Application and function
The LI-24G/AL temperature transmitters are designed to convert a measurement signal from resistance temperature detectors (RTDs) or thermoelectric sensors (thermocouples) into a 4–20 mA current signal. The transmitters can be configured for one or two measurement channels. When configured for two channels, it is possible to measure the difference, average, average with redundancy, minimum, or maximum temperature. The transmitters feature compensation of ambient temperature influence on measurement error as well as coldjunction compensation for thermocouples using an internal sensor, an external sensor (Pt100), or a fixed reference temperature.The transmitters provide continuous monitoring of memory integrity, correctness of sensor connections, and proper operation of internal components.
Technical information: See datasheet
Input signal:
Resistance: Pt100,Ni100
Voltage: K, J,S,B,N,T, R, E
Limit process:
-10mV< E<100mV or -100mV< E<1000mV
0Ω
Output signal: 4 - 20 mA + Hart
Power supply:
10…36 VDC
Ex: 10…30 VDC
Base error: ±0,1%
Alarm signal:
3,75 mA / 21,6 mA (NORMAL)
3,6 mA / 21 mA (NAMUR NE89)
Time constant: 0,2…1s
Additional electronic damping: 0...30s
Ambient temperature:
-40…+85°C
Ex: -40…+70°C
Ordering procedure: See datasheet