SC7202B Us er Ma nual
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best Industrial Co., Ltd Page2
Technical Parameters
Technical parameter
Parameter value
Brand
SONBEST
Temperature measurement range
-50°C to +100°C (optional with other ranges)
Detecting Core Devices
PT1000
Temperature Measurement Accuracy
±
0.3°C (optional ±0.3°C
Thermal Response Coefficient
10m
Ω
/K
The resistance of the sensor at 0 °C
1000
Ω
±0.12
Ω
/K
The resistance of the sensor at 0-100 °C
3.85
Ω
/K
Reference Execution Standards
Using EN 60751 Class B Standards
Channels
1
Wire
2-wire or 3-wire
Communication Interface
RS485
Default baud rate
9600 8 n 1
Power
AC185~265V 1A
Running temperature
-40~80°C
Working humidity
5%RH~90%RH
Wiring instructions
Any incorrect wiring can cause irreversible damage to the product. Please carefully wire the cable as
follows in the case of power failure, and then connect the cable to confirm the correctness and then use it
again.
ID
Core color
Identification
Note
1
Red
V+
Power +
2
Green
V-
Power -
3
Yellow
A+
RS485 A+
4
Blue
B-
RS485 B-
In the case of broken wires, wire the wires as shown in the figure. If the product itself has no leads, the
core color is for reference.
Communication Protocol
The product uses RS485 MODBUS-RTU standard protocol format, all operation or reply commands
are hexadecimal data. The default device address is 1 when the device is shipped, the default baud rate is
9600, 8, n, 1
1. Read Data (Function id 0x03)
Inquiry frame (hexadecimal), sending example: Query 1# device 1 data, the host computer sends the
command:01 03 00 00 00 01 84 0A .
Device ID
Function id
Start Address
Data Length
CRC16
01
03
00 00
00 01
84 0A
For the correct query frame, the device will respond with data:01 03 02 00 79 79 A6 , the response
format is parsed as follows:
Device ID
Function id
Data Length
Data 1
Check Code
01
03
02
00 79
79 A6
Data Description: The data in the command is hexadecimal. Take data 1 as an example. 00 79 is
