Because different color code systems correspond to different industrial control system standards and usage habits, they are mainly designed to make electrical wiring more intuitive and standardized, avoid misconnection, and improve safety and maintenance efficiency.
What do the various color codes mean?
| Color Code Type | Usage | Features | Application Areas |
|---|---|---|---|
| DC Color Code | DC control systems | Commonly used for 24V DC control signals | Sensors, PLCs, digital I/Os |
| AC Color Code | AC control systems | Suitable for 120V / 230V AC wiring | Motor control, contactors, indicators |
| NAMUR Color Code | Intrinsically safe systems | Designed for intrinsically safe sensor wiring | Petrochemical, gas, hazardous areas |
How to choose?
1. Select according to system voltage/type:
- If your system is 24V DC control: select DC color code
- If it is an AC control circuit: select AC color code
- If it is used in an explosion-proof intrinsically safe environment: select NAMUR color code
2. Select according to the terminal device interface standard:
- Are there any requirements for the color of the matching junction box or device terminal? Then you must match the color code!
3. If you are not sure, check the requirements of the other end device or ask the original factory technical support.
Premier Cable also offers M23 Cordsets in a variety of color codes and supports customized wire sequences and markings to help customers quickly deploy various control systems.
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