| Standard | Relationship | |----------|---------------| | IEC 60204-1 | Machine safety — references 60073 for control coding | | ISO 7010 | Safety signs (complementary color meanings) | | ISO 13850 | Emergency stop — red actuator requirement aligns | | IEC 61310 | Indication, marking, actuation (three-part series) |

Headline: Decoding Safety: Why You Need IEC 60073 for Your HMI Design

Post Body:

Ever looked at a machine control panel and wondered: Why is the emergency stop always red? Why is the start button green?

The answer lies in IEC 60073 – the often-overlooked bedrock of industrial safety and usability.

While many engineers chase the latest HMI software, they forget the basics of human psychology. IEC 60073 defines the mandatory colour and light coding for indicators and actuators.

Here’s the cheat sheet you need (straight from the standard):

Why you should download the IEC 60073 PDF:

The Catch: The official PDF is copyrighted (IEC Webstore). But you need the latest edition to avoid legacy mistakes.

👇 Drop a comment if you need help locating a legitimate summary or the official purchase link.

#IEC60073 #HMIDesign #MachineSafety #IndustrialAutomation #PLCProgramming #SafetyStandards

The most referenced section of the IEC 60073 PDF is the color-coding table. Below is a summary based on the 2002 edition:

| Color | Meaning for Indicators (Lights) | Meaning for Actuators (Buttons) | Typical Application | |-------|--------------------------------|--------------------------------|---------------------| | Red | Danger, emergency, fault | Stop, emergency stop | E-stop button, overheat alarm | | Yellow/Amber | Warning, abnormal, attention | Restart or intervene | Temperature warning light | | Green | Safe, ready, normal operation | Start, enable | Machine start button | | Blue | Mandatory action (operator needed) | Reset | Reset after fault | | White | Neutral or general info | Any function (if no conflict) | General status lamp | | Black/Grey | Not used for indicators | Start/stop (if red not used) | Auxiliary controls |

Critical Note: Under IEC 60073, you must never use a red indicator for "normal power on" or green for an emergency stop. Violations can lead to failed safety inspections and liability in accidents.

Yes, indirectly. Virtual buttons on an HMI should follow the same color meanings. However, tactile coding does not apply to touchscreens.