Siemens SM1221 Digital input, 8DI, 24VDC, sink/sourceProduct Overview The SIMATIC S7 1200 Digital Input Module SM 1221 provides compact 8 channel digital input monitoring with 24V DC sink source capability specifically designed for S7 1200 controller expansion. Featuring parameterizable input delays and grouped channel configuration, this module delivers efficient signal processing for modern industrial automation systems requiring flexible I O expansion in space constrained installations. Key Features
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Siemens SM1221 Digital input, 8DI, 24VDC, sink/source