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Specification of Multi-Function Differential Pressure Transmitter LFM73

Measured Medium	Air or non-corrosive gases
Measurement range	+100Pa,+1000Pa,+10000Pa
Overload pressure	5KPa(+100Pa); 10KPa(+1000Pa); 80KPa(+10000Pa)
Accuracy	+1.0%FS
Operation Temperature	-20°C~80°C
Compensated Temperature	-10°C~60°C
Storage Temperature	-40°C~85°C
Response time	0.5s (default) / 1.0s / 2s / 4s
Protection Grade	IP65
Pressure Connection	Concave Interface Φ 6.5 mm
Output Signal	4~20mA(three wire) / 0~10V / RS485
Control Signal	2*SPST, 3A-30VDC / 250VAC
PowerSupply	16-30VDC / 24VAC+20%
Wiring method	Cable leads from the back
Consumption	≤1.5W
Housing Material	Cast aluminum housing, PC panel
Communication	RS-485 standard interface, Modbus RTU protocol
Key	Three tap keys
Display	4 bit 0.8" nixie tube
Weight	390g

Size Chart:

英文-LFM73规格书20.0_2_01(1).png

Product model	Cable color	Red	Black	White	Green	Brown	Yellow	Gray	Blue
LFM73X-ANXX LFM73X-ABXX	Electrical signal	+24V	GND	Vout	Iout
LFM73X-ENXX LFM73X-EBXX	Electrical signal	+24V	GND	A+	B-
LFM73X-NRXX LFM73X-NDXX	Electrical signal	+24V	GND			Normally open contact NO1	Public end COM1	Normally open contactNO2	Public end COM2
LFM73X-ARXX LFM73X-ADXX	Electrical signal	+24V	GND	Vout	Iout	Normally open contact NO1	Public end COM1	Normally open contactNO2	Public end COM2
LFM73X-ERXX LFM73X-EDXX	Electrical signal	+24V	GND	A+	B-	Normally open contact NO1	Public end COM	Normally open contactNO2	Public end COM2
LFM73X-HNXX	Electrical signal	+24V	GND	A+	B-	Iout

REMlINDER: For other product models, please refer to the information on the surface of the product for specific wiring methods.

Installation Precautions:

Installation and wiring should be performed by qualified technicians. The power should be turned off during wiring. When the transmitter is powered by a 24VAC power supply, it is recommended to use a transformer-isolated AC power supply. When the transmitter shares a 24VAC power supply with other equipment, it is necessary to ensure a reliable connection between 24V and GND. Otherwise, there may be unpredictable situation, or even damage to the equipment.