What this module is
The Siemens 6ES7144-1JB30-0XB0 is an active-production expansion module for the ET 200X distributed I/O system, providing 2 analog inputs for PT100 RTDs with 12-bit+sign resolution.
Rated IP66/67, this module handles dust and high-pressure washdown environments — a common requirement in food-and-beverage or chemical processing plants where standard IP20 modules won't survive. The 12-bit+sign resolution delivers fine temperature measurement over a PT100 range. The 2/3/4-wire connection accommodates different RTD wiring schemes for lead compensation, with 4-wire giving the best accuracy.