Sales of Siemens PLC module 6ES7421-7DH00-0AB0 S7-400 expansion module SM421
SIMATIC S7-400, digital input SM 421, potential isolation 16 DE; UC 24 – 60V, alarm, diagnosis
Introduction
SIMATIC S7-400, digital input SM 421, potential isolation 16 DE; UC 24 – 60V, alarm, diagnosis
