5. Programming on the device5.3 Circuit diagram elements5.3.3 ContactsContacts are used to change the power flow inside the easyE4 circuit diagram.Contacts such as N/O contacts are set to 1 when they are closed and 0 when they areopened. In the easyE4 circuit diagram you can wire contacts as make or break con-tacts. N/C contacts are indicated with a horizontal line above the operand concerned.An easyE4 device operates with different contacts that you arrange in any order in thecontact fields of the circuit diagram.Switching contact LookN/O contact, i.e., normally opencontactI, Q, M, A, …N/C contact, i.e., normally closedcontactI, S, S, A, …For a detailed list of all the contacts used in the circuit diagram, please refer to → Sec-tion "Function blocks", page 166Table 54: Usable contactseasyE4 11/18 MN050009 EN www.eaton.com 125
