Norbit ITS AS 20050 User Manual

Revision 1 2 3 4

Date

2018-07-04

2018-07-31

2018-08-02

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Link Master and Link Client user manual

Technical Note

TN-180106

TABLE OF CONTENTS

1 Preface ........................................................................................................................... 4

2 Link Master ..................................................................................................................... 5

2.1 Link Master connection overview ............................................................................. 5

2.2 Site preparation ........................................................................................................ 5

2.3 Mounting .................................................................................................................. 5

2.3.1 Preparations .................................................................................................... 5

2.3.2 Physical mounting ........................................................................................... 6

2.3.3 Setting up ........................................................................................................ 6

2.4 Back-panel ............................................................................................................... 7

2.4.1 Access to the back-panel ................................................................................ 7

2.4.2 Back-panel layout ............................................................................................ 7

2.4.3 Back-panel connections .................................................................................. 7

2.4.4 Back-panel LEDs ............................................................................................ 8

2.4.5 Setting network address .................................................................................. 9

2.5 Maintenance .......................................................................................................... 10

2.6 Troubleshooting ..................................................................................................... 10

2.6.1 No network communication with the Link Master ........................................... 10

2.6.2 No response from Link Client ........................................................................ 10

2.6.3 Unstable Link Client communication .............................................................. 11

2.6.4 Communication zone is too small .................................................................. 11

2.6.5 Incorrectly set to DHCP or static IP address .................................................. 12

2.7 Safety distance....................................................................................................... 13

2.8 FCC information ..................................................................................................... 13

3 Operation of the Link Master......................................................................................... 14

3.1 Enabling the Link Master ........................................................................................ 14

3.2 Network interface messages .................................................................................. 14

3.2.1 General format .............................................................................................. 14

3.2.2 Connection message .................................................................................... 14

3.2.3 Transaction message .................................................................................... 14

4 Link Clients ................................................................................................................... 16

4.1 Installation .............................................................................................................. 16

4.2 Maintenance .......................................................................................................... 16

4.3 Operation ............................................................................................................... 16

4.4 Safety precautions ................................................................................................. 16

4.5 FCC information ..................................................................................................... 16

5 Company contact information ....................................................................................... 17

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Rev. #

Description

1

New Document.

2

3

Added safety distance in chapter 2.7.

Added chapter 5, company contact information

REVISION HISTORY

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1 PREFACE

The Norbit Link Master and Link Client system is a link master/client communication system
where the Link Master can request information from and transfer information to Link Clients.
Multiple Link Clients may exist, communication with a Link Client that is within the area of
communication is initiated and controlled by the Link Master. Link Clients may at any time
enter or leave the area of communication.

Both the Link Master and the Link Clients use directional communication. The Link Master is
intended to be used for communication with Link Clients at distances of up to 30 feet when
Link Master and Link Client antennas are pointing towards each other. The Link Master is
preferably installed at a fixed position which is higher than Link Clients.

When a Link Master signal is detected, a Link Client automatically wakes up from a low
power sleep state within a few milliseconds. The Link Client will respond to a link
communication invitation from the Link Master. The Link Master can handle multiple Link
Clients at a time by means of an anti-collision protocol.

The data content of a Link Client data are organised in applications which are identified by
Context Marks during an initialisation phase. Each application may constitute of multiple data
fields, some of which may have read-only access and others may have read-write access.

Data transfer is typically initiated and concluded within a few tens of milliseconds. Several
co-located Link Clients may thus be served by the Link Master even when being located
within the Link Master communication area for a short period of time.

The Link Master/client communication system, or any parts thereof, shall not be used for
safety critical purposes, medical applications (including any life-saving or life sustaining
purposes) or any other purpose where its function or failure to function may cause damage,
injury or death. It shall not be used in any area or for any purpose that may be in violation
with local, state or federal laws or regulations.

This document describes how to install, maintain and operate the Link Master and the Link
Clients.

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Power

Supply

Optional

switch

Computer

Ethernet

Power

Link
Master

Link
Clients

2 LINK MASTER

The Link Master consists of a single unit powered by an external power supply. The Link
Master has two communication ports

- Wireless communication port towards Link Clients

- Ethernet connection to external network connected equipment.

The Link Master will at the explicit or implicit request of external network connected
equipment retrieve requested information from and/or transfer requested information to Link
Clients which are present in the communication area.

To ensure optimal operation, the Link Master must be properly installed.

2.1 Link Master connection overview

The principal setup of the system is shown below.

network

2.2 Site preparation

The area between the Link Master and where Link Clients may be located should be
unobstructed. For optimal communication performance, metal structures or larger metal
objects should be kept away from the area forward to the Link Master.

The Link Master should preferably be installed at a height up to 10-15 feet above Link
Clients, pointing downwards at an angle of 35-45 degrees towards Link Clients.

The Link Master may be installed at a pole, in a gantry or in other structure suitable for the
purpose of the communication.

2.3 Mounting

When a suitable Link Master mounting position has been found, the Link Master can be
mounted.

2.3.1 Preparations

To avoid unnecessary work at the installation site, prefabricated cables may be used. They
should be equipped with necessary connectors for the Link Master in one end.

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2.3.2 Physical mounting

The Link Master should be fixed to a bracket allowing adjustment in the required directions.
The figure below shows the Link Master with the optional rotating mounting bracket, allowing
full tilt and swivel adjustment. Other mounting brackets may be used as long as they are not
obstructing the communication link.

To avoid water ingress, it is important with proper cable routing. Also make sure that proper
cable gland and back panel tightening is done.

2.3.3 Setting up

The Link Master requires two external connections:

- Power supply (10.2 – 32Vdc)

- Network connection (10Mbit/100Mbit Ethernet)

Two separate wires or a common wire may be used for the two connections. Connecting to
both is via the back-panel on the Link Master.

Make sure that the pairs are used appropriately in the cable. LAN Tx and Rx should be on
their own pairs. Depending on supply voltage, cable type and cable distance, multiple pairs
may be required for the power supply.

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