JXCT JXBS-3001-CO2 User manual

INSTRUCTION
MANUAL
CARBON DIOXIDE
TYPE RS485
JXBS-3001-CO2
VER1.1
Weihai JXCT Electronic Technology Co., Ltd.

I. Brief Introduction
1.1 Product Overview
THE CARBON DIOXIDE SENSOR uses the specialized carbon dioxide concentration sensor
probe as core detecting device, which has the characteristics of wide measurement range, high
precision, good linearity, good versatility, convenient using, easy installation, long transmission
distance and moderate price.
1.2 Primary Parameters
TABLE 1 Primary Parameters
PARAMETERS
TECHNICAL SPECIFICATIONS
MEASURING RANGE
5000ppm/1%/3%/65%/100%
POWER SUPPLY
12-24V DC
PRECISION
±(50ppm+3%Readings) (25℃)
AVERAGE CURRENT
<85mA
NON-LINEAR
<1%F·S
OUTPUT SIGNAL
RS485 Modbus
POWER
≤1W（@12V DC 25℃）
WARRANTY PERIOD
2 years ( Host ) / 1 year ( Sensor )
WORKING HUMIDITY ENVIRONMENT
0-95%RH
WORKING TEMPERATURE ENVIRONMENT
-10-50 ℃
PRESSURE RANGE
0.9-1.1atm
1.3 Probe Parameters And Selection
TABLE 2 Probe Parameters And Selection

NO.
RANGE
PRECISION
ANTI-HIG
H
HUMIDIT
Y
PREHE
AT
TIME
RESPON
SE TIME
5KN
5000ppm
±(50ppm+5%)
×
<120S
<30S
5KW
5000ppm
±(50ppm+5%)
√
<60S
<15S
1BW
1%
±(50ppm+5%)
√
<60S
<15S
3BW
3%
±(50ppm+5%)
√
<60S
<15S
65B
65%
±(50ppm+5%)
×
<30S
<15S
100B
100%
±(50ppm+5%)
×
<30S
<15S
1.4 System Frame Diagram
FIGURE 1 SINGLE-ENDED

FIGURE 2 MUTIPLE-ENDED
II. HARDWARE CONNECTIONS
2.1 Checking Before Installation
Check the list of devices before installation:
TABLE 3 List of Devices
Name
Number
THE SENSOR DEVICE
1

12V POWER ADAPTER（Optional）
1
THE USB TO 485 DEVICE（Optional）
1
WARRANTY CARD / CERTIFICATE
1
2.2 Interface Description
Before you wiring and use, please read this article in detail, Improper use may result in
irreversible damage to the product.
TABLE 4 Wiring Sequence
Line Color
Description
Power
Brown
Power supply Positive ( 12-24V DC )
Black
Power supply Negative
Communication
Yellow ( Gray )
485-A
Blue
485-B
We provide default cable length of 0.6 meters, you can extend the cable yourself according to your
needs.

2.3 Gas Detection Holes
The gas detection hole uses a polymer gas membrane to isolate the membrane. This membrane is
breathable and impermeable, and can function as a gas permeation but insulate moisture. Do not
destroy this membrane, otherwise it will affect the product life.
2.4 Installation Description
The equipment needs to be placed in an environment where there is no wind and no rain. The
equipment needs to be installed vertically. The device has two fixed holes with a spacing of
105mm. The size of each fixing hole is 3mm.
FIGURE 4 HOW FIXTURES
III. CONFIGURATION TOOL
INSTALLATION AND USE
We provide CONFIGURATION TOOL , which can be easily used to test our sensor device.
3.1 Sensor Access Computer
Transmitter can be connected to PC with the RS485 to USB adapter. You can check the COM port

number through Device Manager (right click My Computer).
3.2 How To Use Configuration Tool
Please note that this software can only test one device at the same time. After connecting the
physical device, click the CONNECT button to read the information. In the UNCONNET state,
you can modify BAUD and ADDR in COMMUNICATION SETTINGS.
Under the software, different check boxes can be selected according to different situations. For
example, you can choose the GAS option to test the RS485 OXYGEN SENSOR , you can choose
the NORMAL option to test the RS485 TEMPERATURE AND HUMIDITY SENSOR .
ⅣCOMMUNICATION PROTOCOL
4.1 Communication Basic Parameters
TABLE 5 Communication Basic Parameters
PARAMETERS
CONTENT
Protocol
Modbus RTU
Data bits
8 bit
Parity bit
No

Stop bit
1 bit
Error checking
CRC (redundant loop code)
Baud rate
2400 bps/ 4800 bps/ 9600 bps can be set
factory defaults to 9600 bps
For more information about MODBUS RTU please visit the website"www.modbus.org ".
4.2 Register Address
TABLE 6 Register Address
4.3 Communication example
4.3.1 Read Device Address 0x01's Carbon Dioxide Concentration
TABLE 7 Inquiry Frame
TABLE 8 Answer Frames
( For example, the reading is 18.9ppm )
Register
Address
Plc Configuration Address
Content
Operation
0000H
40001
Humidity ( Unit 0.1%RH)
Read-Only
0001H
40002
Temperature ( Unit 0.1℃)
Read-Only
0005H
40006
Carbon Dioxide ( unit 1ppm)
Read-Only
0100H
40101
Device Address (0-252)
R/W
0101H
40102
Baud Rate (2400/4800/9600)
R/W
Address Code
Function Code
Start Address
Data Length
CRC_L
CRC_H
0x01
0x03
0x00
0x05
0x00
0x01
0x94
0x0B

Address Code
Function Code
Returns to The
Number Of
Valid Bytes
Carbon Dioxide
Value
CRC_L
CRC_H
0x01
0x03
0x02
0x01
0xC3
0x78
0x35
Carbon Dioxide：
01C3 H ( hexadecimal ) =451=> Carbon Dioxide =451ppm
4.3.2 Read Device Address 0x01's Temperature And Humidity Value
TABLE 9 Inquiry Frame
TABLE 10 Answer Frame
Address
Code
Function
Code
Number Of Valid
Bytes
Humidity
Value
Temperature
Value
CRC_
L
CRC_
H
0x01
0x03
0x04
0x00
0xFE
0x00
0xAF
0xDB
0xBF
Temperature：
00AF H ( hexadecimal ) =175=> Temperature =17.5 ℃
Humidity：
00FE H ( hexadecimal ) =254=> Humidity =25.4%RH
4.3.3 Read Device Address 0x01's Temperature And Humidity,
Carbon Dioxide Concentration Value
TABLE 11 Inquiry Frame
Address Code
Function Code
Start Address
Data Length
CRC_L
CRC_H
0x01
0x03
0x00,0x00
0x00,0x02
0xC4
0x0B

Address Code
Function Code
Start Address
Data Length
CRC_L
CRC_H
0x01
0x03
0x00,0x00
0x00,0x06
0xC5
0xC8
TABLE 12 Answer Frame
Address Code
Function Code
Number Of Valid
Bytes
Humidity Value
Temperature Value
0x01
0x03
0x0C
0x03
0x14
0x01
0x1B
6 Useless Bytes
Carbon Dioxide
Value
CRC_L
CRC_H
0x00 ...
0x01
0xC3
0x50
0x3B
Temperature：
011B H ( hexadecimal ) =283=> Temperature =28.3 ℃
Humidity：
0314 H ( hexadecimal ) =788=> Humidity =78.8%RH
Carbon Dioxide：
01C3 H ( hexadecimal ) =451=> Carbon Dioxide =451ppm