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IEC Symbols

Former Community Member
Former Community Member
Looking for help identifying these electrical symbols. Some are light and some are dark. What does that mean? Are they light and dark operated photo eyes? IEC Symbol.jpeg
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  • Former Community Member
    0 Former Community Member
    Thanks for all your inputs! They are tied to PLC inputs. Some are labeled as a reference switches, overtravel switches and position switches. I'm not sure why they would be time delayed, but maybe.
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  • Former Community Member
    0 Former Community Member
    Thanks for all your inputs! They are tied to PLC inputs. Some are labeled as a reference switches, overtravel switches and position switches. I'm not sure why they would be time delayed, but maybe.
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