How to reduce coupling when routing industrial servo wiring harnesses?

Optimizing the routing of wiring harnesses within the servo cabinet is crucial for reducing inter-wire coupling and simplifying EMC design. Etymotic's wiring principles are:

1) Classification and Layering: Group wiring harnesses by type: power harnesses (motor wires, main power), control harnesses (I/O, communication), and signal harnesses (encoders, analog signals). Each group of harnesses should be bundled separately and separated using different cable trays or partitions.

2) Minimum Parallelism: Avoid long parallel runs between different groups of harnesses. If unavoidable, the minimum spacing should be >20cm.

3) Perpendicular Crossing: When different groups of harnesses must cross, they should cross perpendicularly whenever possible.

4) Keep Away from Noise Sources: All harnesses should be kept away from high-noise equipment such as inverters and switching power supplies.

5) Shorten Length: Minimize harness length while meeting maintenance requirements.

Following these principles can reduce inductive coupling between power and signal lines by more than 60%, significantly reducing the burden of subsequent filtering and shielding, resulting in a cleaner cabinet interior and improved heat dissipation and maintenance.