The 6ES7231-4HF30-0XB0: Accepts field signals from 0 to 20 mA or bipolar voltage ranges (±10 V, ±5 V, ±2.5 V). The module is parameterizable, with diagnostic alarms configurable per channel for wire-break or underrange, and a typical power draw of 1.5 W from the 24 VDC backplane.
Keep it on the shelf as a critical spare if the line runs — the wide temperature range makes it a drop-in for many builds.
Sits on the S7-1200 rail; width 45 mm leaves room for adjacent modules. Height 100 mm, depth 75 mm — check panel clearance if mounted near gland plates or door-mounted HMIs. CE, FM, and RCM approvals apply. Fall height max 0.3 m in package.