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| Place of Origin: | U.K. |
| Brand Name: | Siemens |
| Certification: | COO & COC |
| Model Number: | 6ES7221-1BH32-0XB0 |
6ES7221-1BH32-0XB0 Siemens SIMATIC S7-1200 Digital Input module 24 V DC Source input
The Siemens 6ES7221-1BH32-0XB0 is a high-performance 16-channel digital input (DI) module designed for the SIMATIC S7-1200 programmable logic controller (PLC) system. Engineered for industrial environments, this compact module reliably captures ON/OFF signals from pushbuttons, limit switches, proximity sensors, and other binary field devices—making it essential for machine automation, process control, safety interlocks, and building management applications.
Featuring 24 V DC sink-type (NPN-compatible) inputs, built-in diagnostic LEDs, and seamless integration with TIA Portal, the 6ES7221-1BH32-0XB0 ensures fast commissioning, minimal wiring errors, and long-term operational stability. Its robust design meets stringent electromagnetic compatibility (EMC) standards, while channel-to-backplane isolation protects the PLC CPU from electrical transients in harsh industrial settings.
Product Overview: Siemens 6ES7221-1BH32-0XB0
| Model | 6ES7221-1BH32-0XB0 |
| Type | 16-channel digital input module |
| Input Logic | Sink (NPN), 24 V DC |
| Voltage Range | 20.4 – 28.8 V DC |
| Input Current | ~7 mA @ 24 V |
| Input Delay | ≤ 3 ms (standard) |
Product details pictures
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