PLC | Siemens | 6ES72211BF320XB0 S7-1200 Digital input SM 1221 6ES7221-1BF32-0XB0

Product Description: Siemens 6ES7221-1BF32-0XB0

The Siemens 6ES7221-1BF32-0XB0 is a digital input expansion module for the SIMATIC S7-1200 PLC system. It offers 8 digital inputs that operate at 24 V DC and support both sink and source input configurations. Designed for compact installation and reliable signal detection, it’s ideal for a wide range of industrial automation applications.

Key Features

• Number of Inputs: 8 digital channels
• Input Voltage: 24 V DC
• Input Type: Sink/Source selectable
• Input Current: Approx. 4 mA per channel
• Input Delay Time: Adjustable via TIA Portal
• LED Indicators: Status LEDs for each input channel
• Mounting: DIN rail installation
• Connection Type: Removable terminal blocks

Technical Specifications

• Input Channels: 8
• Rated Input Voltage: 24 V DC
• Input Current: Approx. 4 mA
• Input Type: Sink or Source
• Power Supply Voltage: 20.4 – 28.8 V DC
• Power Consumption: Approx. 1.5 W
• Module Dimensions (W × H × D): 45 mm × 100 mm × 75 mm
• Weight: Approx. 0.15 kg
• Operating Temperature Range: 0 °C to +60 °C
• Protection Class: IP20
• System Compatibility: SIMATIC S7-1200

Application Areas

• Machine and equipment control
• Industrial signal monitoring
• Digital input expansion in distributed I/O systems
• Building automation and HVAC systems
• Process automation in compact control cabinets

Advantages

• Compact Form Factor: Fits seamlessly into tight control panel layouts
• Flexible Input Mode: Supports both sourcing and sinking input configurations
• Seamless Integration: Plug-and-play expansion with S7-1200 PLCs
• Reliable Operation: Built to withstand industrial environmental conditions
• User-Friendly Diagnostics: Individual input status LEDs simplify troubleshooting