1. Brief Introduction
LU-904M intelligent controller is high accuracy digital display survey control meter for the liquid level, temperature and pressure. Matched with the sensors and transmitters, may constitute each kind of measuring ranges and specifications measuring control system for the liquid level, temperature and pressure.
LU-904M intelligent controller has four channels alarm output, each channel alarm output can willfully be set for the upper limit alarm or the lower limit alarm, may has 0-10mA, 4-20mA standard current transform output which can be freely set and the DC24V/50mA sensors power supply. There is light pillar to display PV.
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2. The main Technical Parameters
◆Input accuracy: ± (0.2%F.S+1) digit
◆Resolution: 1, 0.1
◆Display: Double Four LED Numerical Code Tube + light pillar
◆input specification:  K、S、B、T、E、J、WRe325、N
Pt100、Cu50、Cu100
0-10 mA、 4-20mA
0-5V 、1-5V
specially input: R 、Wre526 、mV、other
◆output model types：
J1: relay output (resistance 250VAC/3A normally open and hold)
J2: relay output (resistance 250VAC/0.8A normally open)
J3: two relays outputs (resistance 250VAC/0.8A normally open×2)
T: SSR trigger output (12V/40mA)
I2: current transform output (0-10mA/4-20mA)
V5: voltage transform output (0-5V or 1-5V or 0-10V)
V1：DC12V/50 mA sensors power supply model
V2：DC24V/50 mA sensors power supply model
V3：DC5V/50 mA sensors power supply model
R：RS232 communication model
S：RS485 communication model
◆the T.C cold-junction compensation errors: ±1 ℃
◆the T.C breaks or measuring range ultra: Display Sb
◆sampling rate: 0.5 seconds
◆power voltage: 85-264VAC
◆ power consumption: 4W
 

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