Excellent Quality Wireless Thermostat with Modbus Function

1). Specification

Temperature setting range: 0~40℃       

Temperature display range: 0~40℃

Fan speed: High, Medium, Low, Automatic

Temperature sensing: NTC thermostat (10K)

Relative humidity: 90%RH        

Environment temperature: -10-50℃

Power voltage: AC AC230V±10% 50/60Hz

Electrical parameters: AC250V 3A

Power: <1.5W

Protect range:IP30

Size:86mm×86mm×15mm

2). Standard configuration

A,Fan coil unit and motorized valve control;

B,18 hours automatic timer;

C,Fan coil unit wind speed conversion--. High, Medium, Low, Automatic;

D,Backlight Color: Blue or green;   

E,Built-in initial setting temperature is 25℃

F,Transfer function between Fahrenheit degree and Celsius degree;

G,Temperature range setting function: The lowest and the highest temperature are limited.

H,Networking function

3). Function

1.Can adjust freely during 0℃~40℃,and display the indoor temperature. The indoor temperature can also displayed even thermostat in power-off condition;

2.18 hours automatic timer power on/off;

3.4 regular Fan speed adjustment mode

4.Can connected to 2 wire or 3 wire motorized valve (2 way or 3 way) or air damper;

5.Cooling and heating  mode;

6.Press “Heat/Cool” key and then “∧” key within 1S, you can set the ceiling temperature while heating, press “Heat/Cool” key and “ ∨ ” key within 1S, you can set the floor temperature while cooling.

7.Optional function: 1) Power-down memory function, If power-on again after accidental power-down, it can save the last working stat

Network control function 

RS485 Interface Parameters:

Communication Way: Half-duplex communication   Baud rate: 9600 bps                    Communication Protection: Prevent lightning protection

Connection Thermostat sets: ≤64 sets (Single bus connection)         

Network Cabling Way: parallel cabling way    Terminal resistance: 120Ω  

Communication distance: ≤500 meter                

MODBUS Interface Protocol:

Adopting CRC16 Efficacy Yards

Packet format: Address- Feature code-Data quantity-No.1…No.n-CRC High efficacy

-CRC Low efficacy  

Data bits, format: 1 Start bit+8 Data bit+1 Odd efficacy+1 stop bit

Address Range: 0~255  Data range: 0~255  Broadcast address: 0 Address

Functional Specification

In normal Internet connection, networking symbols will be displayed in the screen;

With the function of remote locking the thermostat keys, switching machine in local                    place is available;

6). Wiring diagram and schematic

Wiring diagram and schematic 1---Model: WRT-3710N for 4-pipe FCU