|
Color
|
Device
Type
|
Typical
Function
|
Examples
|
|
|
Pushbutton |
Emergency
Stop, Stop, Off |
Emergency
Stop button, Master Stop button, Stop of one or more motors. |
| |
|
|
| Pilot
Light |
Danger
or alarm, abnormal condition requiring immediate attention. |
Indication
that a protective device has stopped the machine, e.g. overload. |
| |
|
|
| Illuminated
Pushbutton |
|
Machine
stalled because of overload, etc. (the color RED for the
emergency stop actuator shall not depend on the illumination
of its light). |
|
|
|
Pushbutton |
Return,
Emergency Return, Intervention - suppress abnormal conditions. |
Return
of machine elements to safe position, override other functions
previously selected. Avoid unwanted changes. |
| |
|
|
| Pilot
Light |
Attention,
caution/marginal condition. Change or impending change of
conditions. |
Automatic
cycle or motors running; some value (pressure, temperature)
is approaching its permissable limit. Ground fault indication.
Overload that is permitted for a limited time. |
| |
|
|
| Illuminated
Pushbutton |
Attention
or caution/Start of an operation intended to avoid dangerous
conditions. |
Some
value (pressure, temperature) is approaching its permissable
limit; pressing button to override other functions previously
selected. |
|
|
|
Pushbutton |
Start-On |
General
or machine start; start of cycle or partial sequence |
| |
|
|
| Pilot
Light |
Machine
Ready; Safety |
Indication
of safe condition or authorization to proceed. Machine ready
for operation with all conditions nornal or cycle complete
and machine ready to be restarted. |
| |
|
|
| Illuminated
Pushbutton |
Machine
or Unit ready for operation/Start or On |
Start
or On after authorization by lights; start of one or more
motors for auxiliary functions; start or energization of
machine elements. |
|
|
|
Pushbutton |
No
specific function assigned |
Shall
be permitted to be used for any function except for buttons
with the sole function of Stop or Off; inching or jogging. |
|
|
|
Pushbutton |
Any
function not covered by thee above. |
Control
or auxiliary function not directly related to the working
cycles. |
| |
|
|
| Pilot
Light |
Normal
Condition Confirmation |
Normal
pressure, temperature. |
| |
|
|
| Illuminated
Pushbutton |
Confirmation
that a circuit has been energized or function or movement
of the machine has been started/Start On, or any preselection
of a function |
Energizing
of auxiliary function or circuit not related to the working
cycle; start or preselection of direction of feed motion
or speeds. |
|
|
|
Pushbutton |
Any
function not covered by the above colors |
|
| |
|
|
| Pilot Light |
Any
function not covered by the above colors |
|
| |
|
|
| Illuminated
Pushbutton |
Any
function not covered by the above colors |
|
