About SIEMENS PLC SM331 6ES7331-7PF01-0AB0

Enhance your industrial automation systems with the SIEMENS PLC SM331 6ES7331-7PF01-0AB0, a high-performance digital input module designed for Siemens S7-300 PLCs. The SM331 6ES7331-7PF01-0AB0 provides reliable and efficient signal processing, making it ideal for a wide range of industrial applications such as machine control, process automation, and manufacturing.

The SIEMENS PLC SM331 6ES7331-7PF01-0AB0 features 16 digital input channels, ensuring fast and accurate data transfer between your field devices and PLCs. Its robust design and high-quality performance allow it to function effectively in demanding industrial environments, ensuring that your automation systems run smoothly and efficiently.

At Naksh Technology Solution LLP, we offer expert integration and support for the SIEMENS PLC SM331 6ES7331-7PF01-0AB0, ensuring seamless implementation and optimized system performance.

Upgrade your automation systems with the reliable and efficient SM331 6ES7331-7PF01-0AB0, designed to provide dependable input processing for your Siemens PLC setup. 

Data Sheet 6ES7331-7PF01-0AB0

SIMATIC S7-300 | Analog Input Module SM 331 (Isolated)
8 AI | 2/3/4-Wire | RTD & Resistance Measurement

Supply Voltage

• Load voltage L+ (DC): 24 V

• Reverse polarity protection: Yes

Input Current

• From L+ (without load), max.: 240 mA

• From backplane bus (5 V DC), max.: 100 mA

Power Loss

• Typical: 4.6 W

Analog Inputs

• Number of inputs: 8

• For resistance measurement: Yes (8 channels)

• Destruction limit voltage: 75 V (1 s), 35 V continuous

Supported Input Types

Voltage Inputs

• Not supported

Current Inputs

• Not supported

Thermocouples

• Not supported

Resistance Thermometers (RTD)

Supported types:

• Cu10

• Ni100 / Ni120 / Ni200 / Ni500 / Ni1000

• LG-Ni1000

• Pt100 / Pt200 / Pt500 / Pt1000

Resistance Measurement

Ranges supported:

• 0150

• 0300

• 0600

Characteristic Linearization

• Parameterizable for all supported RTD & resistance types

Cable Length

• Shielded cable: up to 200 m

Analog Value Processing

• Resolution: 16-bit (twos complement)

• Integration time: Parameterizable

• Conversion time:

  • Up to 4 channels: 10 ms/module

  • 5 channels: 190 ms/module

  • 8 channels: 80 ms/module

• Interference suppression: 400 / 60 / 50 Hz

Encoder Connections

Supported wiring:

• 2-wire: Yes (no lead resistance correction)

• 3-wire: Yes

• 4-wire: Yes

Accuracy

Operational error (full temp range)

• Resistance: 0.1%

• RTD: 1 K

Basic error at 25C

• Resistance: 0.05%

• RTD: 0.5 K

Diagnostics / Alarms

• Diagnostics function: Yes

• Diagnostic alarm: Yes (per group)

• Limit alarm: Yes

• Hardware interrupt: Yes (channels 07)

• Diagnostic info readable: Yes

LED Indicators

• SF (group error): Red

Isolation

• Channel-to-channel: Yes

• Channel groups: Yes (groups of 2)

• Channel to backplane bus: Yes

• Channel to electronics supply: Yes

• Isolation tested: 500 V DC

Connection Method

• Required front connector: 40-pin

Mechanical Data

• Width: 40 mm

• Height: 125 mm

• Depth: 120 mm

• Weight: approx. 272 g

Technical Details