Huawei 02312PBL Manuel utilisateur

Issue: 01

Date: 2019-08-23

Temperature and Humidity Sensor

Quick Guide (02312PBL)

1Product Overview

Adopts a dedicated

low-power

temperature and

humidity collection

chip featuring wide

measurement range

and high precision.

Supports extended

NTC temperature

sensors.

Provides an RS485

signal port and 6-

digit device address

DIP switch.

Supports the

Modbus-RTU

communications

protocol and baud

rate configuration.

Displays the

temperature,

humidity, address,

and baud rate using

nixie tubes.

Supports online

software upgrade.

Supports wall-

mounted installation

or magnetic

attachment.

Item

Temperature

Humidity

Measurementrange

–

40°Cto +70°C

–95% RH

Precision

1°C(0°C to +60°C)

5% RH (25°C, 20%–80%

RH)

Precisiondrift

≤ 0.05

°C/year

≤ 0.5% RH/year

Extendedtemperature

collectionport

Providestwo RJ45ports to connectsix NTC

temperature sensors,eachRJ45 port connectingto

three NTC temperaturesensors.

Signal port

RS485

Powersupply

–16V DC (typical value 12 V DC)

Power consumption

280mW

Storage environment

–

40°Cto +70°C

Key Performance Specifications

1.1

RS485-OUT RS485-IN

DIP switch

Button

Display

Dimensions (Unit: mm)

1.2

Dimensions with

base

NTC1-3

NTC4-6

2Installation Method

Wall-mounted installation: Screw the product base

to a wall, and secure the product to the base.

Hole dimensions

Magnetic Attachment

Magnetic attachment: Remove the product base, and attach the product firmly to the surface of a

metal object.

Wall-Mounted Installation

T/H sensors have nixie tubes for displaying the temperature (°C by default), humidity, address,

and baud rate.

The temperature and humidity are displayed alternately.

The address and baud rate can be displayed alternately by pressing the button.

The default temperature value is Celsius temperature. Toggle switch 8 can be used to switch

the temperature unit. ON is for Fahrenheit and OFF is for Celsius.

Celsius

temperature Humidity Address Baud rate

3Display Description

Wall-mounted installation

Fahrenheit

temperature

4Communication Settings

The Modbus-RTU communication protocol is adopted.

Default settings: baud rate 9600 bps; 8 data bits; one stop bit; no parity check.

The RUN indicator blinks fast at 10 Hz during communication.

Port Description

1.3

Female connector

Standard RJ45 ports marked RS485-IN and RS485-OUT are used to cascade

multiple T/H sensors. The pin definitions are the same.

The NTC1-3 and NTC4-6 ports are standard RJ45 ports used for connecting

extended temperature sensors.

NTC1

-3 Definition

NTC1

GND

Reserved

NTC2

GND

NTC3

GND

NTC4

-6 Definition

NTC4

GND

Reserved

NTC5

GND

NTC6

GND

Definition

RS485+

RS485

–

12 V DC

RS485+

RS485

–

GND

Device Address Setting

4.2

Toggle switches 1–6 are used to set device

addresses, toggle switch 7 is reserved, and toggle

switch 8 is used to switch the temperature unit.

1. Hold down the button when the baud rate is displayed until the baud rate starts blinking.

2. Press the button to switch the baud rate between 9.6, 19.2, 38.4, and 115.2 which respectively

indicate 9600 bps, 19200 bps, 38400 bps, and 115200 bps.

3. Select a baud rate, press and hold the button until all indicators light up.

Baud Rate Setting

4.1

DIP switch

Device addresses are set in binary coding format in

the range of 1–63. The first bit is the least significant

bit, and the sixth bit is the most significant bit. ON

indicates 1 and OFF indicates 0.

Temperature and Humidity Querying Examples

4.3

Temperature and humidity response example:

Device Address Function Code RegisterAddress Quantity of Register CRC16

01 03 00 02 00 02 65 CB

Temperature and humidity query command example:

Device Address Function Code Byte Length Temp. Humidity CRC16

01 03 04 00 F6 01 1F 5A 59

The preceding data is in hexadecimal format. The temperature F6 is 246 after being converted to

decimal format, indicating that the temperature is 24.6°C. The humidity 11F is 287 after being

converted to decimal format, indicating that the humidity is 28.7% RH.

The NTC port is not connected. The NTC value response data is 80 00.

NTC temperature query command example:

Device

Address Function

Code Byte

Length NTC1

Value NTC2

Value

…… NTC5

Value NTC6

Value CRC16

01 03 0C 01 0B 01 0A …… 80 00 80 00 E3 F3

NTC temperature response command example:

Device Address Function Code RegisterAddress Quantity of Register CRC16

01 03 00 21 00 06 95 C2

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