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6-Digit NTP Digital Clock

The NTDS16 digital clock from Masterclock is a 6-digit digital clock that syncs to any NTP (Network Time Protocol) source for accurate traceable time.

The unit configures to time zone and daylight savings time parameters and can be powered via PoE. WinDiscovery software is included.


  • 1 in (2.5 cm) 6-digit LED display available in red, green, blue or amber
  • Syncs to any NTP or SNTP source for accurate traceable time
  • Retains time and date during loss of power and/or reference using a battery backed real-time clock (RTC) chip and maintenance-free rechargeable battery
  • Configures to time zone and daylight saving time parameters
  • WinDiscovery software utility included - provides easy configuration of clocks and generators attached to network
  • Fully configurable network settings, including DHCP / BOOTP / STATIC IP
  • Configuration is saved to non-volatile memory and survives power losses
  • Password protection prevents unauthorized clock configuration tampering
  • Display time in 12- or 24-hr format – hh:mm:ss
  • Display time & date or UTC & local time
  • Display date – mm:dd:yy, dd:mm:yy or yy:mm:dd
  • Configurable to alternate showing date and time automatically
  • Adjustable brightness levels
  • Visibility: 50 feet (15 meters)
  • Dry contact relay option
  • PM indicator


  • Ethernet RJ45
  • DC input
  • USB for configuration
  • IEC C5 A/C Power
  • Choice of – IEC AC, POE (Power over Ethernet IEEE802.3af) or DC (24 VDC)
  • International IEC AC 90-240v, 50/60 Hz
  • Power consumption < 8W
Operating Parameters
  • Temperature: 0 to 60°C
  • Humidity: Up to 90% (non-condensing)
  • Black powder-coated steel chassis
  • Surface mount (desktop version)
    • Size: 10.7w x 1.7h x 3.5d in (27.2w x 4.31h x 8.9d cm)
    • Weight: 1.0 lbs (0.45 kg)
  • Rack-mount
    • Size: 16.9w x 1.7h x 3.5d in (43w x 4.31h x 8.9d cm)
    • Weight: 1.73 lb (0.78 kg)
  • FCC, ROHS, CE Marked, ANSI

  • Surface mount (desktop version)
  • Rack mount (NTDS16-RM)


Technical documents

Associated products