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

Wall-mounted temperature and humidity transmitter with Output RS485(THM100-11M-YC)
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Wall-mounted temperature and humidity transmitter with Output RS485(THM100-11M-YC) - 1

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