Wall-mounted temperature transmitter with Output 4-20mA(THM100-02M-YC)0 pages

Stock Code:430519

Stock Code:430519

Wall-mounted temperature transmitter with Output RS485 (THM 100-02M-YC)

Sending and Receiving Data Command Format

storages, HVAC and various kinds of areas which are needed

The sixth byte temperature decimal places high byte(0×00)
The seventh byte temperature decimal places low byte

The eighth byte CRCH---16 bits CRC check high byte

try, environmental protection, medicine, hotel, food and logistic

The fifth byte temperature integer bit low byte

The seventh byte CRCL---16 bits CRC check low byte

scientific research, post and communications, chemical indus-

The fourth byte temperature integer bit high byte(0×00)

The sixth byte data number (0×02)---(low byte)

which makes it widely used in meteorology, national defense,

The third byte data byte number (0×08)---return to 8 data bytes

The fifth byte data number (0×00)---(high byte)

range, high precision, fast response and long-term stability,

The second byte function code (0×03)

The fourth byte data starting address(0×02)---(low byte)

Its major features are small size, light weight, wide measuring

The first byte device address

The third byte data starting address (0×00)---(high byte)

epistatic machine system.

E.g. 0×01 0×03 0×04 0×00 0×14 0×00 0×52 CRCL CRCH

The second byte function code (0×03)---(read holding registers)

can reliably collect and distribute and control the signals with

Slave returning terminal

The first byte device address

adopts the imported high quality digital integrated sensor . It

Host sending terminal
E.g. 01 03 00 00 00 02 CRCL CRCH

The wall-mounted temperature transmitter with output RS485

The eighth byte CRCL--16 bits CRC check low byte
The ninth byte CRCH---16 bits CRC check high byte

to measure and control the temperature of the air.

Technical data
Operating voltage24VDC
Operating environment Humidity

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 SignalDS18B20 digital temperature sensor
Measuring range-55

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

+125

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

Output SignalRS-485 communication signal, Modbus RTU
Nodes32 nodes(max)

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
A

Yellow

B

Blue

GND

Brown

VCC

Pink

Address, Baud rate setting use the accessary serial debugging software, pick ModbusRTU,choose check CRC16(ModbusRTU),input
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

Note
VCC--Power Supply +
GND--Power Supply-/mARH--Humidity mA+
TH--Temperature mA+

04 return to 4 bytes
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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