JXCT JXBS-3001-TH-RS User manual

1/12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
JXBS-3001-TH-RS
Temperature Humidity Sensor
User Manual
RS485 Modubus
Version: 2.0
Date: 2020-1-1
Status: Released
www.jxct-iot.com

2/12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
I. BRIEF INTRODUCTION
1.1 Product Overview
This product adopts high sensitivity photosensitive probe, the signal is stable and the precision is high. It has
the characteristics of wide measurement range, good linear degree, good waterproof performance, convenient
use, easy installation and long transmission distance.
1.2 Primary Parameters
PARAMETERS
TECHNICAL SPECIFICATIONS
POWER SUPPLY
12-24V DC
POWER
0.4W
OUTPUT SIGNAL
RS485
RESPONSE TIME
≤15S
LONG-TERM STABLE TEMPERATURE
≤0.1℃/year
LONG-TERM STABILITY OF HUMIDITY
≤1%y
TEMPERATURE RANGE
-40℃-80℃
HUMIDITY RANGE
0-100%RH
TEMPERATURE RESOLUTION
0.1℃
HUMIDITY RESOLUTION
0.1%RH
POWER CONSUMPTION
≤0.15W(@12V DC , 25℃)
WORKING PRESSURE RANGE
0.9-1.1atm

3/12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
1.3 Probe Parameters and Selection
PRODUCT
TYPE
PROBE TYPE
TEMPERATURE
ACCURACY
HUMIDITY
ACCURACY
-S20
SHT20
±0.3℃
±3-7%
-S30
SHT30
±0.3℃
±2-4.5%
-S31
SHT31
±0.3℃
±2%
-S75
SHT75
±0.3℃
±1.5-3%
1.4 Temperature Parameters（-S20）
CONTENT
Minimum
Typical value
Maximum
Unit
Resolution（14bit）
-
0.01
-
℃
Linear deviation
-
±0.3
Figure 1
℃
Repeatability
-
±0.1
-
℃
The scope of work
-40
-
125
℃
Response time (63%)
5
-
30
secon
d
Long-term drift
-
<0.04
-
℃/yea
r
Figure 1 Temperature measurement accuracy at different temperatures
As shown in the above table, the maximum deviation is within ±0.5 in the range of 5-60 degrees Celsius, and the
deviation increases with less than 0 degrees Celsius and greater than 60 degrees Celsius.

4/12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
1.5 Humidity Parameter（-S20）
CONTENT
Minimum
Typical value
Maximum
Unit
Resolution（12bit）
-
0.04
-
%RH
Linear deviation
-
±3.0
Figure 2
%RH
Repeatability
-
±0.1
-
%RH
The scope of work
0
-
100
%RH
Response time (63%)
-
8
-
second
Long-term drift
-
<0.5
-
%RH /year
Hysteresis
-
±1
-
%RH
Non-linearity
-
<0.1
-
%RH
Figure 2 Humidity measurement accuracy under different humidity conditions
As shown in the above table, the deviation increases with a typical deviation of ±3% in the 20-80% RH range, less than
20%, and greater than 80% humidity.
1.6 Influence of temperature on humidity measurement（-S20）
Figure 2 describes the effects of different humidity conditions on the humidity measurement. The following table
describes the effects of different temperatures on the humidity measurement accuracy.

5/12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
Figure 3 Relative humidity at different temperatures
As shown in the above table, in the range of 15 to 55 degrees Celsius and 30 to 80 degrees of humidity, the accuracy of
humidity is the highest, which is ± 4.5%. In other cases, the humidity increases.
1.7 System frame Diagram
FIGURE 4 SINGLE-ENDED

6/12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
FIGURE 5 MUTIPLE-ENDED
II. HARDWARE CONNECTIONS
2.1 CHECKING BEFORE INSTALLATION
Check the list of devices before installation:
TABLE 1 List of Devices
Name
Number
THE SENSOR DEVICE
1
12V POWER ADAPTER（Optional）
1
WARRANTY CARD / CERTIFICATE
1
THE USB TO 485 DEVICE（Optional）
1
2.2 Interface Description
The power interface is wide voltage input 12-24V. When connecting the 485 signal cable, note that the A/B lines
cannot be reversed. The addresses of multiple devices on the bus cannot conflict.

7/12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
2.2.1 Economic Sensor Wiring
FIGURE 6 PHYSICAL PICTURE
TABLE 2 Wiring Sequence
Line Color
Description
Power
VCC
Power supply Positive ( 12-24V DC )
GND
Power supply Negative
Communication
485-A
485-A
485-B
485-B
Wiring method: After loosening the screw, insert the wire into the crimping hole from the terminal, and then tighten
the screw to lock the wiring material.
2.2.2 LCD display shell wiring

8/12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
FIGURE 7 PHYSICAL PICTURE
TABLE 3 Wiring Sequence
NO.
Instructions
NO.
Instructions
1
Power supply Positive（12-24VC）
5
485-A
2
Power supply Negative
6
485-B
7
Sensor Power supply Positive
3
SCL
8
Sensor Power supply Negative
4
SDA
Note: When the sensor is built in, 3/4/7/8 is idle.
Use a screwdriver to press down on the yellow buckle. Insert the wire into the crimping hole and release the
yellow buckle to lock the wire.
2.2.3 External Probe Sensor Wiring
FIGURE 8 PHYSICAL PICTURE
TABLE 4 Wiring Sequence
Line Color
Description
Power
Brown
Power supply Positive ( 12-24V DC )
Black
Power supply Negative
Communication
Yellow
485-A
Blue
485-B
Precautions: Please take care not to take the wrong line sequence, the wrong wiring will cause the equipment to
burn.

9/12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
The factory default is to provide 0.6 meters long wire rods. Customers can extend the wire rods as required
or sequentially.
Note that there are no yellow lines in the wire sequences that may be provided in some factory batches, in
which case the gray line is equivalent to replacing the yellow line.
2.3 Installation
The economical version of the sensor is in the form of a standard rail mount, which snaps the back side of the
sensor onto the rail.
The 86-shell wall-mounted large-screen sensor adopts the installation form of the inverted hoist hole, and the
customer can mount the screw with a distance of 60mm.
The wall-mounted king-shaped shell is a wall-mounted installation. The installation holes are located at the middle
positions on both sides of the device. The installation aperture is less than 4mm, and the hole distance is 105mm.
It can be installed using a 3mm self-tapping screw.

10 /12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
III. CONFIGURATION TOOL INSTALLATION
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

11 /12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
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 Soil Temperature And Humidity
TABLE 7 Inquiry Frame
TABLE 8
Answer Frames
Register Address
Plc Configuration
Address
Content
Operation
0000H
40001
Humidity(unit 0.1%RH)
Read-Only
0001H
40002
Temperature(unit 0.1℃)
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
0x00,0x00
0x00,0x02
0xC4
0x0B

12 /12
RS485 Modbus
JXBS-3001-TH--RS Temperature Humidity Sensor User Manual
Temperature: FF9BH ( hexadecimal ) =-101=> temperature =-10.1℃
Humidity: 292H( hexadecimal ) =658=>humidity =65.8%RH
Address
Code
Function
Code
Number Of Valid
Bytes
Humidity
Value
Temperature
Value
CRC_L
CRC_H
0x01
0x03
0x04
0x02, 0x92
0xFF, 0x9B
0x5A
0x3D