Hardware Specifications
Applied Models	Supports creating volumes across different units	23 series:DS1823xs+, DS923+, DS723+ 22 series:DS1522+ 21 series:DS1821+, DS1621xs+, DS1621+, DVA3221 20 series:DS1520+, DS920+, DS720+ 19 series:DS1819+, DS1019+, DVA3219 18 series:DS1618+, DS918+, DS718+, NVR1218 17 series:DS1817+, DS1817, DS1517+, DS1517 16 series:DS916+, DS716+II, DS716+ 15 series:DS1815+, DS1515+, DS1515
	Supports creating volumes on a single unit only	18 series:DS218+ 16 series:DS216+II, DS216+, NVR216 15 series:DS415+
	Notes	For more information on the compatibility of each expansion unit, please refer to this article. Please upgrade to DSM 6.2.1-23824-5 or later version before using it with 15 and 16 series models (excluding DS1515, DS716+, and DS716+II). To have better performance, we recommend creating storage volumes physically located within the same NAS or Expansion Unit, rather than creating volumes across your NAS and Expansion Unit.
Storage	Drive Bays	5
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD
	Hot Swappable Drive*
	RAID Management through Synology DSM
	Notes	Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
External Ports	eSATA Port	1
Appearance	Size (Height x Width x Depth)	157 mm x 248 mm x 233 mm
	Weight	3.91 kg
Power	Power Recovery	Synchronized with the Synology DiskStation
	Power Supply Unit / Adapter	200 W
	AC Input Power Voltage	100V to 240V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption	29.9 W (Access) 2.4 W (HDD Hibernation)
	British Thermal Unit	102.02 BTU/hr (Access) 8.19 BTU/hr (HDD Hibernation)
	Notes	Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Temperature	Operating Temperature	5°C to 40°C (40°F to 104°F)
	Storage Temperature	-10°C to 70°C (15°F to 155°F)
	Relative Humidity	5% to 95% RH
Others	System Fan	80 mm x 80 mm x 2 pcs
	Easy Replacement System Fan
	Noise Level*	21.5 dB(A)
	Notes	Noise Level Testing Environment: Fully loaded with Seagate 1TB ST31000520AS hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
Certification	FCC CE BSMI
Warranty	3-year hardware warranty, extendable to 5 years with EW201 or Extended Warranty Plus
	Notes	Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions. The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)

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Synology DX517 5-Bay Expansion Unit for Synology NAS