WS2050 two-wire isolated thermal resistance signal conditioner 
2-wire 4-20mA output; can be directly interfaced with Pt thermal resistance sensor; includes linearization and long-line compensation; DIN T-rail mounting 
Input / output range:
Tail input 
A -20~100°C 
B 0-100 ° C 
C 0-150 ° C 
D 0-200°C 
E 0-400 ° C 
S user specific specifications 
 The main technical parameters:
Thermal resistance excitation voltage 1.2V  
RTD disconnection indicates about 25mA  
Output load resistance R 0-500Ω  
Thermal resistance input line resistance 100Ω (Max)  
Accuracy <0.2%  
Temperature coefficient <100ppm/°C  
Operating temperature range -20~55°C  
Isolated input and output isolation  
Response time <500mS  
Insulation resistance >100MΩ (500VDC)  
Insulation strength 1500VDC / 1 minute  
Power supply Vs 24VDC  
 Ordering Guide:
WS2050-Pt100 
Example: WS2050C, ie Pt100, 
Input 0-150 ° C output is 4-20 mA