wall-mounted air quality transmitter / RS-485
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7-in-1 Modular Transmitter (Model 485) User Manual V1.1 7-in-1 Environmental Monitoring Transmitter User Manual （Model:AQM-RK485）

7-in-1 Modular Transmitter (Model 485) User Manual V1.1 1. Product description 1.1 description The product is a wall-mounted high-grade enclosure with a protection grade of IP65, rain and snow proof and good air permeability. The circuit uses imported industrial-grade microprocessor chips, high-precision temperature sensors, and environmental monitoring sensors. Ensure product reliability. This product adopts a particle sintered probe sheath, and the probe is directly connected to the shell and has a beautiful appearance. The output signal type is divided into RS485, which can realize...

7-in-1 Modular Transmitter (Model 485) User Manual V1.1 2．Equipment installation instructions 2.1 Inspection before equipment installation Equipment List: ■ 1 temperature and humidity transmitter equipment ■ Certificate of conformity, warranty card, calibration report, etc. ■ 2 expansion plugs, 2 self-tapping screws ■ USB to 485 (optional) ■ 485 terminal resistance (gift for multiple devices)

7-in-1 Modular Transmitter (Model 485) User Manual V1.1 Special Note： 1） There are certain specification requirements for 485 line field wiring. For details, please refer to the data package "485 Equipment Field Wiring Manual". 2） When the device is connected to the 485 bus, ensure that the addresses of multiple devices will not be repeated. 2.3 Wiring instructions Power and 485 signal Wide voltage power input is 10~30V. When wiring the 485 signal wire, pay attention to the two wires A\B not reversed, and the addresses of multiple devices on the bus cannot conflict. Thread color Power...

7-in-1 Modular Transmitter (Model 485) User Manual V1.1 3. Configuration software installation and use 3.1 Software selection Pass the dedicated software test

3.2 Parameter settings ①、Select the correct COM port (check the COM port in "My Computer—Properties —Device Manager—Port")，The following figure lists the driver names of several different 485 converters. ②、Connect only one device separately and power it on, click the test baud rate of the software, the software will test the baud rate and address of the current device, the default baud rate is 9600bit/s, and the default address is 0x01. Support 4800, 9600, 19200, 38400, 115200 The address range is 01~255, address 0 is the broadcast address ③、Modify the address and baud rate according to the...

Time to end structure ≥ 4 bytes Address code: the address of the transmitter, which is unique in the communication network (factory default 0x01). Function code: the command function instruction issued by the host, this transmitter only uses function code 0x03 (read register data). Data area: The data area is the specific communication data, pay attention to the high byte of 16bits data first! CRC code: two-byte check code. Host query frame structure： Address code Function code Register start address Register length Check code high bit Slave machine response frame structure: Addres s code...

4.4 Communication protocol example and explanation Example: Read the temperature and humidity value of the device address 0x01 Inquiry frame (hexadecimal): Function code Initial address Data length Check code high bit Response frame (hexadecimal)：(For example, the temperature is -10.1℃ and the humidity is 65.8%RH) Address code Function code Returns the number of valid bytes 0x04 Temperature Check code low bit value 0xFF 0x9B Check code high bit 0x3D Temperature calculation: When the temperature is lower than 0 ℃, the temperature data is uploaded in the form of complement code. Temperature:...

Appendix: Shell size Wall-mounted shell：110×85×44mm