ICWalk: H649WD Temperature transmitter board

Temperature transmitter board H649WD 2025v1

Description :

H649WD series of isolated temperature transmitter boards converts the ThermoCouple (TC) or Resistance Temperature Detector (RTD) signals from the field, after digital linearization processing, into a temperature-linear 4-20mA current isolated output. It supports Pt50, Pt100, Pt500, Pt1000, and types E, J, B, K, N, R, S, T of thermocouples
For RTD connections, two-wire, three-wire, or four-wire configurations are available. When connecting thermocouples, the built-in cold junction compensation function can be activated. It also supports the measurement of millivolt and resistance signals with an isolation voltage of DC1000V.

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Parameters

Technical Specifications

Power Supply: DC10-32V, input from the “power terminal”;

Output: 4-20mA DC with HART communication;

Load Resistance: ≤(U-10)/0.22 ohms;

Output Accuracy: 0.2%, with an additional cold junction compensation error of 1°C for thermocouples;

Continuous Operating Temperature: -40 to +85°C;

Relative Humidity: 10% to 90% RH;

Dimensions: Diameter Φ = 44mm, mounting hole spacing D = 33mm;

Weight: approximately 35g.

Wiring Diagram

Parameters

Type		Measurement scope	Minimum measurement scope	Conversion accuracy
Thermo Couple(TC)	T	-200～400℃	25℃	±0.4℃/0.2％
	E	-200～1000℃	25℃	±0.4℃/0.2％
	J	– 210～1200℃	25℃	±0.4℃/0.2％
	K	-200～1372℃	25℃	±0.4℃/0.2％
	N	-200～1300℃	25℃	±0.4℃/0.2％
	R	0～1768℃	100℃	±0.8℃/0.2％
	S	0～1768℃	100℃	±0.8℃/0.2％
	B	150～1820℃	100℃	±1.0℃/0.2％
		-120～120mV	10mV	±10μV /0.2％
		-1000～1000mV	50mV	±100μV /0.2％
Resistance Temperature Detector（RTD）	Pt50	-200～850℃	10℃	±0.15℃/0.2％
	Pt100	-200～850℃	10℃	±0.15℃/0.2％
	Pt500	-200～850℃	10℃	±0.1℃/0.2％
	Pt1000	-200～850℃	10℃	±0.1℃/0.2％
		0～500 Ω	100Ω	±0.2 Ω/0.2％
		0～4500 Ω	100Ω	±1.0 Ω/0.2％

Ordering Information

Product Type		Part No.	Description
Temperature Transmitter Board	DVRT	D148D	Economical Temperature Transmitter Board; PT100 three -wire; DVRT communication protocol; Junction box installation.
	DVRT	D248WD	Isolated Temperature Transmitter Board; RTD + TC various sensor type inputs; DVRT communication protocol, junction box installation.
	HART	H648WD	Isolated Temperature Transmitter Board; RTD + TC various sensors input; HART communication protocol; junction box installation.
		H649WD	Isolated Temperature Transmitter Board; RTD + TC various sensors input; HART communication protocol; DN rail installation.
		H3051WD	Isolated Temperature Transmitter Board; RTD + TC various sensors input; HART communication protocol; 3051 shell with a display screen.

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