> For the complete documentation index, see [llms.txt](https://doc.engenius.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.engenius.ai/s21-user-guide/reference/appendix.md). # Appendix #### Safety Information To ensure safe operation of this equipment, please follow these safety instructions: #### General Safety * Only qualified personnel should perform installation, maintenance, or servicing of this product. * Do not operate the server with the cover removed unless instructed by technical support. * Keep the system in a clean, dry, and well-ventilated area. * Do not block any ventilation openings. #### Electrical Safety * Always disconnect all power sources before servicing the system. * Use only properly grounded power outlets and certified power cables. * Avoid operating the server in wet or high-humidity environments. * Never use damaged power cords or connectors. #### Battery Safety * The system may include a lithium coin-cell battery. * Do not attempt to recharge, disassemble, or dispose of the battery in fire. * Replace with the same or equivalent type recommended by the manufacturer. * Dispose of used batteries according to local regulations. *** ### Safety Declaration * This product is intended to be use with a UL Listed Optical Transceiver product, Rated DC3.3V, Laser Class 1. * Warning! This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. *** * element 1a: ![](https://3669901683-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdIIwjfEmgdgoBYBfOBWz%2Fuploads%2FR6WFJAo9ho1C2RsmYkGa%2Fimage.png?alt=media\&token=96b03b7e-c0f9-4827-8734-85fad9f875c5)IEC 60417-6042 (2010-11); and ![](https://3669901683-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdIIwjfEmgdgoBYBfOBWz%2Fuploads%2F6L6SkKcwMwGe0UyAqc1v%2Fimage.png?alt=media\&token=6a0a824c-ee5d-455e-b284-2ccf73b3a3a4)IEC 60417-6172 (2012-09) * element 2: “Caution” or equivalent word or text, and “Shock hazard” or equivalent text * element 3: optional * element 4: “Disconnect all power sources” or equivalent text ***
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