DS18B20 Input Temperature Acquisition Module 8-way 72-way RS485 MODBUS Communication

The above unit price is the most expensive (without probe) product of 8-way module.More can be done 72 road, less than 72 routes can be done.

Please note that this module can only use DS18B20 digital temperature sensor, not PT100 thermal resistance and thermocouple and other types of temperature sensor.

First, module performance introduction;

This module has six IO buses, each IO bus can suspend up to 12 DS18B20 sensors, so it can measure up to 72 DS18B20 temperature sensors.Modules can be widely used in cabinets, grain depots, base stations, libraries and other multi-channel temperature measurement systems. Its output is 485 bus mode MODBUS-RTU communication protocol.It is convenient for the application of PLC and configuration software.

II: Main Module Parameters

Working voltage: DC8-24V, with power supply polarity protection, maximum 500 mW

Communication interface: RS-485 interface, two-wire system, +15KV ESD protection

Communication rate: 1200-19200 BPS can be set by software

Communication format: 1 bit start bit, 8 bit data bit, 1 bit stop bit, no check bit

Transmission Distance: <1200M (19200bps)

Module address: 00-255 can be set by software

Input signal: 6 channels IO bus, each bus can suspend 12 DS18B20 sensors, up to 72 channels DS18B20 can be measured.

Resolution: Temperature Resolution 0.1 Celsius

Measurement accuracy: - 10 ~+85 C: accuracy 0.5 C

Measuring range: -40-120 C

Data update time: about 5 seconds

Shape size: length * width * height = 122 mm * 70 mm * 43 mm

Installation mode: 35mm DIN rail clamping

Working environment: - 20 C~70 C, 35%~85% RH does not dew

3: Outline structure diagram, pin definition

IV: Instructions for the Use of Modules

1. RS485 Communication Parameters Settings

When the module leaves the factory, the module address is 01 and the baud rate is 9600 bps. Address and baud rate are accessible

Setting up product testing software

2. Wiring schematic

3. Before application, the sensor ID of each channel must be set. The unused sensor ID must be set to 0000000000000000. It must be 8 bytes, 16-digit.The sensor ID is shown in 8 bytes of data below the shell label.

4. Sensor ID search, module can search six sensor IDs at a time, each channel can only connect one sensor. ID starts with 28

5. Data viewing, click Start Measuring to open automatic reading status, and click Stop Measuring to end data viewing.