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Digital clocks for displaying time and date -
NDC 100/4 R L20 12DC RS485
-interface RS485

Price without VAT: 316.00 €
Price with VAT: 379.20 €

Ordering code: ZZ0934-6.00


Product Description and Application

The NDC 100/4 R L20 12DC RS485 series digital LED wall clocks are electronic devices which primarily display the current time and date information, but can also be set and used as a stopwatch or countdown, count-up counter/timer.

The clock is especially suitable for use in modern interiors of various public institutions, offices, railway and bus stations, airports, hospitals, shopping centers, banks, production plants and many other places, where its installation provides an aesthetic and practical add-on.

All clock‘s parameters, e.g. time, date, stopwatch, countdown, brightness, the type and duration of displayed information, etc., can be set with an IR remote control, via USB or RS485 connection with PC and special software application NDC_config. The RS485 serial bus interface with Modbus RTU communication protocol allows the clock to be built into a unified time system and synchronized with other clocks in the network, or the master clock. 

During its construction the maximum emphasis was placed on high functional reliability and aesthetic appearance. High-brightness 7-segment LED modules and a gray color tinted cover glass with an anti-reflective coating ensure good readability and a wide viewing angle. The brightness level can be controlled automatically, depending on the ambient lighting conditions, or manually, according to the user's preference.

Installation is easy, the clock is supplied with a wall hanging bracket, power supply adapter 230VAC / 12VDC and installation instructions.

Main Features

  • Digit height 100 mm, readability up to 40 m.
  • Format: HH:MM (hours : minutes) and DD:MM (day : month).
  • High brightness LED modules with wide viewing angle 120°.
  • Alternating of displayed information and its duration can be set from 0 to 99 sec.
  • Automatic or manual LED brightness control (built-in light sensor).
  • Stylish frame made of anodized aluminum profile.
  • Tinted acrylic glass with non-glare surface.
  • Wireless setup using IR remote control or wired setup via USB or RS485 connection with PC.
  • PC software application for setting displayed information and clock functions.
  • RS485 communication interface allows building a unified time network and synchronization with Master clock or GPS receiver.
  • Can be set as Count-up or Count-down timer/counter (with optional trigger input and Relay switch output).
  • Built-in time scheduler for triggering alarm events, e.g. time breaks, work shifts (with optional Relay output).

Standard Accessories

  • Power supply adapter 230 VAC/ 12 VDC, 2 A.
  • Wall mounting bracket with screws and fasteners.
  • Installation instructions and user manual.

Optional Accessories – ordered separately, as needed

  • Remote control IR:
          - At least 1 pc. is necessary to be purchased with the clock.
          - In case of purchasing more clocks, only one remote is needed.
  • External temperature and humidity sensor:
          – THS Sensor 52 12DC RS485, connects to back side connector with cable
  • Relay voltage-free contact switch:
          – Can be used for triggering external device (e.g. acoustic or light alarm).
  • Counter/timer trigger input:
          – Used for triggering counter or timer events (e.g. countdown, count-up, stopwatch)
  • GPS interface and GPS receiver:
          – Used for time synchronization with GPS satellite.


Datasheet (PDF)