Industrial Communication | Siemens | 6ES7 131-4BD00-0AA0 6ES7131-4BD00-0AA0 SIMATIC DP Modules for ET200S

Product Description: Siemens 6ES7131-4BD00-0AA0

The Siemens 6ES7131-4BD00-0AA0 is a compact digital input expansion module from the SIMATIC S7-1200 series, model SM 131. It provides eight digital input channels for 24 V DC signals, enabling connection of sensors, switches, and other discrete field devices. Designed for high reliability and fast response, the SM 131 integrates seamlessly with S7-1200 CPUs via the backplane bus, offering a cost-effective solution for expanding the digital input capacity of small to mid-range automation systems.

Key Features

• Digital Inputs: 8 channels, 24 V DC
• Input Type: Sinking (NPN) or Sourcing (PNP)
• Voltage Range: 24 V DC ±20%
• Input Current per Channel: 6 mA typical
• Input Delay: ≤1 ms
• Mounting: Snap-in on S7-1200 rail
• Configuration: Auto-recognition in TIA Portal

Technical Specifications

• Series: SIMATIC S7-1200
• Module Type: SM 131 Digital Input Module
• Number of Inputs: 8
• Input Voltage: 24 V DC ±20%
• Input Current: 6 mA per channel typical
• Input Delay: ≤1 ms
• Backplane Bus Connection: Yes
• Dimensions (W × H × D): 40 mm × 100 mm × 75 mm
• Mounting: DIN rail (S7-1200 rack)
• Operating Temperature Range: 0 °C to +55 °C
• Protection Class: IP20
• Certifications: CE, cULus

Application Areas

• Expansion of digital inputs for S7-1200 PLCs
• Connection of push-buttons, limit switches, proximity sensors
• Discrete control and monitoring in machine and process automation
• OEM applications requiring compact, modular I/O

Advantages

• High-density 8-channel input module in a compact footprint
• Fast response times (≤1 ms) for time-critical applications
• Flexible input type (PNP/NPN) for diverse field device compatibility
• Seamless integration and recognition in TIA Portal