Fig. 7 El2904 Ip20 Safety Terminal With Batch Number/ Date Code 50110302 And Unique Serial Num- Ber 00331701; Fig. 8 Elm3604-0002 Terminal With Unique Id Number (Qr Code) 100001051 And Serial/ Batch Num- Ber 44160201 - Beckhoff EK15 Series Documentation