Siemens · SIMATIC S7-1200 analog input module
SM 1231 analog input expansion with 8 analog channels for voltage/current signals.
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2 verified buyable offers in this reviewed sample. This is not a market-wide price estimate. Each offer retains its own verification timestamp.
USD 319.97
USD 294.22
Reviewed sample: 2 current buyable listings. Snapshot evaluated 2026-09-26T16:07:11+00:00.
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Count the required analog channels: 4HF32 has 8 inputs; do not substitute the 4-channel 4HD32 module solely because both are SM 1231.
Verify configured ranges per channel: ±10/5/2.5 V or 0/4–20 mA, and 24 V DC supply (20.4–28.8 V permitted); confirm terminal wiring and TIA hardware configuration.
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