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ZAH/ZBH Series Clocks

Uncased - for building into panels/signs

The ZAH/ZBH Series of clocks from RGB Technology designed for panel mounting and all suitable for outdoor use.

IP 66


Display Colour

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Digit Height


Number of Digits


IP Rating


Time Synchronisation


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Documentation and Downloads


The ZAH/ZBH Series of LED clocks from RGB Technology are designed to be easily mounted within a panel or sign, behind a transparent cover.

They are uncased and hence not suitable for wall mounting without an additional case/sign/totem provided by the customer.

These clocks offer an LED display with automatic brightness control, a choice of HH:MM or HH:MM:SS display and are all suitable for outdoor installation.  The 200mm digit height version offers outdoor readability from a distance of 80m (depending on environment).

ZAH/ZBH LED Clocks Technical Details for Online Ordering

  • Input voltage 100 – 240 VAC
  • Select from HH:MM display (4 digits) or HH:MM:SS display (6 digits)
  • IP66 rating perfect for outdoor use
  • For installation within a sign or panel behind transparent cover.
  • Select from Digit Height options 100mm, 200mm
  • IR remote control included
  • LAN communication module included
  • Intuitive user menu
  • Automatic brightness control
  • Displaying time in the 12/24-hour format
  • Time countdown – stopwatch function
  • Select from colours available red, yellow, amber, blue, green and white

Additional Options Available – please contact us for a quote

  • PoE+ power supply (Power Over Ethernet)
  • Displaying temperature (℃, °F) – requires water or air temperature probe
  • Buzzer (acoustic signalling device)
  • Loud buzzer (acoustic signalling device of increased volume)


  • inside buildings: production halls, receptions, swimming pools, workplaces, halls, corridors, waiting rooms, schools
  • outside: over building entrances (as an element of the facade ), open sports facilities
  • stations, platforms, airports, passenger information, logistics centres
  • inside public transport vehicles
  • in pylons, welcome signs, and in street-mounted advertising and information signs

Time synchronisation Options

Time in the clocks can be set manually by the user or using the function of automatic time synchronisation – available in two options: GPS satellite and NTP (Network Time Protocol).

GPS satellite time synchronisation has following advantages,

  • provides precise time synchronisation from the GPS satellites based on atomic standards
  • does not require any configuration
  • does not require the Internet connection
  • operates in every location on the Earth
  • an LED signalling proper signal reception is embedded in the receiver

To take advantage of the satellite time synchronisation, you should equip the clock with the optional GPS Receiver. It is necessary to place the receiver in the location providing the “visibility” of the sky.

NTP (Network Time Protocol) – is a communication protocol supporting precise, stable and safe synchronisation of clocks with any time server through the computer network. A great advantage of this solution is the possibility of simultaneous synchronisation of many devices. The synchronisation may be executed:

  • from your own local time server – the Internet access is not required
  • from a public remote time server – the Internet access is required

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