Temperature Transmitters

The LU-S510 smart temperature transmitter (round card) is used for RTD and thermocouple (TC) signal input and provides a two-wire 4~20mA analog transmitter output; it is installed inside the sensor.

Core features:

Supports 8 thermocouple types and 2 RTD types, selectable through software configuration.

Custom temperature range, freely configurable in software.

In the event of a sensor fault (open/short circuit), the output exceeds the current range to indicate an alarm.

 

II. Technical Parameters

 

Input parameters

Input signal: RTD, thermocouple (TC)

Thermocouple cold junction compensation: switchable

Cold junction compensation range: -25~+65°C

Cold junction compensation accuracy: ±1°C

 

Output parameters

Output signal: 4~20mA

Output load: RL⩽(Ue−9)/0.021

Output current for upper/lower limit overflow and open/short circuit alarm: IL=3.85mA, IH=21mA

 

Power supply range: DC9~35V

 

Other parameters

Accuracy: class 0.075 by default; class 0.05 (LU-SU510B) or class 0.03 (LU-SU510C) available on request; class 0.15 by default for Cu50

Temperature drift: 0.02% FS/°C

Response time: 1 s to reach 90% of the final value

Operating temperature: -25~+65°C

EMC: complies with the requirements of GB/T18268 for industrial equipment applications (IEC 61326-1)

 

III. Input Types and Accuracy

Table Sensor model Type Measurement range Accuracy RTD Pt100 -200~850°C 0.075% RTD Cu50 -50~150°C 0.15% Thermocouple (Tc) S -50~1768°C 0.075% Thermocouple (Tc) R -50~1768°C 0.075% Thermocouple (Tc) B 250~1820°C 0.075% Thermocouple (Tc) K -270~1372°C 0.075% Thermocouple (Tc) N -200~1300°C 0.075% Thermocouple (Tc) E -270~1000°C 0.075% Thermocouple (Tc) J -210~1200°C 0.075% Thermocouple (Tc) T -270~400°C 0.075%

Note:

The above performance is tested at an ambient temperature of 20°C±2°C.

For thermocouple measurement, the cold junction error of ≤±1°C must be added.