Description*/* Brand ZyXEL Model NAS540 4-Bay CPU Model ARM Cortex-A9 Dual Core 1.2 GHz System Memory DDR3 1GB Drive Interface 2.5″ or 3.5″ SATA II Hot swappable HDD support Number of Drives 4 Bay Capacity Max support up to 48 TB (12 TB x4) USB Interface 3 x USB 3.0 ports LAN Interface 2 x Gigabit Ethernet RJ-45 connectors Memory Slot 1 x SDXC card read (Up to 128 GB) Buttons Power button Copy/Sync button Reset button Networking CIFS/SMB for Windows NFS for Linux/Unix AFP for Mac DHCP client PPPoE Network Time Protocol (NTP) iSCSI RAID JBOD, RAID 0/1/5/6/10, RAID 5+ Hot Spare Security Support HTTPS and FTPES (FTP over explicit TLS/SSL) Encrypted NAS to NAS remote replication Encrypted NAS to external disk archive backup Management JBOD, RAID 0/1/5/6/10, RAID 5+ Hot Spare Online firmware upgrade Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.) File system Internal HDD: EXT4 External HDD: NTFS, EXT2, EXT3, EXT4, FAT32, HFS+ (read only) Cooling Fans Smart fan design Power Supply Input : 100 – 240 V AC, 50/60 Hz Output : 19 V DC, 4.74 A Power Consumption Access mode : 36.5 watt (Max) Hard disk spin-down mode : 14.8 watt Environment Operating Temperature: 0°C to 40°C (32°F to 104°F) Operating Humidity: 10% to 95% (Non-condensing) StorageTemperature: -30°C to 70°C (-22°F to 158°F) StorageHumidity: 10% to 95% (Non-condensing) Certification Safety : CE LVD, BSMI EMC : CE, FCC class B, C-Tick, BSMI Others : DLNA 1.5, UPnP
