Installation Of A Display; Display Mount; Ndc 57/X, Ndc 100/X Displays, 230 Vac Power Supply; Ndc 160/X, Ndc 212/X Displays, 230 Vac Power Supply - Elen NDC 57/4 R L20 User Manual

Table of Contents

INSTALLATION OF A DISPLAY

The display is mounted to the wall by means of brackets on the rear side using supplied screws or similar ones

with pan or button head. Head of the screw should protrude from the wall so that the display can be hanged

easily. If there are self adhesive rubber bumpers included with the package, place them to the lower corners

of the rear panel, like on the picture.

Connect a two-wire power supply cable to the power supply terminal on the display's power supply board. The

terminals are accessible after the removal of the tiltable part of the rear wall. The cable goes through the

bushing in the tiltable part, marked as "230 V". The standard length of the cable is about 2 m. The device

includes a melting fuse, located on the power supply board. The details of the power supply terminals can be

found in the circuit diagram.

The mains power supply connector at the back of the display is marked as "AC 230V". The connection of the

mains power supply 230 VAC is done through a 4-pole mains power supply connector with an outlet for the

connection of the PE wire. The type of connector and the connection of its pins can be found in the connection

diagram. A melting fuse is used in the device and it is located on the power supply board.

Communication connectors are used for the connection of the displays into the communication network. The

connectors are located at the back of the display and they are marked as "RS485" and "17 V / RS485". The

type of the connector used and its connection are described in detail in the clock's circuit diagram. If some

voltage is outlet on a connector's contacts (e.g. +17 VDC, GND), that voltage is then used for powering

modules from the optional accessories (temperature sensor, GPS receiver, ...).

The displays are interconnected in parallel by a two-wire or, if necessary, 3-wire communication cable,

according to the recommendations for the RS485 interface. The manufacturer recommends to use the FTP

24AWG 4x2x0.53 CAT5 cable, which is largely used in the creation of structured cabling of computer networks.

Only one or two pairs of wires of the cable are used.

The clock is equipped with input "GPS RECEIVER, 5V / RS232", for connecting a GPS Time Receiver. GPS

Time receiver is available as optional accessory in two versions:

1. GPS Time Receiver, cable length 5 m, chipset u-Blox 6, sensitivity -162 dBm.

2. GPS Time Receiver, cable length 10 m, chipset u-Blox 8, sensitivity -167 dBm (higher sensitivity).

Communication connector (15V / RS485) allows to connect various communication modules offered as

optional accessories (Network Time Server RS485, remote thermal sensor, etc.).

The modules can be powered by the voltage from the clock, taken out to the communication connectors. In

such a case the module is galvanically connected to the clock and to the NDC-net. Such a solution is

usually suitable when no clock network is created (i.e. 1 clock is interconnected with just 1 module); when the

distance between the clock and the module is short (up to about 5 m) or in an environment without industrial

interference (however at maximum distance of about 20 m).

Digital clocks – NDC Series / User Manual v. 2.11

Note: Rubber bumpers can be already placed from the factory.

Table of Contents

Ndc 100/4 r l20 Ndc 100/6 r l20