Janz Tec emVIEW emWEB-21 User manual

emWEB-21 (Hardware Manual) •Introduction 1 - 1
Rev. 1.1 © Janz Tec AG
Refers to product revision
V 1.0
emWEB-21
Web panel with browser support
(Hardware Manual)
Version 1.1
PROPRIETARY NOTICE
All rights reserved by Janz Tec AG.
No parts of this technical manual may be modified, copied or reproduced
in any form or by any means for commercial use without the prior written
permission of Janz Tec AG, Germany.
All instructions, information and specification contained in this manual
are for reference only and remain subject to change without
announcement.
Preliminary

1 - 2 emWEB-21 (Hardware Manual) •Introduction
© Janz Tec AG Rev. 1.1
Title:
emWEB-21 hardware manual
File:
J:\AS\Entwicklung\Projekte\HW\emPC\emView\12_Zoll\emVIEW_abgesetzt\doc\ma
nual_emview_12td.doc
Pattern:
j:\as\entwicklung\formulare\entwicklung (ew)\ew_manual.dot
Created:
ime, 08.02.2017
Last Update:
tka, 13.07.2021
© Janz Tec AG 2017
Tel.:
[phone]
FAX:
[phone]
email:
[e-mail]
Internet:
www.janztec.com

emWEB-21 (Hardware Manual) •Introduction 1 - 3
Rev. 1.1 © Janz Tec AG
Contents
1 Introduction 7
1.1 Features ...............................................................................................................................7
1.2 Functional Overview ............................................................................................................7
1.3 Safety Instructions ...............................................................................................................8
1.4 Installation and Maintenance ...............................................................................................8
1.5 Ambient and Environmental Conditions...............................................................................8
2 Installation 8
2.1 Dimensions and mounting information ................................................................................9
2.2 Technical specification.......................................................................................................11
2.2.1 DC main power supply..................................................................................................12
2.2.2 Universal serial bus - USB............................................................................................12
2.2.3 Display ..........................................................................................................................12
2.3 Micro SDcard Replacement ...............................................................................................13
2.4 Battery Replacement .........................................................................................................13
3 Operating System and Drivers 14
3.1 Janz Tec AG Linux Image for emVIEW .............................................................................14
3.1.1 Default configurations ...................................................................................................14
3.1.2 Disk Partitioning information .........................................................................................14
3.1.3 Overlay filesystem (AUFS) ...........................................................................................14
3.2 Optional Software...............................................................................................................15
3.2.1 Google Chromium webbrowser ....................................................................................15
3.2.2 Webmin Configuration Webserver................................................................................15
4 Open Source Licensing 17
4.1 Disclaimer ..........................................................................................................................17
4.2 How to obtain the source code ..........................................................................................17
4.3 Software packages ............................................................................................................17
4.4 Verbatim License Texts .....................................................................................................18
4.4.1 BSD 2-clause "Simplified" License ...............................................................................18
4.4.2 BSD 3-clause "New" or "Revised" License...................................................................19
4.4.3 GNU General Public License v2.0 ................................................................................20
4.4.4 GNU Library General Public License v2......................................................24
4.4.5 GNU Lesser General Public License v2.1 ....................................................................30
4.4.6 eCos license version 2.0...............................................................................................36
4.4.7 IBM PowerPC Initialization and Boot Software.............................................................37
Technical Data 38
5 Product History 39
5.1 Manual History ...................................................................................................................39

1 - 4 emWEB-21 (Hardware Manual) •Introduction
© Janz Tec AG Rev. 1.1
List of Figures
figure 1: emWEB-21 measures ................................................................................................................9
figure 2: emWEB-21 drilling template.....................................................................................................10
figure 3: Block diagram for the internal logic ..........................................................................................11
figure 4: Power connector.......................................................................................................................12
Figure 5 Removing and replacing coin cell battery ................................................................................13
Figure 6 - Webmin overview...................................................................................................................16
Figure 7-webmin kiosk mode ...............................................................................................................16
List of Tables
table 1: emWEB-21 dimensions ...............................................................................................................9
table 3: Power connector assignment ....................................................................................................12
table 5: Display specifications ................................................................................................................12

emWEB-21 (Hardware Manual) •Introduction 1 - 5
Rev. 1.1 © Janz Tec AG
About this Manual
This is the hardware manual for the emWEB-21. It gives all necessary information to users and
programmers of the emWEB-21. We have tried to keep it compact, so there are no special sections for
users and programmers. I.e. everything that can be said about the serial port is said in one place
(connector layout, signal levels and programming hints). Users that are not programmers might
therefore only read the first sections (Introduction and Installation), and come back to the detailed
sections when they need special information.
The manual starts with an Introduction to the emWEB-21. This is some prose that describes the
features and architecture of the emWEB-21. You should already know this if you have bought the
board! It then discusses some topics about Installation of the product.
The rest of the manual then covers technical details about the emWEB-21.
Conventions
If numbers are specified in this manual, they will be either decimal or hexadecimal. We use C-notation
to identify hexadecimal numbers (the 0x prefix).
If we refer to low active signal names, they will suffixed by a “#” character.
Some parts of the text are really important. These are visually marked with the following signs:
Some parts of the manual contain notices you have to observe to ensure your personal safety, or to
prevent damage to property. These are visually marked with the following alert symbols:
DANGER
Indicates that death or severe personal injury will result if proper precautions are not
taken.
WARNING
Indicates that death or severe personal injury may result if proper precautions are not
taken.
CAUTION
Indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
Indicates that damage to equipment can result if proper precautions are not taken.
Indicates information that we think you should have read to save your time by avoiding
common problems. Important suggestions that should be followed will also be marked
with this sign.

1 - 6 emWEB-21 (Hardware Manual) •Introduction
© Janz Tec AG Rev. 1.1
Acronyms and Abbreviations
DVI
Digital Visual Interface
ESD
Electrostatic discharge
HMI
Human Machine Interface
LCD
Liquid Crystal Display
LVDS
Low Voltage Differential Signal, Video signal to the TFT display
SVGA
Super Video Graphic Array
SXGA
Super EXtended Graphics Array
TFT
Thin Film Transistor
USB
Universal Serial Bus
UXGA
Ultra EXtended Graphics Array
VGA
Video Graphic Adaptor, Video Graphic Array
XGA
EXtended Graphics Array

emWEB-21 (Hardware Manual) •Introduction 1 - 7
Rev. 1.1 © Janz Tec AG
1 Introduction
emWEB panel devices are designed to simply visualize machine data provided in web pages, either
in pages of a CODESYS web visualization or in web pages of any other web based environment.
emWEB panel devices are based on a Freescale i.MX6 single core ARM processor. It can be supplied
with 24V power and is connected via an Ethernet interface with the machine network.
1.1 Features
•resistive touch screen (PCT optionally)
•24 V DC power supply
•Fan less cooling concept
•Protection rating of the front is IP65
•High grade aluminium front
•Customizable design of the front panel
1.2 Functional Overview
The emWEBs are normally delivered with a touch-screen. And are normally delivered with Debian
Linux.
The power must be supplied by an external power supply. This power supply must be capable to
provide enough power for the emWEB-21. Please refer to the technical specifications section for more
information.

2 - 8 emWEB-21 (Hardware Manual) •Installation
© Janz Tec AG Rev. 1.1
1.3 Safety Instructions
Refer to page 5 for explanation of the warning notice system.
The product described in this documentation may be operated only by personnel qualified for the
specific task in accordance with the relevant documentation for the specific task, in particular its
warning notices and safety instructions. Qualified personnel are those who, based on their training and
experience, are capable of identifying risks and avoiding potential hazards when working with these
products.
1.4 Installation and Maintenance
NOTICE
The product is intended to be used in industrial environments. Typical applications are
process virtualization.
WARNING: Unauthorized Opening
Improper opening of the device may result in substantial damage to the equipment.
Remove power before you open the housing of the product. Do not connect power or
operate the product until you have closed the housing and tightened all screws.
WARNING: Electrical Shock
The IO interfaces (connectors) of the product are only suited to be connected to SELV
circuits. Use interfaces (connectors) for their intended use only.
1.5 Ambient and Environmental Conditions
WARNING
This product does NOT fulfil the requirements for a fire enclosure according to EN
60950-1 in all possible mounting positions. In these mounting positions, installation is
only permitted above concrete or other non-inflammable materials.
NOTICE: Damage
Do not operate the product beyond the specified ambient conditions. Do not cover the
vent slots of the product.
2 Installation
When opening the shipping package of the emWEB-21, the contents of the package should be
checked immediately.
DANGER: Electrical Shock
Danger to life.
This product operates with 14..32 V DC. Do not connect this product to an improper
power supply.
DANGER: Explosive Risk
This product is NOT designed to be used in potentially explosive atmosphere.
Do not operate this product in potentially explosive atmosphere.
NOTICE: EMI
This product is a class A device. This product may cause radio interference. In this case
the user must take adequate measures.

emWEB-21 (Hardware Manual) •Installation 2 - 9
Rev. 1.1 © Janz Tec AG
The emWEB-21 is delivered in a configured state, but the configurations can be adjusted by the user
as well. To adjust the emWEB-21s configuration, an OSD (On Screen Display) is installed and
controllable by buttons at the backside.
The package also contains a terminal plug for the power connector. The emWEB-21 needs a power
source in between 14 to 30V DC for operation.
The installation of this equipment is allowed for qualified service personnel, only.
Auxiliary existing rules for installation of electrical equipment must be attended to.
2.1 Dimensions and mounting information
figure 1: emWEB-21 measures
The needed cut-out measures are given in figure 2. The overall front panel dimensions are denoted
with W and H. D is the depth of the case. The front has 8 mm thickness.
W
H
D
570.1 mm
366.7 mm
33.6 mm
table 1: emWEB-21 dimensions
W
H
D

2 - 10 emWEB-21 (Hardware Manual) •Installation
© Janz Tec AG Rev. 1.1
figure 2: emWEB-21 drilling template*†
*Not to scale
†Refers to drawing drill_jig_emw12_rev0