Machine Safety Electrical Equipment Inspection

IEC 60204-1 CNC, Robot Arm and Industrial Machine Tool Safety Tests

You pressed the Emergency Stop (E-Stop) button at the same moment the robot arm struck the machine, but it didn't stop. This is because the contactor behind the button had already oxidized and become stuck. Does the electrical safety chain on your production machines truly function?

Relevant standards and tests: For the electrical equipment of machines IEC/EN 60204-1 and for the security of portable devices PAT Test You can check out our content.

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Deadly Silent Failures of Machines

CNC lathes, milling machines, presses, injection molding machines, and robotic assembly lines are high-powered industrial equipment that directly threatens the operator's life. The IEC 60204-1 standard defines the safety functions of the electrical equipment (Emergency Stop circuits, Lockout/Tagout – LOTO, Protective cover interlock systems) of these machines.

AES Innovation tests the emergency stop circuit, motor contactor mechanical adhesion, protective cover safety switches (interlock), and control circuit insulation resistance of each machine individually in the factory area according to the TS EN 60204-1 directive, and registers this safety with an inspection certificate.

Machine Electrical Safety Inspection Procedure

Critical Elements Tested in Industrial Machinery:

  • Emergency Stop (E-Stop) Circuit Integrity:
    Pressing all the red mushroom buttons on the machine confirms that the motor actually stops for milliseconds, the contactor retracts, and it does not restart without being reset.
  • Protective Cover Interlock Test:
    When the operator opens the safety cover (enclosure), it is verified whether the machine's power is automatically cut off and whether it will not restart until the cover is closed (interlock switch).
  • Motor Contactor Adhesion Analysis:
    Power contactors, which have developed arc traces on their contacts due to years of wear and tear, are mechanically examined to determine whether they actually cut off the electricity when the E-Stop signal is received.
  • Control Circuit Isolation and PE Continuity:
    The insulation resistance (Megger) between the machine housing and the power line is tested to be within legal limits, and the PE (protective conductor) continuity is tested to be below 0.1 Ohm.
WHY AES INNOVATION?

The machine is running, but the safety chain may have broken.

Production machinery undergoes mechanical maintenance and oil changes; however, safety circuits are often overlooked. An oxidized contactor, a broken interlock cable, or a malfunctioning E-Stop are 'Silent Failures' that threaten the operator's life. AES Innovation, with its Type A inspection body expertise, brings these invisible risks to light.

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International Standards and Related Legislation

Inspections are carried out based on the IEC 60204-1 (Safety of machinery – Electrical equipment of machines – Part 1: General requirements) 2021 edition. Additionally, there are specific sections IEC 60204-32 for lifting machinery and IEC 60204-31 for sewing machines.

Frequently Asked Questions

Machine safety FAQs for production managers and maintenance teams.

During each E-Stop test, the machine stops momentarily and is reset. The AES team coordinates this during shift changes or planned short shutdowns to minimize production loss.

Yes, it is also applied to existing machines as part of standard retrofitting. Points where compatibility cannot be achieved are documented in the report with a 'Risk Assessment' note, and improvement suggestions are provided.

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How can you contact us?

+90 850 532 71 89+90 312 806 45 71info@aesinn.comWhatsApp
+90 530 323 7068
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