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SM 421 digital input module
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Product No. / Product Description
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Listprice / Your price
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SIMATIC S7-400, digital input SM 421, isolated 32 DI; 24 V DC
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SIMATIC S7-400, digital input SM 421, isolated 32 DI; 120 V DC/AC
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SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 120/230V Inputs according to IEC1131-2 Type 2
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SIMATIC S7-400, digital input SM 421, isolated 16 DI; 24 V DC with 0.05 ms input delay alarm, diagnostics
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SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 24 - 60 V, alarm, diagnostics
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