Isolated eight-channel resistance and RTD input module for SIMATIC S7-300.
Siemens 6ES7331-7PF01-0AB0 is an isolated SIMATIC S7-300 SM 331 analog input module for eight resistance and resistance-temperature-detector channels. It accepts 2-, 3- or 4-wire connections and supports Pt, Ni and Cu sensor characteristics documented by Siemens.
The module provides 16-bit output resolution with internal 24-bit conversion, a 50 ms conversion time and one 40-pin front-connector interface. Selection must follow the complete order number because related SM 331 modules support different sensor groups, measuring ranges and lifecycle conditions.
| Item | Verified information |
|---|---|
| Manufacturer | Siemens |
| Order number | 6ES7331-7PF01-0AB0 |
| Product line | SIMATIC S7-300 / SM 331 |
| Lifecycle | PM400: Announcement of product phase-out |
| Supply review | Availability, condition, delivery timing and compatibility are checked against the requested quantity. |
| Parameter | Specification |
|---|---|
| Module type | SIMATIC S7-300 SM 331 isolated analog input |
| Channels | 8 analog inputs for resistance / RTD measurement |
| Connection methods | 2-wire, 3-wire or 4-wire |
| Supported sensors | Pt100/200/1000; Ni100/120/200/500/1000; Cu10; GOST characteristics |
| Resolution | 16-bit output; internal 24-bit conversion |
| Conversion time | 50 ms |
| Required front connector | 40-pin |
| Isolation | Isolated analog input module |
| Device dimensions (W × H × D) | 40 × 125 × 120 mm |
| Device weight, approx. | 272 g |
Use three current views to verify identity, connectors and physical condition before procurement approval.
Connect supported Pt, Ni and Cu resistance sensors for industrial temperature measurement.
Integrate eight isolated resistance channels into existing SIMATIC S7-300 I/O configurations.
Siemens SiePortal lists 6ES7331-7PF01-0AB0 as PM400: Announcement of product phase-out, with product phase-out effective since 1 October 2023. Existing installations should plan verified spares or an engineered migration; a related analog input module is not automatically a drop-in replacement.
Siemens lists Pt100/200/1000, Ni100/120/200/500/1000 and Cu10 resistance characteristics, including GOST curves.
The module provides eight resistance or RTD analog input channels.
The sensor connection can use 2-wire, 3-wire or 4-wire configurations.
A 40-pin front connector is required.
Siemens lists PM400: Announcement of product phase-out, effective since 1 October 2023.
Verify the full order code, sensor curve, wiring method, connector, rack configuration, scaling and lifecycle plan.
Send the quantity, delivery destination and clear nameplate photographs for supply, compatibility and warranty review.
Copy or open: sales6@apterpower.com | +86 181 5988 9985
A documentation-led service path for exact order-code identification, condition review, compatibility checks, testing, packing and international delivery.
01
Requirement ReviewQuantity, destination, condition preference and schedule. |
02
Identity MatchOrder code, series, label and hardware revision review. |
03
Physical InspectionHousing, connectors, terminals, indicators and mounting hardware. |
04
Functional ReviewPower-up, indicator states and applicable channel or interface checks. |
05
Evidence PackageCurrent photographs and test observations before dispatch. |
06
Protected DeliveryESD protection, cushioning, tracking and export documents. |
When available for the selected unit, the review package focuses on these three views.
Identity and traceability
Channel interfaces and terminals
Housing and mounting condition
| Area | Service approach |
|---|---|
| Packing | ESD-safe inner protection with connector shielding and shock-resistant outer packing. |
| Global delivery | Tracked shipment options are reviewed for the destination, urgency and import requirements. |
| Warranty | Warranty scope is stated on the quotation according to condition and service level. |
| Compatibility | The buyer remains responsible for final system approval; we support the order-code and interface review. |
Share the installed-unit label, required quantity and delivery location for a focused service response.
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Copy or open: sales6@apterpower.com | +86 181 5988 9985
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Model availability and compatibility are reviewed independently for every enquiry. Send the complete order code and installed-system details.
Send the complete model, quantity, condition preference and delivery destination for a focused supply review.
Copy or open: sales6@apterpower.com | +86 181 5988 9985
