch to Wet contact
Note: DIN0 as a high-speed pulse counter, sampling frequency: 1MHz; DIN1~3 as low-speed pulse
counter, anti-shake time can be set 1~2000ms, default 1ms;
Diagram of DI internal interface:
2.2.2 LED Indicators
LED Indicators
Symbol
Name
Color
State
Description
4G signal
GREEN
Flickering
Normal(Light Off for 0.2s, ON for 2s)
No signal(Light Off for 2s, ON for 0.2s)
Alarm
Alarm
RED
Always ON
Triggered alarm
OFF
No alarm
Run
Run
RED
Flickering
System is running
OFF
System stop running
Arm
Arm
RED
Always ON
Armed
OFF
Disarmed
2.2.3 Digital Output
Digital Output
Functions
Description
DO0+
First channel of Digital output
DO0-
First channel of Digital output
DO1+
Second channel of Digital output

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DO1-
Second channel of Digital output
DO2+
Third channel of Digital output
DO2-
Third channel of Digital output
DO3+
Fourth channel of Digital output
DO3-
Fourth channel of Digital output
Diagram of DO internal interface:
2.2.4 Analog Input
Mode selection(DIP Switch)
Functions
Description
V
Switch to "V" indicate that the analog input type is "0-5V"
mA
Switch to "mA" indicate that the analog input type is "0-20mA" or "4-20mA"
A0-A3
Corresponding to the analog input of each channel
Note: According to the output type of the transmitter(mA or V), switch the DIP switch of the
corresponding channel to the corresponding position on the device.
Analog Input
Functions
Description
AI0
First channel of Analog input positive interface
AI1
Second channel of Analog input positive interface
AI2
Third channel of Analog input positive interface
AI3
Fourth channel of Analog input positive interface
GND
Common grounding
GND
Common grounding
Diagram of AI internal interface:

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2.2.5 Temperature&Humidity
RS485 and Temperature&Humidity
Functions
Description
VCC
Power supply interface of Tem &Hum sensor(AM230x/AM240x)
DATA
Data interface of Tem &Hum sensor(AM230x/AM240x)
GND
Grounding of Tem &Hum sensor(AM230x/AM240x)
2.2.6 Power&Switch&Mode Settings
Power&Switch
Functions
Description
VIN+
12-36V Power input positive
VIN-
12-36V Power input negative
VOUT+
12-36V Output positive
VOUT-
12-36V Output negative
OFF
Device shutdown
ON
Device startup
USB
Used to connect configuration software, set parameters, and
upgrade
Configuration Switch
Functions
Description
SET
Switch to SET to enter configuration mode when configuring
RUN
When configuring is complete, switch to RUN to enter the running
mode.
2.2.7 SIM Card Slot
When inserting/removing the SIM card, please turn off the device.

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Note: Please place the device flat when inserting/removing the SIM card.
3 Installation
3.1 Wall mounted
3.2 DIN Rail mounting

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4 Configuration
4.1 Preparation before configuration
Please follow the steps
1) Insert the SIM Card;
2) The device must be configured in [SET] mode, switch to [SET] before configuration;
3) Connect the device to an external power and power on, switch the power switch to ON.
4) Connect the RTU to PC by USB cable, and install the USB Driver to the computer;
5) Open configuration software, choose the correct COM port and fill in the password(Default:
1234), select Normal SIM card mode to enter configuration software;
6) Open parameter setting page---->Click "Read" button to get device current value--->After
modifying or setting the parameters---->Click the "Save" button to saving parameters in device;
7) If you need to program bulks of RTU with similar parameters, you can [Export Configuration File],
and then [Load Configuration File] to the next device to complete the settings quickly;
8) Power off the device when configuration is complete, switch the power switch to OFF;
9) Switch to [RUN] mode after power off the device;
10) Reboot the device, then the device will enter into normal running mode.
4.1.1 Install USB Driver
Install the USB Driver to the computer firstly. When successful, it can be found out at the device
manager of the XP or Windows 7 or Win8/Win10. Also, the driver for different OS can be downloaded
from Silicon Laboratories, Inc. http://www.silabs.com , the model is CP210x.

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4.1.2 Check COM Port
Choose the correct "COM port" when entering configuration software.
4.1.3 Login Configuration Software
Choose the correct port, then fill in the password to login configuration software
The login password is 1234
Click "Read" button to get device current parameters first
Click "Save" button to saving parameters in device

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4.2 Basic Settings
Modify Password
Item
Description
Default
Old password
Enter the old password
Empty
New password
Enter the new password
Empty
Confirm password
Confirm the password
Empty
Modify password
Password modification takes effect
--
Synchronous machine time
Item
Description
Default
Time
Current time on device
--
Time zone
Current time zone on computer
--
Sync time
Time on computer is synchronized with RTU
--
Read time
Read the current time
--
Basic information
Item
Description
Default
Device ID
Modbus device ID address, range: 1-247
1
Model No.
Device model number
--
Version
Device version
--
IMEI
Device serial number
--
Device description
The alarm message will include device description
Empty

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information.
Add timestamp to
alarm SMS
Alarm message will include the time
Check
Arm automatically
when power on
RTU will enter into Arm mode automatically once
the RTU powered on
Check
Auto arm after
disarm
RTU will change to arm mode automatically after
a certain period after disarm
Check
Timer reporting SMS content settings
Item
Description
Default
Add the following additional
information in the report
SMS
Check the related item to add its
value/status to the Timer report text
message.
Uncheck
Alarm SMS content settings
Item
Description
Default
Add the following additional
information in the alarm
SMS
Check the related item to add its
value/status to the alarm text message.
Uncheck
4.3 Alarm Numbers Settings
When device connect to cloud platform, it may be frequently offline due to sending text message,
receiving text message and dialing. We don't suggest you use SMS alarm if RTU need to be
connected to cloud platform.