Indicator and Alarm Symbols Meaning
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Bell, electric |
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Buzzer |
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Horn – General |
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Annunciator – General |
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Indicating Light – General Use the following to specify color
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Relay Symbols Meaning
The following methods are used on drawings to identify relays
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Two (2) 64 devices 64-1 and 64-2 in same cell. |
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Three (3) 27 devices 27-1, 27-2 and 27-3. The two (2) below the 27-2 device indicates there are two (2) 27 devices and their squence numbers are in numerical order starting with -2. |