Huawei 02312PBL Bedienungsanleitung
Issue: 01
Date: 2019-08-23
Temperature and Humidity Sensor
Quick Guide (02312PBL)
Copyright © Huawei Technologies Co., Ltd. 2019 All rights reserved.
1
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
5%
–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
9
–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
2
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.
Pin
1
2
3
4
5
6
7
8
NTC1
-3 Definition
NTC1
GND
Reserved
NTC2
GND
NTC3
GND
GND
NTC4
-6 Definition
NTC4
GND
Reserved
NTC5
GND
NTC6
GND
GND
Pin
1
2
3
4
5
6
7
8
Definition
RS485+
RS485
–
12 V DC
RS485+
RS485
–
–
–
GND
3
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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