Digital Inputs

Code: 6ES7421-7DH00-0AB0

SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 24 - 60 V, alarm, diagnostics

Code: 6ES7421-7BH01-0AB0

SIMATIC S7-400, digital input SM 421, isolated 16 DI; 24 V DC with 0.05 ms input delay alarm, diagnostics

Code: 6ES7421-1FH20-0AA0

SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 120/230V Inputs according to IEC1131-2 Type 2

Code: 6ES7421-1EL00-0AA0

SIMATIC S7-400, digital input SM 421, isolated 32 DI; 120 V DC/AC