Product Overview
Technical Summary
| Product type | SIMATIC S7-300 analog input SM 331 |
|---|---|
| Analog inputs | 8 |
| Resolution | 9/12/14 bit; up to 15 bit with overrange including sign |
| Supported signals | Voltage, current, thermocouple, resistance thermometer and resistance |
| Rated load voltage L+ | 24 V DC |
| Front connector | 20-pin |
| Diagnostics | Parameterizable diagnostics, diagnostic alarm and limit value alarm |
| Isolation | Between analog inputs and backplane bus; between analog inputs and electronics power supply |
| Lifecycle | Product cancellation |
| Configuration note | Spare part; 1x 20-pole removable connector with active backplane bus |
Key Features
SM 331 provides 8 analog inputs; the inputs are isolated from the backplane bus and electronics power supply, but not from each other.
Supports voltage, current, thermocouple, resistance thermometer and resistance measurement, including 2-wire, 3-wire and 4-wire resistance connections.
Resolution with overrange is up to 15 bit including sign; parameterizable integration times are 2,5 / 16,67 / 20 / 100 ms.
Has parameterizable diagnostics, diagnostic and limit value alarms, readable diagnostic information, and a red Group error SF LED.
Rated load voltage L+ is 24 V DC. The required front connector is 20-pin; the collected description specifies 1x 20-pole removable connector with active backplane bus.
Module dimensions are 40 mm width, 125 mm height and 117 mm depth; weight is approximately 250 g.
Frequently Asked Questions
What is the exact Siemens line item?
It is Siemens 6ES7331-7KF02-0AB0, a SIMATIC S7-300 analog input SM 331 module.
How many analog inputs does the module have?
It has 8 analog inputs, with voltage, current, thermocouple, resistance thermometer and resistance measurement supported.
What connector is required?
The required front connector is 20-pin. The collected description specifies 1x 20-pole removable connector with active backplane bus.
What supply voltage is specified?
The rated load voltage L+ is 24 V DC, with reverse polarity protection.
How should this line item be included in a project request?
Provide the requested quantity, destination, schedule context and any additional BOM lines for quotation review.
