Acrel Whd72-22 Temperature & Humidity Controller

• Customization: Available
• Installation Type: Strap-on
• Sensing Type: Wireless
• Model NO.: WHD72-22
• Contact: Contact
• Output Signal Type: Digital Type
• Production Process: -
• IP Rating: IP68
• Customized: Customized
• Temperature: -40.0ºC-99.9ºC
• Transmitting Output: DC 4-20mA or DC 0-20mA
• Humidity: 0%Rh-99%Rh
• Output Contact Capacity: 5A/AC250V
• Communication Port: RS485,Modbus(RTU)
• Transport Package: Carton
• Trademark: Acrel
• Origin: China
• HS Code: 9025191010
• Package Size: 17.00cm * 15.00cm * 13.00cm
• Package Gross Weight: 1.000kg
• Lead Time: 1 days (1 - 100 Pieces) ; To be negotiated ( > 100 Pieces)

Product Description

1 General
The controller for temperature and humidity is suitable for adjustment and control of temperature and humidity in equipments of high voltage switchgear, terminal box, ring network panel, box transformer substation etc. It can effectively protect relevant equipment from faults resulting from excessive low or high temperature, creepage or flashover etc.from humidity or condensation.

2 Operational principle
The controller for temperature and humidity mainly consists of three parts of transmitter, controller, heater(or fan etc.), its operational principle is shown as following:

The message of temperature and humidity in the box is detected by the sensor and analyzed by the controller: When environmental temperature, humidity is up to the presetting value or exceed the presetting value, the controller is giving related signal to contects of relay, then the heater(or fan) is energized and working to heat of dehumidifying; after environmental temperature,humidity is well below the presetting value,the heater(or fan) is deednergized and stop working. In addition to its basic functions, the specific product with different type possess secondary functions such as alarming output for wire-breaking,communication,forced heating etc.

Note:
(1)Number 0f temperature, humidity(or temperature) sensor to be connected with WHD48,WHD72,WHD20R,WHD46 is up to 1,2, 3 respectively;
(2)Every sensor match with two control output contacts(passive), connected with heater and fan respectively,the heater is used for rising temperature or removing moisture,the fan is used for decreasing temperature;
(3)uxiliary function of WHD46:RS485 communication,alarming output function and transmitting function. Only one can be selected.
Auxiliary function of WHD48:RS485 communication.
Auxiliary function of WHD72:Alarming output function,RS485 communication and transmitting function.The latter two can only be selected.
Auxiliary function of WHD20R:RS485 communication and alarming output function.Both can be selected at the same time.
"- C"for communication,"-J"for alarming,"-M"for transmitting.
(4)The connecting wire between sensor and controller must use four-core shielded cable. And its maximum length must not exceed 20 m.

 

Technical parameter				Value
Measuring range			Temperature	-40.0ºC~99.9ºC
			Humidity	0%RH~99%RH
Precision			Temperature	±1ºC
			Humidity	±5%RH
Transmitting output				DC 4~20mA or DC 0~20mA
Set range of controlling parameter	Heating for Temperature rising			-40.0ºC~40.0ºC
	Blowing for temperature decreasing			0.0ºC~99.9ºC
	Humidity control			20%RH~90%RH
output contact capacity				5A/AC250V
Start/stop gap				5
Communication port				RS485,MODBUS(RTU)
Auxiliary power		Voltage		AC 85~265V DC 100~350V
		Consumption		Basic power consumption(≤0.8w); relay power consumption(each channel≤0.7w)
Insulation resistance				≥100MΩ
power-frequency withstand voltage				power with shell,touchable metal parts/ power with other terminal group 2kV/1min(AC,RMS)
average work time without stoppage				≥50000h
Working condition (controller)			Temperature	-20ºC~+60ºC
			Humidity	≤95%RH,without condensation and corrosive gas
			Altitude	≤2500 m

 

Type	Function	Sensor(Pcs)	Mounting mode
WHD48-11	One channel temperature, humidity control	WH-3(1)	Embedded catout:45x45

Type	Function	Sensor(Pcs)	Mounting mode
WHD46-11	One channel temperature, humidity control	WH-3(1)	Embedded catout:116x56
WHD46-22	Two channel temperature, humidity control	WH-3(2)
WHD46-33	Three channel temperature, humidity control	WH-3(3)