Wall-mounted temperature and humidity transmitter with Output RS485(THM100-11M-YC)0 pages

Stock Code:430519

Stock Code:430519

Wall-Mounted temperature and humidity transmitter with output R S485 (THM100-11M-YC)
The wall-mounted temperature and humidity transmitter with
output RS485 adopts the imported high quality digital temperature sensor . It can reliably collect and distribute and control the
signals with epistatic machine system.
Its major features are small size, light weight, wide measuring
range, high precision, fast response and long-term stability,
which makes it widely used in meteorology, national defense,
scientific research, post and communications, chemical indus-

Sending and Receiving Data Command Format
Host sending terminal
E.g. 01 03 00 00 00 02 CRCL CRCH
The first byte device address
The second byte function code (0×03)---(read holding registers)
The third byte data starting address (0×00)---(high byte)
The fourth byte data starting address(0×02)---(low byte)
The fifth byte data number (0×00)---(high byte)
The sixth byte data number (0×02)---(low byte)
The seventh byte CRCL---16 bits CRC check low byte
The eighth byte CRCH---16 bits CRC check high byte

try, environmental protection, medicine, hotel, food and logistic
storages, HVAC and various kinds of areas which are needed
to measure and control the temperature and humidity of the
air.

Technical data
Operating voltage4VDC
Operating environmentHumidity

Temperature calculation method

95%RH, Temperature -20~+80

1.Determine the highest digits of temperature integer bits of low byte.when it equals to 0, it is positive temperature ; when it equals to 1, it

Input SignalSHT digital temperature and humidity sensor
Temperature Measuring range -40

Slave returning terminal
E.g. 0×01 0×03 0×04 0×00 0×14 0×00 0×52 0x00 0x3F 0X00
0X05 CRCL CRCH
The first byte device address
The second byte function code (0×03)
The third byte data byte number (0×08)---return to 8 data bytes
The fourth byte temperature integer bit high byte(0×00)
The fifth byte temperature integer bit low byte
The sixth byte temperature decimal places high byte(0×00)
The seventh byte temperature decimal places low byte
The eighth byte humidity integer bit high byte(0×00)
The ninth byte humidity integer bit low byte
The tenth byte humidity decimal places high byte(0×00)
The eleventh byte humidity decimal places low byte
The twelfth byte CRCL--16 bits CRC check low byte
The thirteenth byte CRCH---16 bits CRC check high byte

means negative temperature. It starts to calculate after choosing the highest digits of temperature integer bits of low byte contrary.

+120

2.Temperature value =temperature integer bits after processing + temperature decimal places divided by 100

Humidity Measuring range0~100%RH

3.Humidity value=humidity integer bits +humidity decimal places divided by 100

Output SignalRS-485 communication,Modbus RTU
Load Capacity500ᴒ

Physical Interface

Information transmission starting bit 1 bit, data bit 8bits, parity check ,stop bit 1 bit

RS-485 Wiring Diagram

Baud rate range 1200 2400 4800 9600
Device address range 1~32
Factory default baud rate 1200 address01
Address, Baud rate setting use the accessary serial debugging software, pick ModbusRTU,choose check CRC16(ModbusRTU),input
A

Yellow

B

Blue

GND

Brown

VCC

Pink

and display HEX format.
Change parameter command format 00 16+Baud rate+Device Address
E.g change Baud rate to 9600,device address is NO.32 ,debugging software
Sending 00 16 96 20
Returning 00 16 04 96 20 CRCL CRCH Error ! No found reference source
Among 00 16 changing command
04 return to 4 bytes

Note
VCC--Power Supply +
GND--Power Supply-/mA-

20 device address setting NO.32
96 Baud rate 9600
CRCL 16 bits CRC Check low byte
CRCH 16 bits CRC Check high byte
Note It is necessary to know the current baud rate before changing.
After changing, power on again. It works.

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