Article Number (Market Facing Number)：6ES74211FH200AA0 | 6ES74211FH200AA0
Product Description：SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 120/230V Inputs according to IEC1131-2 Type 2
Product family：SM 421 digital input module
Product Lifecycle (PLM)：PM300:Active Product