User's Manual

7
Chapter 1: Before You Start
Optional Accessories
With Synology accessories, you can customize your Synology NAS to t di󰀨erent business environments without
worrying about compatibility and stability. Visit
www.synology.com/compatibility
for more information.
• Expansion Unit
Model Name Picture Description
DX517
5-bay
2.5"/3.5" SATA expansion
Note:
Your Synology NAS supports up to two expansion units.
Spare Parts
Visit
www.synology.com/products/spare_parts
if you need to replace system fans, disk trays, or power supply
units.
Model Name Picture Description
Disk Tray (Type D9) 3.5"/2.5" HDD Tray With Lock
Fan 92*92*25_1 System Fan 92*92*25 mm
Adapter 120W_1 Adapter 120W Level VI