6ES7331-7PF01-0AB0 SIEMENS Analog Input Module
Description And Features
The 6ES7331-7PF01-0AB0 is a high-precision Analog Input Module from the SIMATIC S7-300 SM 331 family, developed by Siemens for industrial automation systems.
This module is specifically engineered to measure resistance values and RTD (Resistance Temperature Detector) signals,
offering accurate temperature and resistance acquisition in a variety of automation applications.
Frequently Asked Questions About 6ES7331-7PF01-0AB0
Q: Is this module still in production?
A: No — the product has been on Siemens’ phase‑out list since October 1, 2023.
It’s available only from remaining stock or surplus suppliers and may carry no warranty from Siemens.
Q: What types of sensors does it support?
A: Resistance thermometers including Pt100, Pt200, Pt500, Pt1000, Ni100/120/200/500/1000, and Cu10,
plus bare resistance measurements (0–150 Ω, 0–300 Ω, 0–600 Ω), all using GOST‑mapped characteristic curves.
Q: How accurate and fast is it?
A: The specified accuracy at 25 °C is ±0.05 % for resistance inputs and ±0.5 K for RTDs; overall operating limits within
the full spec range are ±0.1 % / ±1 K. Conversion time is ~50 ms per channel, with optional extended integration time for better resolution.
Q: How do I wire RTDs using 2‑wire vs 3‑/4‑wire?
A: For 2‑wire connections, jumpers must link M+ to IC+ and M– to IC–. In this mode, line resistance is part
of the measurement (no compensation). 3‑ and 4‑wire configurations support compensation and higher precision.
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