Key Features
- Analog input module for SIMATIC S7-300: SM 331 analog input module with 8 AI.
- Isolated inputs with separation: Potential separation is provided between the channels, between the channels and backplane bus, and between the channels and the power supply of the electronics.
- Voltage and current input ranges: Supports +/-5/10V, 1-5 V, +/-20 mA, and 0/4 to 20 mA.
- 16 bit resolution: Resolution with overrange is 16 bit; unipolar and bipolar values are listed per channel.
- Diagnostics and alarms: Diagnostics function, diagnostic alarm, limit value alarm, and hardware interrupt are parameterizable.
- 1x 40-pole front connector: Required front connector: 40-pin.
Applications
- Analog signal acquisition for voltage and current inputs: Acquires voltage and current signals using the supported input ranges.
Technical Summary
| Product function | SIMATIC S7-300, analog input SM 331 |
|---|---|
| Number of analog inputs | 8 |
| Input ranges, voltage | +/ -5/10V, 1-5 V, +/-20 mA, 0/4 to 20 mA |
| Resolution with overrange | 16 bit; Unipolar: 15/15/15/15 bit; bipolar: 15 bit + sign/15 bit + sign/15 bit + sign/15 bit + sign |
| Basic conversion time (ms) | 10 ms (4-channel mode); 95/83/72/23 ms (8-channel mode) |
| Integration time, parameterizable | Yes; 23 / 72 / 83 / 95 ms |
| Load voltage L+ | Rated value (DC) 24 V |
| Power loss, typ. | 3 W |
| Required front connector | 40-pin |
| Isolation tested with | 500 V AC |
Frequently Asked Questions
What is Siemens 6ES7331-7NF10-0AB0?
It is a SIMATIC S7-300 analog input SM 331 with 8 AI.
Which input ranges does this SM 331 module support?
It supports +/-5/10V, 1-5 V, +/-20 mA, and 0/4 to 20 mA.
What resolution does the 6ES7331-7NF10-0AB0 provide?
The module provides 16 bit resolution with overrange.
What connection and supply details should be checked for selection?
It requires a 40-pin front connector and uses load voltage L+ rated value (DC) 24 V.
