Schneider Electric SR2MAN01 user manual Normally open mode, Normally closed mode

LD Language Elements

Use as a Contact Auxiliary relays can be used as contacts as many times as necessary.

This contact may use the direct state of the relay (normally open mode) or its inverse state (mode normally closed), see below.

Normally open mode:

Symbol of an auxiliary relay, used as a contact in normally open mode:

M-

A relay used as normally open contact corresponds to the use of the direct state of the relay. If it is powered, the contact is said to be conducting.

Normally closed mode:

Symbol of an auxiliary relay, used as a contact in normally closed mode:

m-

An auxiliary relay used as a normally closed contact, corresponds to the use of

the reverse state (logical complement of the direct state) of the relay. If it is powered, the contact is said to be non-conducting.

SR2MAN01 11/2007 95