Siemens S7-200，SM231,2AI，15bit，6ES7231-7PB22-0XA0 模块

SIMATIC S7-200, RTD INPUT MOD. 

EM 231, FOR  S7-22X CPU ONLY,  

2AI, PT100/200/500/1000/10000  

NI100/120/1000, CU10,          

RESISTANCE 150/300/600 OHM     

15 BIT+ SIGN