Siemens 6ES7221-1BH32-0XB0 S7-1200 Digital Input Module 16-DI 24VDC 6ES72211BH320XB0

Description:

The Siemens 6ES7221-1BH32-0XB0 digital input module is used in S7-1200 PLC automation systems. Commonly installed in industrial control panels, manufacturing lines, and machine automation systems. Maintenance teams, OEMs, and system integrators use this part for replacement, retrofit, and digital input expansion.

Applications:

The Siemens 6ES7221-1BH32-0XB0 input module is used in industrial automation to interface field devices such as sensors, switches, and pushbuttons with PLC systems. It is widely deployed in manufacturing plants, packaging machines, conveyor systems, and process control environments where reliable signal acquisition is required. Designed for SIMATIC S7-1200 systems, it enables efficient monitoring of discrete signals and supports scalable automation architectures.

Technical Specifications:

• Manufacturer: Siemens
• Model / Part Number: 6ES7221-1BH32-0XB0
• Product Type: Digital Input Module (SM 1221, S7-1200)
• Input Channels: 16 digital inputs
• Input Voltage: 24 V DC (20.4–28.8 V range)
• Input Type: Sink/Source (PNP/NPN compatible)
• Input Current: Approx. 4 mA per channel
• Backplane Current Consumption: 5 V DC, max. 130 mA
• Dimensions: Approx. 45 × 100 × 75 mm
• Weight: Approx. 0.19–0.21 kg
• System Compatibility: SIMATIC S7-1200 PLC
• Mounting: DIN rail

Common Replacements:

• Siemens 6ES7221-1BH30-0XB0
• Siemens 6ES7221-1BH50-0XB0
• Siemens 6AG1221-1BH32-2XB0