Electrical interference protection arrangement for embedded control computers

Method of protecting hardware modules forming part of a control computer against electrical interference, the method comprising:

• operatively connecting at least one of the modules to an external unit so that electrical signals can be transmitted between each module and the external unit;
• passing the signals from the external unit to each module through interference-preventing means which prevent signal interference that is harmful to the modules from reaching the modules, the interference preventing means including a signal adjusting circuit;
• enclosing the control computer in an outer casing to shield the control computer against interference in the form of electromagnetic radiation;
• enclosing the hardware modules in an inner casing to shield the modules from electromagnetic interference;
• designing the parts of the control computer that are located inside the inner casing in accordance with a personal computer standard and designing the parts of the control computer that are located outside the inner casing in accordance with a standard for use in an industrial environment.

Method of protecting against electrical interference emitted from a control computer that includes hardware modules, the method comprising:

• operatively connecting at least one of the modules to an external unit so that electrical signals can be transmitted between each module and the external unit;
• passing the signals from each module to the external unit through interference-preventing means which prevent signal interference in excess of a predetermined energy level from passing, the interference preventing means including a signal adjusting circuit;
• enclosing the control computer in an outer casing to shield the control computer against interference in the form of electromagnetic radiation emitted from the modulus;
• enclosing the hardware modules in an inner casing to shield the modules from electromagnetic interference:
• designing the parts of the control computer that are located inside the inner casing in accordance with a personal computer standard and designing the parts of the control computer that are located outside the inner casing in accordance with a standard for use in an industrial environment.