SONBEST SM1212B-12 User Manual

SM1212B-12 using the standard RS485 bus MODBUS-RTU protocol,easy access to PLC，DCS and
other instruments or systems for monitoring temperature,humidity@12 state quantities.The internal use of
high-precision sensing core and related devices to ensure high reliability and excellent long-term
stability,can be customized RS232,RS485,CAN,4-20mA,DC0~5V\10V,ZIGBEE,Lora,WIFI,GPRS and
other output methods.
Technical Parameters
Technical parameter
Brand
Temperature measuring range
Temperature measuring accuracy
Support sensor
Channels
Input bus
Humidity measuring range
Humidity accuracy
Communication Interface
Default baud rate
Power
Running temperature
Wiring instructions
Any incorrect wiring can cause irreversible damage to the product. Pleas e 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
1
2
3
4
In the case of broken wires, wire the wires as shown in the figure. If the product itself has no leads, the
best Industrial Co., Ltd
Sha nghai Son
SM1212B-12 Us er Ma nual
SM1212B-12
User Manual
File Version: V21.4.24
Core color
Red
Green
Yellow
Blue
http://www.sonbus.com/
Parameter value
SONBEST
-30℃~80℃
±0.5℃ @25℃
SHT20
12
IIC
0~100%RH
±3%RH @25℃
RS485
9600 8 n 1
DC9~24V 1A
-40~80° C
Identification
V+
V-
A+
B-
Note
Power +
Power -
RS485 A+
RS485 B-
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