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Product description
Siemens SM 1221 DC - 6ES7221-1BH32-0XB0
Using the digital output module SM 1221 DC - 6ES7221-1BH32-0XB0 from Siemens your SIMATIC S7-1200 controller can be expanded by 16 digital inputs. The digital input SM 1221 DC - 6ES7221-1BH32-0XB0 processes input signals with a voltage of 24 V DC.