6ES7221-1BH32-0XB0 Siemens Digital Input Module - SM1221
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Reliable Digital Input Module: Siemens 6ES7221 for S7-1200 PLC
The Siemens 6ES7221-1BH32-0XB0 digital input module brings reliable signal acquisition to your automation system. With 16 inputs and flexible configuration, it's perfect for industrial control applications.
Key Advantages
- 16 Input Channels - Multiple sensor connections
- Universal Compatibility - Works with sink/source devices
- Easy Configuration - Parameterizable input delays
- Compact Design - Saves control cabinet space
Technical Specifications
- Brand: Siemens SIMATIC
- Model: 6ES7221-1BH32-0XB0
- Input Channels: 16 digital inputs, 24V DC
- Input Voltage: 24V DC (20.4-28.8V range)
- Signal Detection: 15V for "1", 5V for "0"
- Input Current: 4mA typical per channel
- Power Consumption: 2.5W typical
- Cable Length: 500m shielded, 300m unshielded
- Response Time: 0.2ms to 12.8ms (configurable)
- Operating Temp: -20°C to +60°C
- Dimensions: 45×100×75mm
- Weight: 210g
- Protection Rating: IP20
Simple Installation
Quick mounting on S7-1200 rack. Uses standard front connector. Works in all positions.
Quality Assurance
Backed by 12-month comprehensive warranty for peace of mind.
Shipping Information
Available for immediate shipment via FedEx, UPS, or DHL express services.
Common Questions
What types of devices can connect to this 6ES7221 module?
It connects to sensors, switches, and push buttons with 24V DC signals in sink or source configuration.
How many input points are available?
16 separate digital input channels, organized in groups of four for flexible wiring.
Can I adjust the response speed?
Yes, input delay times from 0.2ms to 12.8ms can be set in groups of four inputs.
What's the maximum cable distance?
Up to 500 meters with shielded cable, ensuring reliable signal transmission over long distances.
Is this module suitable for harsh environments?
It operates from -20°C to 60°C and handles 95% humidity, making it suitable for most industrial settings.
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