Control configurations must prevent safety devices (like light curtains or interlocks) from being inadvertently bypassed during standard operations. 4. Emergency Stop Functions
The standard highly recommends using transformers to isolate control circuits, typically utilizing 24 V AC or DC to minimize shock risk. Stop Functions: Category 0: Immediate removal of power (uncontrolled stop).
Typically powered via isolating transformers with a preferred voltage (e.g., 24V DC or 110V AC).
The standard is the cornerstone of electrical safety for machinery within the European Union and many global markets. Titled "Safety of machinery - Electrical equipment of machines - Part 1: General requirements," this harmonized standard provides the definitive guidelines for designing, building, and testing electrical systems on industrial machines. en 602041 pdf
Clear color-coding is required: for protective conductors (PE), Light Blue for neutral conductors, and specific conventions for AC and DC control circuits.
Issues the BS EN 60204-1 version in English.
The standard outlines several key requirements for electrical control systems: Stop Functions: Category 0: Immediate removal of power
Verification of the automatic disconnection of supply conditions.
1. Incoming Supply Connection and Disconnecting Devices (Clause 5)
Must be a Category 0 (immediate removal of power) or Category 1 (controlled stop, then removal of power) function, overriding all other operations. 4. Wiring Practices and Conductor Sizing Titled "Safety of machinery - Electrical equipment of
Promoting standardization in design.
Electrical cabinets must require a tool or key to open, or automatically disconnect power when opened, preventing unauthorized or accidental access to live components. Required Verification and Testing (Clause 18)