Catalog > Consumer Electronics > Computer Peripherals > Computer Adaptors > Others 6ES7221-1BH32-0XB0 SIMATIC S7-1200, Digital input SM 1221, 16 DI, 24 V DC, Sink/Source Part No: 6ES7221-1BH32-0XB0 Call for Price (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE