5. Programming on the device
5.3 Circuit diagram elements
5.3.3 Contacts
You modify the current flow with the contacts in the easyE4 circuit diagram. Contacts
such as N/O contacts are set to 1 when they are closed and 0 when they are opened.
In the easyE4 circuit diagram you can wire contacts as make or break contacts. 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
the contact fields of the circuit diagram.

Switching contact

Look
N/O contact, i.e., normally open
contact

I, Q, M, A, …
N/C contact, i.e., normally closed
contact

I, S, S, A, …
A detailed list of all contacts used in the circuit diagram is provided on → Section
"Function blocks", page 241
Tab. 75: Usable contacts
190
easyE402/24 MN050009ENEaton.com
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