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UL Class 1 Division 2 & ATEX Zone 2 Hazardous Area Warnings 1. EQUIPMENT LABELED WITH REFERENCE TO CLASS I, GROUPS A, B, C, D, DIV. 2 HAZARDOUS AREAS IS SUITABLE FOR USE IN CLASS I, DIVISION 2, GROUPS A, B, C, D OR NON–HAZARDOUS LOCATIONS ONLY. 2. WARNING – EXPLOSION HAZARD – SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I, DIVISION 2 & ATEX ZONE 2. 3. WARNING – EXPLOSION HAZARD – DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON–HAZARDOUS. ATEX Zone 2 Hazardous Area Requirements In order to maintain compliance with the ATEX Directive, an RX3i system located in a Zone 2 area (Category 3) must be installed within a protective enclosure meeting the criteria detailed below:  IP54 or greater, and  Mechanical strength to withstand an impact energy of 3.5 Joules RX3i Universal Backplane Installation The RX3i system and its components are considered open equipment (having live electrical parts that may be accessible to users) and must be installed in a protective enclosure or incorporated into other assemblies manufactured to provide safety. As a minimum, the enclosure or assemblies must provide protection equivalent to a NEMA/UL Type 1 enclosure or an IP20 rating (IEC60529). The enclosure must be able to adequately dissipate the heat generated by all of the components mounted inside so that no components overheat. A minimum space of at least 102mm (4 inches) as shown below is required on all sides of the RX3i backplane for cooling. Additional space may be required, depending on the amount of heat generated by the equipment during operation. Please refer to the PACSystems RX3i System Manual, GFK-2314, for information about enclosures and heat dissipation. Backplane Orientation Backplanes must be mounted horizontally to meet product performance and reliability specifications by providing adequate airflow around the modules. Other mounting orientations may affect system performance and/or reliability and are therefore not recommended.