Product information
Overview
Key Features
- 8 analog inputs: The module has 8 analog inputs, all for resistance measurement.
- Resistance measurement: Supported resistance thermometer types include Cu 10, Ni 100/120/200/500/1000 and Pt 100/200/500/1000.
- 2-, 3- and 4-wire connections: Resistance measurement supports two-wire connection without resistance correction, plus three-wire and four-wire connections.
- 24 V supply and protection: Rated load voltage L+ is 24 V DC, with reverse polarity protection. Power loss is typically 4.6 W.
- Diagnostics and isolation: Diagnostics, diagnostic alarms, limit value alarms and parameterizable hardware interrupts are supported. Analog inputs are electrically separated between channels, in groups of 2, and from the backplane bus and electronics power supply.
Technical Summary
| Product type | SIMATIC S7-300 isolated analog input SM 331 |
|---|---|
| Analog inputs | 8 |
| Measurement function | Resistance measurement |
| Supported connections | 2-wire without resistance correction, 3-wire and 4-wire |
| Supported resistance thermometers | Cu 10, Ni 100/120/200/500/1000, Pt 100/200/500/1000 |
| Rated load voltage L+ | 24 V DC |
| Resolution with overrange | 16 bit; Two's complement |
| Required front connector | 40-pin |
| Product lifecycle | Product cancellation |
Frequently Asked Questions
What is the exact Siemens model and module type?
It is Siemens 6ES7331-7PF01-0AB0, a SIMATIC S7-300 isolated analog input SM 331 module.
How many analog inputs does the module have?
It has 8 analog inputs, all for resistance measurement.
Which signal-encoder connections are supported?
It supports two-wire resistance measurement without resistance correction, as well as three-wire and four-wire connections.
Which front connector is required?
A 40-pin front connector is required. For a quotation, provide the required quantity and destination.
