Siemens SIMATIC S7-200 SMART RTD Input Module

Siemens SIMATIC S7-200 SMART RTD Input Module About

The Siemens 6ES7288-3AR02-0AA0 is an active, compact SIMATIC S7-200 SMART thermal resistance expansion module (EM AR02) designed for high-precision temperature tracking in process control layouts. This 45mm-wide component adds two analog inputs optimized explicitly for Resistance Temperature Detectors (RTD). It features an exceptional 15-bit plus sign resolution to capture minute temperature variations cleanly.Engineered to interface with standard industrial temperature sensors, it supports 2-wire, 3-wire, and 4-wire connection topologies. It natively processes common sensor profiles, including Pt100, Pt200, Pt500, Pt1000, Ni100, and Ni120, alongside pure resistance inputs (150, 300, 600). Housed in a dense, IP20-protected enclosure for standard DIN rail mounting, it runs efficiently with a low 1.5W typical power loss. Front-facing LEDs provide instantaneous alerts for wire breaks, short circuits, and out-of-range limit violations.