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SM 421 Digital Input Module
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Siemens
6ES7 421-1BH01-0AA0
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Siemens
6ES7 421-1EL00-0AA0
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6ES7 421-1FH20-0AA0
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6ES7 421-7BH01-0AA0
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6ES7 421-7DH00-0AA0
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6ES7421-1BL01-0AA0
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