SIEMENS S7300 PLC 6ES7331 7KB02 0AB0

The Siemens S7300 PLC 6ES7331-7KB02-0AB0 is a compact, high-performance programmable logic controller (PLC) designed for advanced automation applications. It features a 20-pin connection type for secure and efficient linkages, and its dimensions (40 x 125 x 120 mm) make it suitable for tight installations. Built for reliability, the PLC operates on a rated voltage of 24V DC with a current consumption of 50 mA and minimal power loss of 1W. It ensures robust performance under varying conditions, with a wide operating temperature range of -20C to +60C and a humidity tolerance of 95%. The IP20 protection rating offers resistance against dust and accidental touch, while DIN-rail mounting ensures easy installation. With a lightweight construction of 250 grams and a durable black design, the Siemens S7300 PLC is optimized for seamless integration in industrial environments operating at 50/60 Hz frequency. It supports advanced isolation up to 500V DC, ensuring safety and durability for automation processes.

General Information

• Product Type: SM 331, Analog Input (isolated)

• Number of Channels: 2 AI

• Resolution: 9 / 12 / 14 bits

• Supported Signals: Voltage, Current, Thermocouple, Resistance, Resistance Thermometer

• Features: Alarm, Diagnostics, Removing/inserting with active backplane bus

Supply Voltage

• Rated Value (DC): 24 V

• Reverse Polarity Protection: Yes

• Current Consumption:

  • From L+ (no load): max 30 mA

  • From backplane bus 5 V DC: max 50 mA

• Power Loss: Typ. 1 W

Analog Inputs

• Voltage Input:

  • Max destruction voltage: 20 V continuous, 75 V for 1 s

• Current Input:

  • Max destruction current: 40 mA

• Resistance Measurement Current: Typ. 1.67 mA

Voltage Ranges (Rated Values)

Current Ranges

Thermocouple Types Supported

• E, J, K, N (10 M input resistance)

Resistance Thermometer

• Ni100, Pt100 (10 k standard input resistance)

Resistor Ranges

• 0150 , 0300 , 0600 (10 M input resistance)

Thermocouple / Temperature

• Temperature Compensation: Parameterizable, internal, and external via compensation socket

• Characteristic Linearization: Parameterizable (Types E, J, K, L, N, Pt100, Ni100)

• Max Cable Length: 200 m (shielded), 50 m for 80 mV & thermocouples

Analog Value Generation

• Resolution (with overrange): Unipolar: 9/12/12/14 bit; Bipolar: 9/12/12/14 bit + sign

• Integration Time (parameterizable): 2.5 / 16.67 / 20 / 100 ms

• Basic Conversion Time: 3 / 17 / 22 / 102 ms

• Interference Voltage Suppression: 10 / 50 / 60 / 400 Hz

Errors / Accuracy

• Voltage: 1 % (operational), 0.6 % at 25 C

• Current: 0.7 % (operational), 0.5 % at 25 C

• Resistance: 0.7 % (operational), 0.5 % at 25 C

• Resistance Thermometer: 0.70.8 % (operational), 0.50.6 % at 25 C

• Thermocouple: 1.1 % (operational), 0.7 % at 25 C

Diagnostics & Status

• Diagnostics Function: Yes, parameterizable

• Alarms: Diagnostic, Limit Value Alarm (channel 0)

• Diagnostics Readable: Yes

• LED: Group Error SF (red)

Potential Separation

• Between Channels: No

• Between Channels & Backplane Bus: Yes

• Between Channels & Power Supply: Yes (Not for 2-wire transmitters)

• Isolation Tested: 500 V DC

Connection Method

• Connector: 20-pin front connector

Dimensions & Weight

• Width: 40 mm

• Height: 125 mm

• Depth: 120 mm

• Weight: 250 g

Technical Details 

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