SIMATIC S7-400, digital input SM 421 6ES7421-1FH20-0AA0
SIMATIC S7-400, digital input SM 421, galvanic isolation 16 DE; UC 120/230V input according to IEC1131-2 type 2
Introduction
SIMATIC S7-400, digital input SM 421, galvanic isolation 16 DE; UC 120/230V input according to IEC1131-2 type 2
