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6ES7421-1FH00-0AA0
Product Code: 187
![6ES7421-1FH00-0AA0](https://images.findtheneedle.co.uk/findtheneedle/products/2925410.jpg)
Simatic S7-400, SM 421 Digital Input Module, Optic. Isolated, 16 DI, 120/230V AC
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