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Description

The SM 1221 unit provides 8/16 digital inputs depending on the model of the module used. Like the rest of the input modules, the logic zero is at 5V and the logic one is at 15V. It allows flexible adaptation of the controller to the task at hand. The difference between this module and the others is that it can connect a cable up to 500m long. Diagnostics is at the same level as with all other modules in the series, it contains LED indicators and alarm errors.

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SiemensSM 1221

Name: SM 1221
Brand: Siemens
SKU: db-p-1231
Rating: 90 (29 reviews)

Updates(1)

Latest software or firmware version: V2.0.2

Improvements

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Compatibility(2)

The Simatic S7-1200 SM 1221 is a digital input module designed to integrate with the S7-1200 and allow connection to digital signals into the CPU.

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Siemens SM 1221 Updates

Update05/21/2019

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Compatible Products

Siemens
S7-1200

22 22 75

PLC Controllers

Siemens
SIPLUS extreme S7-1200

9 0 60

PLC Controllers

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