SIMATIC S7-400, digital input SM 421, isolated 16 DI, UC 24 – 60 V, alarm, diagnostics.
6ES7421-7DH00-0AB0 – SIMATIC S7-400, Digital input SM 421, 16 DI, UC 24 – 60 V, alarm
SIMATIC S7-400, digital input SM 421, isolated 16 DI, UC 24 – 60 V, alarm, diagnostics