Overview
The 6ES7288-3AR04-0AA0 is a Siemens SIMATIC S7-200 SMART SM AR04 RTD analog input module with 4 RTD inputs and 16-bit resolution. Supply is 24 V DC with -15/+20% tolerance; the module draws 80 mA from the backplane. Dimensions are 45 mm width, 100 mm height, 81 mm depth, weight 150 g.
How it compares
Both the 6ES7288-3AR04-0AA0 and the S7-1200 RTD module 6ES7231-5PD32-0XB0 offer 4 RTD inputs, but the S7-200 SMART module provides 16-bit resolution versus the 15-bit resolution of the S7-1200 peer — a difference in measurement granularity for temperature loops.