SPECIFICATIONS

Functional characteristics of the PT100-RS485 temperature sensor module:

Temperature measurement range: -20℃ to +400℃

Supply voltage: DC 8-25V (12V is recommended)

Working current: 8-13mA

Communication protocol: MODBUS RTU protocol, supporting 03 read instructions and 06 write instructions.

Serial port baud rate: 9600 (default), N, 8,1

Multi-module cascading: By modifying the 485 address, up to 247 modules can be used in cascading (for more than 16, please use an R485 repeater).

Data reading: It can read the temperature and the resistance value of PT100

Compatible sensor: PT100 3-wire or 2-wire sensor

Temperature measurement accuracy: 1%. If the temperature deviation is too large, please recalibrate

Size: 60 x 30 x 16mm

Weight: 16 g

Compatible PT100 sensor specifications:

Product Name: PT100 Waterproof and High-temperature Resistant Probe

Probe diameter: 6.5MM

Probe length: 30MM

Probe material: Stainless steel

Line length: 0.5 m

2/3 line type

Measuring temperature range: -200 to 550 degrees Celsius

Wiring diagram

Wiring instructions: Wiring method for the 3-wire probe: Connect the red wire to P+, and the other two wires of the same color to P- and GND (ports are not distinguished).

Note: Please remove the jumper, otherwise it will affect the accuracy.

2 Wire probe wiring: red wire is connected to P+,blue wire is connected to P-.

Note: The jump cap must be short-circuited; otherwise, measurement cannot be carried out!

RS485 bus connection method:

It needs to be paired with a 485 to TTL module