Parker 404 Product Manual

Parker 404 Product Manual Manual pdf 38 page image

404/406XR Series Product Manual Appendix A - Internal Protection38 Parker Hannifin Corporation1140 Sandy Hill RoadIrwin, PA 15642www.parkermotion.comAppendix A - Internal ProtectionThe 404XR is protected from its environment via magnetically retained Protective Seals. Parker HannifinCorporation has conducted testing to determine the degree to which the positioner is protected by usinga British standard called an Ingress Protection Rating (IP Rating).DefinitionReference: British standard EN 60529 : 1992This standard describes a system of classifying degrees of protection provided by enclosures ofelectrical equipment. Standardized test methods and the establishment of a two digit numeric ratingverify the extent of protection provided against access to hazardous parts, against ingress of solidforeign objects, and against the ingress of water.First Number – The first number indicates protection of persons against access to dangerous parts andprotection of internal equipment against the ingress of solid foreign objects.1 - Protection against access to hazardous parts with the back of a hand, and protected againstsolid foreign objects of 50 mm diameter and larger.2 - Protection of fingers against access to dangerous parts, and protection of equipment againstsolid foreign objects of 12.5 mm diameter and larger.3 - Protection against access to hazardous parts with a tool, and protection against solid foreignobjects of 2.5 mm diameter and larger.Second Number – The second number indicates protection of internal equipment against harmfulingress of water.0 - No special protection provided.Note: Number Indicators above represent only a partial list of IP Rating specifications.Warnings (Points of Clarity) The specification applies to protection of particles, tools, parts of the body, etc., against access to hazardousparts inside the enclosure. This does not cover external features such as switch pinch points, pinch pointscaused by the motion of the carriage, or cable carrier assemblies. The testing method as specified in the standard uses a solid steel rod of the appropriate diameter at aspecified force. The specification does not consider soft or pliable particles. Due to the design of the table andsealing method, a soft particle can compress due to the motion of the table, and reduce its cross-section. Thiscan allow particles to enter the unit. In application, shavings or chips commonly created in a machining operation are a greater concern. If anyedge or dimension of the “chip” is under the appropriate diameter, it can wedge under and start to the lift theseals. This action will allow larger particles to do the same until failure is reached.www.comoso.com