Siemens SM 1221 DC – 6ES7221-1BH32-0XB0
- Digital inputs as supplement to the integral I/O of the CPUs
- For flexible adaptation of the controller to the relevant task
- For subsequent expansion of the system with additional inputs
Digital input modules allow the connection of the controller to digital signals of the process.
This provides users with the following advantages:
- Optimum adaptation:
With signal modules which can be mixed as desired, users can adapt their controllers exactly to the relevant task. This avoids superfluous investments. Modules with 8, 16, and 32 input/output channels are available.
If the task is expanded subsequently, the controller can be upgraded. Updating of the user program is extremely simple.
The SM 1221 digital input signal modules convert the level of the external digital signals from the process into the internal signal level of the S71200 plc controller.
SIMATIC S71200, Digital input SM 1221, 16 DI, 24 V DC, Sink/Source. Using the digital output module SM 1221 DC – 6ES7221-1BH32-0XB0 from Siemens S7 1200 controller can be expanded by 16 digital inputs. The digital input SM 1221 DC – 6ES7221-1BH32-0XB0 plc s7 1200 siemens processes input signals with a voltage of 24 V DC.
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