Indicator and Alarm Symbols Meaning
 |
Bell, electric |
 |
Buzzer |
 |
Horn – General |
 |
Annunciator – General |
 |
Indicating Light – General Use the following to specify color
|
Relay Symbols Meaning
The following methods are used on drawings to identify relays
 |
Two (2) 64 devices 64-1 and 64-2 in same cell. |
 |
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. |