Temperature and humidity display device

Temperature and humidity display device

Model: DDFB504

I. Overview

DDFB504Temperature and humidity display deviceIt's a machineFor general environmental useA display alarm device with integrated transmission function, temperature display, humidity display, and upper and lower limit alarm; By using Swiss imported temperature and humidity integrated digital sensors, full range calibration, and ultra fast response time, the high reliability and long-term stability of the product are ensured.

This product can be applied in industrial field measurement, offices, supermarkets, archives, production workshops, warehouses, computer rooms, construction sites and other measurement scenarios.

2、 Technical indicators

1.Temperature measurement range: -40~120 ℃

2.Humidity measurement range: 0-100% RH

3.Measurement accuracy: Temperature ± 0.3 ℃ (at 25 ℃);

Humidity ± 2.0% RH (at 25 ℃)

4.Suggested working environment: Temperature: -10 ℃ to 60 ℃;

Humidity: ≤ 80% RH

5.Digital tube display: temperature, humidity

6.Text height: 38mm

7.Visual distance: 20 meters

8.Power consumption: ≤ 10W

9.output signal：RS485， Standard MODBUS protocol

10.Power supply: 5V DC

11.Installation method: Wall mounted
12. Dimensions: 440mm x 150mm x 50mm (length x height x thickness)

13.Response time: 30s

3、 Parameter settings

After connecting the power, the left row digital display on the panel shows the ambient temperature value, and the right row digital display shows the ambient humidity value (as shown in the figure)1As shown).

picture1

Simultaneously press the up and down function keys (buttons)1And buttons2）Don't let go, waitledRelease the button after the display disappears, approximately1Enter the setting state in seconds (as shown in the figure)2As shown,

picture2

The left digital display shows the set item value, and the right digital display shows the set item symbol. Press the button2Set project value display plus1rise; Press the button1, enter the next function setting (as shown in the figure)3As shown).

picture3

Set the project settings in sequence until the end7Item, continue pressing the button1Exit parameter settings (as shown in the figure)4As shown).

picture4

Control wiring instructions

ModbusProtocol Description:

This product can collect temperature and humidity signals throughRS485Interface transmission allows you to directly read data on the computer or use the signal for other purposes.

The default value for the local address is01通道

Protocol format:

address command Register Address High Bit Low bit register address High bit data length Low data lengthcrclow positioncrchigh position

Address:1～247；

Command:

03Simultaneously reading temperature, humidity, and dew point values;

06: Set the lower computer register value

01: Display register values

04Relay control (in upper computer control mode), followed by01、02、04、08It is to turn off the corresponding relay,10、20、40、80It is to turn on the corresponding relay;

Register address definition:

03The address corresponding to the command（16bit）：

address0000 : Humidity

address0001 : Temperature

address0002 Dew point

• Temperature, humidity, and dew point correspond respectively3a16A register with bits, but must be read simultaneously when reading

For example, reading the address as1The temperature and humidity command for the lower computer:

01 03 00 00 00 03 CB 05