> 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/s11-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: IEC 60417-6042 (2010-11); and
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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