SIMATIC S7-400, digital input SM 421, isolated 16 DI, UC 120/230V Inputs according to IEC1131-2 Type 2.
6ES7421-1FH20-0AA0 – SIMATIC S7-400, Digital input SM 421, 16 DI, UC 120/230V
SIMATIC S7-400, digital input SM 421, isolated 16 DI, UC 120/230V Inputs according to IEC1131-2 Type 2