Key Features
- SIMATIC S7-300 analog input module: SM 331 analog input for the SIMATIC S7-300 platform.
- 8 analog inputs for resistance and RTD signals: Number of analog inputs: 8. For resistance measurement: 8.
- 2/3/4-wire connection support: Connection of signal encoders for resistance measurement with two-wire, three-wire, and four-wire connection.
- Isolated input design with diagnostics: Potential separation between the channels, between the channels and backplane bus, and between the channels and the power supply of the electronics.
- Front connector and module size: Required front connector: 40-pin. Dimensions: Width 40 mm, Height 125 mm, Depth 120 mm.
Applications
- Resistance and resistance thermometer signal acquisition: For measuring resistance and resistance thermometer signals through 2/3/4-wire connections.
Technical Summary
| Product function | Isochronous mode: No |
|---|---|
| Load voltage L+ | Rated value (DC) 24 V |
| Number of analog inputs | 8 |
| Resistance measurement inputs | 8 |
| Resistance thermometer inputs | Yes |
| Resolution with overrange | 16 bit; Two's complement |
| Basic conversion time | up to 4 channels: 10 ms per module, over 5 channels: 190 ms per module, 8 channels: 80 ms |
| Diagnostics function | Yes; Parameterizable |
| Potential separation | between the channels |
| Isolation tested with | 500 V DC |
| Required front connector | 40-pin |
Frequently Asked Questions
What is Siemens 6ES7331-7PF01-0AB0 used for?
It is a SIMATIC S7-300 analog input SM 331 for resistance and resistance thermometer signal acquisition.
How many analog inputs does 6ES7331-7PF01-0AB0 have?
It has 8 analog inputs.
Which connection methods are supported for resistance measurement?
It supports two-wire, three-wire, and four-wire connection for resistance measurement.
What installation and connection details should be checked before selection?
Check the required 40-pin front connector and the module dimensions of Width 40 mm, Height 125 mm, and Depth 120 mm.
