Elen NDC 100/4 R L20, Руководство пользователя

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Digital clocks – NDC Series / User Manual v. 2.11
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2.7 Power supply
Standard 230 VAC/50 Hz,12 VDC and 24 VDC for extra fee.
2.8 System time network
• Possibility to create unified time systems in an NDC-net without the necessity to use special master clock.
The unified time network may contain NDC clocks, GPS receiver, a synchronisation time module (Network
Time Server RS485), remote sensors (e.g. of temperature), remote buttons to control stop watch and the
counter and a remote output module (relay), controlled by the so called Master clock (i.e. standard NDC
clock setup as the Master, see below).
• Adjustable network clock synchronisation interval in the range 0 – 255 min (only the Master clock).
2.9 NDC-net communication network
At the physical level, the communication network is made by an RS485 interface with the baud rate 9600.
Devices with addresses 1 – 127 may be connected to the NDC-net bus, while there must be one NDC type
device with a dedicated address 1 in the function of the Master in the system. The bus negotiation and
communication control is always controlled by the Master device.
Devices connected to the bus may be of the following types:
• NDC clock – It displays data and, together with a remote controller, provides a user interface for the setting
and controlling of the system. The network must contain one NDC clock with the address set to 1 (Master
clock), which provides the control of the NDC-net.
•
Synchronisation device – its role is to provide precise time to the rest of the devices. The source of that
time may be a GPS signal, DCF-77, a PC, an embedded module with an RS485 line and a protocol
converter to the NDC-net.
•
Sensors – Within the range of the NDC-net they measure general quantities (usually temperature, but also
humidity, pressure,...) and, after their processing, they send the data along the network to NDC devices
for displaying. Data from one of two sensors may be allocated to each NDC clock. The sensor modules
will complement the offer depending on the demand on the market and the development possibilities.
•
Remote buttons – They allow to place buttons for controlling the stop watch and the counter into a longer
distance from the controlled NDC within the NDC-net.
• Remote access – allows to place the switching relay or an open-collector type output to a longer distance
from the controlling NDC within the NDC-net. This output may be controlled only by the Master clock.
3 DISPLAY ACCESSORIES
Depending on the selected version of the connection of displays, the supply is complemented with the
necessary accessories.
3.1 Standard accessories
Type of display Standard accessories
NDC 57/4
Power supply cable
flexible 1.5 m.
NDC 57/6
NDC 100/4
NDC 100/6
NDC 160/4
Connector for the
power supply cable.
(Cable is not supplied.)
NDC 160/6
NDC 212/4
NDC 212/6
3.2 Optional accessories
• Handheld IR Remote Control – for setting clock parameters.
(Parameters such as time, date, on/off time period of each displayed value, brightness, etc.).
• Temperature sensor – for displaying local or remote temperature (as per type ordered).
• GPS Time Receiver – for automatic time/date synchronization with GPS
(GPS Timer Receiver cable length can be 5 m or 10 m max., depending on type ordered).
Several modules can be connected to NDC series clocks and to the NDC-net through a communication bus
based on RS485, which communicate with the NDC-protocol. The range of such modules is widened
continually.
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4 INSTALLATION OF A DISPLAY
4.1 Display mount
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.
Note: Rubber bumpers can be already placed from the factory.
4.2 NDC 57/x, NDC 100/x displays, 230 VAC power supply
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.
4.3 NDC 160/x, NDC 212/x displays, 230 VAC power supply
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.
4.4 Connection of displays in the NDC-net
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.
4.5 Connection of GPS Time Receiver
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).
4.6 Connection of communication modules and optional accessories
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).