ISKRAEMECO AC550 User manual

AC550/AC750
User manual

V1.10 –English i/ix
User manual
AC550/AC750
INTRODUCTION
COPYRIGHT
© 2018 ISKRAEMECO, d.d. All rights reserved.
No part of this document can be copied, reproduced, transferred, distributed, presented or stored in any for-
mat without the prior written consent of Iskraemeco, d.d., except as otherwise provided in your license or as
expressly permitted in writing by Iskraemeco, d.d.
TRADEMARKS
The trademarks and brand names represented in this manual, including corporate logos and emblems, are
property of Iskraemeco, d.d. and subject of protection of applicable laws. All rights reserved.
DISCLAIMER AND LIMITATION OF LIABILITY
This document was written for use of AC550/AC750 device. This document, including all documentation in-
corporated by reference herein, such as documentation provided or made available at Iskraemeco d.d. web-
site, is provided or made accessible "AS IS" and "AS AVAILABLE" and without condition, endorsement,
guarantee, representation, or warranty of any kind by Iskraemeco d.d. and its affiliated companies (hereinaf-
ter collectively referred to as ”Iskraemeco”). Iskraemeco assumes no responsibility for any typographical,
technical, or other inaccuracies, errors, or omissions in this documentation, nor for any loss due to the use of
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documentation; however, Iskraemeco makes no commitment to provide any such changes, updates, en-
hancements, or other additions to this documentation. Iskraemeco shall not be liable for any type of dam-
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TION MAY NOT APPLY. ISKRAEMECO'S TOTAL LIABILITY FOR ALL DAMAGES, LOSSES AND CAUSES OF
ACTION (WHETHER IN CONTRACT, TORT, INCLUDING NEGLIGENCE, OR OTHERWISE) SHALL BE DE-
FINED WITH THE CONTRACT WITH WHICH YOU BOUGHT THE PRODUCT OR SERVICE. IF LIABILITY IS
NOT DEFINED WITHIN THE PREVIOUSLY MENTIONED CONTRACT, ISKRAEMECO’S LIABILITY FOR ANY
AND ALL DAMAGE EVER RELATED TO THIS DOCUMENTATION SHALL NOT EXCEED (IF NOT OTHERWISE
DEFINED WITH APPLICABLE LAW) THE AMOUNT: 1) PAID FOR THE PRODUCT/SERVICE AND ITS DOCU-
MENTATION, 2) OF 20% OF THE VALUE OF THE CUSTOMER’S ORDERS FROM THE LAST12 MONTHS BE-
FORE THE OCCURRENCE OF DAMAGE, OR 3) 10 000 EUR, WHICHEVER THE LOWEST.
Document code:
EAK 020.616.311
Version:
V1.10
Language:
English
Date:
13.07.2018

V1.10 –English ii/ix
User manual
AC550/AC750
INTRODUCTION
AC550/AC750
ADVANCED MODULAR GATEWAY / DATA CONCENTRATOR
USER MANUAL

V1.10 –English iii/ix
User manual
AC550/AC750
INTRODUCTION
i. About this document
This document contains detailed information on the AC550 and AC750, their key features, functionalities,
and installation manuals with maintenance.
The document is intended for a technical audience, who are responsible for the product and its integration into
the system.
ii. Reference documents
Iskraemeco’s general terms and conditions
Technical descriptions of modules
Technical description of antenna coupler
iii.Versioning
Date
Version
Update
21.03.2017
V0.10
The draft version of the document.
01.03.2018
V1.00
The initial version of the document.
13.07.2018
V1.10
Added new functionalities (software (FW) version 2.0.5447):
-Security on management interface (HTTPs)
-GW protocol (according to DLMS UA 1000-2 Ed. 8.0:2014, chapter 10.7)
-Support for 3G/2G module (AC150-A3)
Miscellaneous improvements on the Web User Interface

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AC550/AC750
INTRODUCTION
iv.Definitions, Acronyms and Abbreviations
AC
Alternating Current
AMI
Advanced Metering Infrastructure
APN
Access Point Name
CENELEC
European Committee for Electrotechnical Standardization
COSEM
Companion Specification for Energy Metering
CSS
Cascading Style Sheets
CMUX
Converter-MUltipleXer
CSV
Comma Separated Values file, which allows data to be saved in a table-structured format
CPU
Central Processing Unit
DC
Data Concentrator (AC750)
DHCP
Dynamic Host Configuration Protocol
DIN
Deutsches Institut für Normung
DLMS
Device Language Message Specification
DNS
Domain Name System/Server/Service
EAP
Extensible Authentication Protocol
EN
European Norm
ESD
ElectroStatic Discharge
FCC
Federal Communications Commission
FEM
Field Exchangeable Module
FLASH
Electronic (solid-state) non-volatile computer storage medium that can be electrically erased and reprogrammed
FQDN
Fully Qualified Domain Name
G3-PLC
Communication technology with lowlayer protocol for enabling large-scale infrastructure on the electrical grid
GND
Ground
GPRS
General Packet Radio Service
GRE
Generic Routing Encapsulation
GSM
Global System for Mobile
GW
Gateway (AC550)
HES
Head-End System
HTML
HyperText Markup Language
HTTP
Hypertext Transfer Protocol
HTTPS
HyperText Transfer Protocol Secure
HW
HardWare
ICCID
Integrated Circuit Card IDentifier
ID
IDentification
IEC
International Electrotechnical Commission
IMEI
International Mobile Equipment Identity
IP
Internet Protocol
LAN
Local Area Network
Last gasp
the other name of functionality Push on power down
LED
Light Emitting Diode
Linux
free and open-source software operating system
LiSOCl
Lithium Thionyl Chloride
LOC
LOCal
MAC address
Media Access Control address
NAN
Neighbourhood Area Network
NC
Not Connected
Node
In Web user interface means attached device
NTP
Network Time Protocol
P2P
Peer-to-peer
PAN
Personal Area Network
PPE
Personal Protective Equipment
pw
password

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AC550/AC750
INTRODUCTION
OVC
OverVoltage Category
PLC
Power Line Communication
PSK
Pre-Shared Key
RAM
Random-Access Memory
RBAC
Role Based Access Control
RFC
Request For Comments
RSSI
Received Signal Strength Indicator
RTC
Real Time Clock
RX
receive
SIM
Subscriber Identity Module
SOAP
Simple Object Access Protocol
SW
SoftWare
TX
transmit
USB
Universal Serial Bus
UV
UltraViolet
WAN
Wide Area Network
Web service
A method of communication between two electronic devices over the World Wide Web.
Web-UI
Web User Interface
WEEE
Waste Electrical and Electronic Equipment Directive
XML
Extensible Mark-up Language

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INTRODUCTION
TABLE OF CONTENTS
1. SAFETY INFORMATION........................................................................................................................... 1
1.1. Responsibilities ................................................................................................................................... 1
1.2. Safety instructions............................................................................................................................... 1
1.2.1. Handling and mounting................................................................................................................ 1
1.2.2. Installation procedure................................................................................................................... 3
1.2.3. Maintenance................................................................................................................................. 7
2. AC550/AC750 OVERVIEW........................................................................................................................ 8
3. AC550/AC750 INTRODUCTION ............................................................................................................... 9
3.1. Standards and references................................................................................................................... 9
3.2. Type designation............................................................................................................................... 11
3.3. Appearance....................................................................................................................................... 12
3.4. Main device properties...................................................................................................................... 13
3.5. Connection diagram.......................................................................................................................... 14
4. CONSTRUCTION..................................................................................................................................... 15
4.1. Technical figures and dimensions..................................................................................................... 15
4.2. Main parts of the device.................................................................................................................... 16
4.2.1. Device cover .............................................................................................................................. 17
4.2.2. Nameplate.................................................................................................................................. 18
4.2.3. Connectors and communication ports ....................................................................................... 19
4.2.3.1. Power supply...................................................................................................................... 19
4.2.3.2. RS-485................................................................................................................................ 20
4.2.3.3. Ethernet .............................................................................................................................. 21
4.2.3.4. USB port ............................................................................................................................. 21
4.2.4. Module areas for device modules.............................................................................................. 22
4.2.5. Battery compartment lid............................................................................................................. 23
4.2.6. LED indicators............................................................................................................................ 24
4.2.7. Reset button............................................................................................................................... 25
4.2.8. Device cover opening detector .................................................................................................. 25
4.3. Sealing .............................................................................................................................................. 26
5. DESCRIPTION OF MAIN DEVICE FUNCTIONALITIES AND FEATURES ........................................... 27
5.1. Web user interface............................................................................................................................ 27
5.1.1. Web user interface structure...................................................................................................... 28
5.1.2. Dashboard.................................................................................................................................. 29
5.2. Attached devices............................................................................................................................... 31
5.3. Alarm and Events.............................................................................................................................. 33
5.3.1. Events........................................................................................................................................ 33
5.3.2. Alarms........................................................................................................................................ 36
5.4. WAN interface................................................................................................................................... 38
5.4.1. Modem....................................................................................................................................... 38
5.4.1.1. Signal level ......................................................................................................................... 39
5.4.2. Ethernet...................................................................................................................................... 40
5.5. NAN interface.................................................................................................................................... 41
5.5.1. PLC............................................................................................................................................ 41
5.5.1.1. Attached devices ................................................................................................................ 41
5.5.1.2. PLC parameters.................................................................................................................. 41
5.5.1.3. PLC Alarms & Events......................................................................................................... 42

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5.5.1.4. Advanced PLC parameters ................................................................................................ 42
5.5.2. Serial RS-485............................................................................................................................. 43
5.6. LAN interface..................................................................................................................................... 44
5.6.1. Local Ethernet............................................................................................................................ 44
5.7. System .............................................................................................................................................. 44
5.7.1. System settings.......................................................................................................................... 44
5.7.1.1. Host name .......................................................................................................................... 45
5.7.1.2. Device Time........................................................................................................................ 45
5.7.1.2.1. Time synchronization..................................................................................................... 46
5.7.2. Advanced settings...................................................................................................................... 47
5.7.2.1. Import settings .................................................................................................................... 47
5.7.2.2. Export settings.................................................................................................................... 48
5.7.3. User Management ..................................................................................................................... 49
5.7.4. Firmware upgrade...................................................................................................................... 50
5.7.5. System reboot............................................................................................................................ 51
5.7.6. System information .................................................................................................................... 52
5.8. HES interface.................................................................................................................................... 53
5.8.1. Web services for device management....................................................................................... 53
5.8.2. Meter data readings................................................................................................................... 53
5.9. White list............................................................................................................................................ 54
5.10. Push on power down (Last gasp).................................................................................................. 55
5.11. Security.......................................................................................................................................... 56
5.11.1. Physical security..................................................................................................................... 56
5.11.1.1. Sealing protection............................................................................................................... 56
5.11.1.2. Tamper detectors................................................................................................................ 56
5.11.2. Logical security....................................................................................................................... 56
5.12. Backup features............................................................................................................................. 57
5.12.1. RTC backup............................................................................................................................ 57
5.12.2. Backup power supply ............................................................................................................. 57
6. INSTALLATION PROCEDURE............................................................................................................... 58
6.1. Installation site preparation ............................................................................................................... 58
6.1.1. Installation site in CAT III environment...................................................................................... 58
6.1.2. Installation site in CAT IV environment...................................................................................... 58
6.2. Preparation of cables ........................................................................................................................ 59
6.2.1. Power (main) cables .................................................................................................................. 59
6.2.2. Cables for RS-485 ..................................................................................................................... 60
6.2.3. RJ45 port.................................................................................................................................... 60
6.3. Mounting and installation procedure................................................................................................. 61
6.3.1. Mounting a hanger..................................................................................................................... 62
6.3.2. Mounting the device on DIN rail................................................................................................. 63
6.3.3. Connecting the RS-485 terminals.............................................................................................. 65
6.3.4. Disassembling of a module........................................................................................................ 66
6.4. Exchanging battery............................................................................................................................ 67
7. NETWORK CONFIGURATION ............................................................................................................... 68
7.1. Connecting to the device................................................................................................................... 68
7.1.1. Local connection........................................................................................................................ 68
7.1.2. Remote connection.................................................................................................................... 69
8. DEINSTALLATION PROCEDURE.......................................................................................................... 70
9. TECHNICAL CHARACTERISTICS......................................................................................................... 71

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INTRODUCTION
INDEX OF FIGURES
Figure 1: AC550/AC750 in the AMI system.........................................................................................................................8
Figure 2: AC550/AC750 –front view.................................................................................................................................12
Figure 3: AC550/AC750 –back view ................................................................................................................................12
Figure 4: Connection diagram of AC550/AC750...............................................................................................................14
Figure 5: Overall dimensions of AC550/AC750 with device cover (in mm) .......................................................................15
Figure 6: Overall dimensions of AC550/AC750 without device cover (in mm) ..................................................................15
Figure 7: Fixing dimensions of AC550/AC750 (in mm)......................................................................................................15
Figure 8: Main parts of the device (except device cover)..................................................................................................16
Figure 9: Device cover ......................................................................................................................................................17
Figure 10: Inner side of device cover with device’s connection diagram and attached hanger .........................................17
Figure 11: Nameplate (example of AC750).......................................................................................................................18
Figure 12: Terminals and communication ports ................................................................................................................19
Figure 13: Power supply –female and male plug .............................................................................................................19
Figure 14: RS-485 communication port and switch for RS-485 line termination with a resistor of 120 ..........................20
Figure 15: Terminating-resistor switch –positions 1 (up) and 0 (down)............................................................................20
Figure 16: Ethernet communication ports –RJ45 (left: WAN2, right: LOCAL)..................................................................21
Figure 17: 8-pins RJ45 port with yellow and green LED diodes........................................................................................21
Figure 18: USB port, connector type A..............................................................................................................................21
Figure 19: Module areas with FEM1 sockets for connecting modules ..............................................................................22
Figure 20: Battery compartment covered with its lid..........................................................................................................23
Figure 21: LED indicators..................................................................................................................................................24
Figure 22: RESET button..................................................................................................................................................25
Figure 23: Positions of sealing points................................................................................................................................26
Figure 24: Web user interface –dashboard page.............................................................................................................28
Figure 25: Web user interface –header............................................................................................................................28
Figure 26: Dashboard page of the Web user interface......................................................................................................29
Figure 27: List of attached devices....................................................................................................................................31
Figure 28: Detailed information of selected attached device.............................................................................................32
Figure 29: Alarms & Events page......................................................................................................................................33
Figure 30: Alarms settings page........................................................................................................................................36
Figure 31: Modem (Wireless modem) parameters............................................................................................................38
Figure 32: Ethernet parameters ........................................................................................................................................40
Figure 33: PLC Parameters...............................................................................................................................................41
Figure 34: PLC communication log...................................................................................................................................42
Figure 35: RS-485 parameters..........................................................................................................................................43
Figure 36: Local Ethernet parameters...............................................................................................................................44
Figure 37: System settings page.......................................................................................................................................45
Figure 38: Advanced settings page...................................................................................................................................47
Figure 39: User management page...................................................................................................................................49
Figure 40: New user form..................................................................................................................................................49
Figure 41: Firmware upgrade page...................................................................................................................................50
Figure 42: System reboot..................................................................................................................................................51
Figure 43: System information ..........................................................................................................................................52
Figure 44: Device management interface architecture......................................................................................................53
Figure 45: White-list parameters in xml file (example) ......................................................................................................54
Figure 46: Power failure alarm in Settings of Alarms & Events.........................................................................................55
Figure 47: Power supply –inserting male plug in female socket.......................................................................................59
Figure 48: Ethernet port –RJ45 female socket.................................................................................................................60
Figure 49: RJ45 connector................................................................................................................................................60
Figure 50: Unlocking device-cover locking cap (left: locked; right: unlocked)....................................................................61
Figure 51: Mounting the device’s hanger ..........................................................................................................................62
Figure 52: Removing the hanger.......................................................................................................................................62
Figure 53: DIN rail and the device.....................................................................................................................................63

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INTRODUCTION
Figure 54: Unlock the mechanism.....................................................................................................................................63
Figure 55: Hanging the device on the DIN rail (back view) ...............................................................................................63
Figure 56: Hanged device on the DIN rail (back view) ......................................................................................................64
Figure 57: Locking the mechanism ...................................................................................................................................64
Figure 58: Opening RS-485 terminal.................................................................................................................................65
Figure 59: Inserting the cable in opened RS-485 terminal................................................................................................65
Figure 60: Removing top module......................................................................................................................................66
Figure 61: Removing bottom module................................................................................................................................66
Figure 62: Correctly oriented battery.................................................................................................................................67
Figure 63: Login dialog box...............................................................................................................................................68
INDEX OF TABLES
Table 1: Description of the AC550/AC750 type designation..............................................................................................11
Table 2: Terminal data of power supply terminals.............................................................................................................19
Table 3: Terminal data of RS-485 interface.......................................................................................................................20
Table 4: RS-485 switch position........................................................................................................................................20
Table 5: Characteristics of module areas..........................................................................................................................22
Table 6: Meaning of LED indicators..................................................................................................................................24
Table 7: Event-log types....................................................................................................................................................33
Table 8: List of events.......................................................................................................................................................35
Table 9: Built-in users........................................................................................................................................................49
Table 10: White-list parameters ........................................................................................................................................54
Table 11: Fuse requirements for CAT III environment ......................................................................................................58
Table 12: Fuse requirements for CAT IV environment......................................................................................................58
Table 13: Pin designation of RJ45 port .............................................................................................................................60

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1. SAFETY INFORMATION
1. SAFETY INFORMATION
Safety information used in this document is described with the following symbols and pictograms:
DANGER: for a possibly dangerous situation, which could result in severe physical injury
or fatality –attention to high-risk hazards
WARNING: attention to medium risk hazards
CAUTION: for a possibly dangerous situation, which could result in minor physical injury
or material damage - attention to low-risk hazards
Operating instruction: for general details and other useful information
All safety information in this document describes the type and source of danger, its possible consequences,
and measures to avoid danger.
1.1. Responsibilities
The owner of the device is responsible for assuring that all authorized persons who work with it, read, and
understand the parts of this document that explain safe handling with the device.
The personnel must be sufficiently qualified for the work that will be performed. The installation personnel
must possess the required electro technical knowledge and skills, and must be authorized by the utility to
perform the installation procedure.
The personnel must strictly follow safety regulations and operating instructions, written in the individual chap-
ters in this document.
The owner of the device responds specially for the protection of the persons, for prevention of material dam-
age and for training of personnel.
1.2. Safety instructions
1.2.1. Handling and mounting
At the beginning of installation at the metering/data-gathering point, the device should be carefully taken out
of the box in which it is packed. This should prevent the device from falling as well as any other external or
internal damage to it and personal injuries. Should such an incident occurs despite all precautions, the de-
vice should not be installed at metering/communication point as such damage may result in different haz-
ards. In such a case, the device needs to be sent back to the manufacturer for examination and testing.
CAUTION
The edges of the seals, sealing wires and edges under (removed) device cover are sharp!

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1. SAFETY INFORMATION
CAUTION
The temperature of the terminal block of the connected and operating device may rise; therefore, the temper-
ature of the device cover may rise as well.
DANGER
In a case of any damage inside the device (fire, explosion...), do not open it.
CAUTION
The device may be used only for the purpose of data gathering and communication, for which it was
produced. Any misuse of the device will lead to potential hazards.
WARNING
Safety measures should be observed at all times. Do not break the seals or open the device at any time!
It must be consulted in all cases where symbol is marked in order to find out the nature of the po-
tential hazards and any actions, which have to be taken to avoid them.
The device installation procedure is described in this document. For safety reasons, the following instructions
should be followed.
See the complete document for detailed technical features of the device and its intended use.
Only a properly connected device can perform correctly!

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1. SAFETY INFORMATION
1.2.2. Installation procedure
DANGER
The device is connected to electrical network. Any unauthorized manipulation of the device is life
hazardous and prohibited according to the applicable legislation. Any attempt to damage the seals
as well as any unauthorized opening of the device cover is strictly forbidden.
Installation companies shall implement a training policy that ensures that all installers are adequately trained,
understand risk and safety issues, and possess the relevant skills before they commence operational duties.
The installer will need to recognise and understand different installations, meter types and various equipment
associated with those installations applicable to the successful installation of the device.
CAUTION
On the supply side of the installation site, the installer must provide environment according to requirements
for OVC III or lower, so proper overvoltage protection must be installed (max. overvoltage < 4 kV). The pro-
tection must be done according to local regulation.
The installer must provide overcurrent protection on the supply side of installation. The cut-off current of pro-
tection must not be higher than the maximal current (Imax) of the device. The current capability of overcurrent
protection must be according to UC rating of the device equipment. The overcurrent protection must be done
according to local regulation as well.
The installer is responsible for coordinating the rating and the characteristics of the supply side overcurrent
protection devices.
The installer must consult and comply with local regulations and read the installation instructions
written in this document before installation.
This document provides the instructions for installing the device.
The document provides a short overview of the device, details of its installation and set-up, installation con-
siderations, and health and safety considerations.
The installer will be considered as a public face by both the device owner and its customers. The installer
shall adopt the highest standards of behaviour and be respectful to clients and members of the public.
Before the beginning of the installation procedure, it should be checked if the installation point is correctly
prepared for device installation. The installation point must always be left clean and in order.
The work location shall be defined and clearly marked. Adequate working space as well as means of access
and lighting shall be provided at all parts of an electrical installation on, with, or near which any work activity
is to be carried out.
Where it is necessary, safe access to the work location shall be clearly marked.
The installation point must not be exposed to running water or fire.
Device installation must not be performed by unauthorised and untrained personnel. Such persons are not
allowed to cut the seals and open the device cover because of electric shock possibility.
DANGER
Opening the terminal, module or device cover is life hazardous due to possibility of electric shock.
Installation personnel must possess the required electro technical knowledge and skills, and must be author-
ised by the device owner to perform the installation procedure.
The installer is obligated to perform the installation procedure in accordance with the national legislation and
internal norms of the device owner.

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1. SAFETY INFORMATION
National legislation can set out the minimum age and the competence criteria for installers. In a case, where
no national requirements are defined, the following criteria shall be used by assessing the competence of
installers: electro technical knowledge, experiences with electrical work, understanding of the installation pro-
cedures, practical experience of that work, understanding the hazards which can arise during the work and
the precautions to be observed, and the ability to distinguish whether is safe to continue working.
According to the basic principles, either the nominated person in control of the electrical installation or the
nominated person in control of the work activity shall ensure that specific and detailed instructions are given
to the personnel carrying out the work before starting and when completion of the work.
Before starting work, the nominated person in control of the work activity shall give notification to the nomi-
nated person in control of the electrical installation, of the nature, place, and consequences to the electrical
installation of the intended work.
CAUTION
It is expected that the installer fully understands the risks and safety issues involved in electrical in-
stallations. The installer shall be aware at all times of the potential hazard of electrical shock.
Tools, equipment, and devices shall comply with the requirements of relevant national or international stand-
ards where these exist. Tools, equipment, and devices shall be used in accordance with the instructions and/or
guidance provided by the manufacturer or supplier.
Any tools, equipment, and devices provided for the purpose of safe operation with, or work on, with, or near
electrical installations shall be suitable for that use, be maintained, and properly used.
Personnel shall be equipped with clothing suitable for the workplace and its conditions. This could include the
use of close-fitting clothing or additional PPE (personal protective equipment).
CAUTION
The installer must be properly equipped with personal protection equipment (PPE) and use the appropriate
tools at all times during the installation.
Working procedures are divided into three different types: dead working, live working, and working in the vi-
cinity of live parts. All these procedures are based on the use of safety measures against electric shock
and/or the effects of short-circuits and arcing.
The installer must be informed whether the national legislation permits the work on the installation under volt-
age –live work, and must follow the rules of legislation.
Depending on the kind of work, the personnel working in such conditions shall be instructed or skilled. Live
working requires the use of specific procedures. Instructions shall be given on how to maintain tools, equip-
ment, and devices in good working order and how to verify them before working.
This subclause deals with the essential requirements (“the five safety or golden rules”) for ensuring that the
electrical installation at the work location is disconnected from mains secure for the duration of the work.
This shall require clear identification of the work location. After the respective electrical installations have
been identified, the following five essential requirements shall be undertaken in the specified order unless
there are essential reasons for doing otherwise: disconnect completely (1.), secure against re-connection
(2.), verify that the installation is dead (3.), carry out earthing and short-circuiting (4.), and provide protection
against adjacent live parts (5.).

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1. SAFETY INFORMATION
CAUTION
Do not attempt to install the device before you have isolated the installation site from the network!
DANGER
The main fuses must be removed before making any modifications to the installation, and kept safe
until completing the work to prevent the unnoticed reinsertion.
DANGER
Connecting the device to the electrical network under voltage is life hazardous. The device connec-
tion procedure may only be performed by trained and adequately authorized personnel.
CAUTION
Only one wire (solid wire or wire/wires equipped with ferrule) may be connected in one terminal. Otherwise,
the terminal could be damaged or the contact could not be made properly.
CAUTION
Use only wires according to requirements in the manual.
DANGER
The isolation of the connecting cables must extend over the completely visible part of the cables.
There must be no further bare part of the cable visible above the terminal edge. Touching live parts is
life hazardous. The stripped part of the connecting wire should be shortened if necessary.
CAUTION
At the end of installation at the installation point, no cables should stay unconnected or hanging
freely from the installation point. Device cover must be closed and sealed.
The device has to be mounted on a smooth vertical surface and fixed on 3 points with screws using the pre-
scribed torque (the device has two attachment holes and, optionally, a top hanger).
The device is intended for mounting at an indoor installation point, in a device cabinet, secured against the
undesired access of unauthorized persons. Do not expose device surface to very high temperatures even
though the surface is made of non-flammable plastics to prevent fire.
Electrical connection: mounting cables must be properly dimensioned and of proper shape. They must be
mounted using the prescribed torque. The device should be connected according to the device connection
diagram that is attached to the inner side of the device cover.

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1. SAFETY INFORMATION
CAUTION
If it is possible to install the device without isolation from the electricity network, i.e. on live network, then ap-
propriate instructions and safety warnings shall be provided.
DANGER
The preliminary fuses and/or voltage arresters must be re-inserted before commissioning and func-
tional check of the device.
Seals on the device have to be checked at the end of the installation procedure so that the consumer
(final customer) cannot come into unintentional contact with live parts of the device.
DANGER
If the device cover is not mounted tight, there exists a danger of contact with the connection termi-
nals. Contact with live parts of the device is life hazardous.
CAUTION
For safety reasons, place the device cover immediately after the installation procedure and fix it with seal-
able locking cap!
DANGER
Switch on the power. Beware of the risk of electric shock at all times!
The functional check requires voltage to be applied.
If no main voltage is present, commissioning and functional check must be performed at a later date.

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1. SAFETY INFORMATION
1.2.3. Maintenance
The device-design, the built-in components, and the manufacturing procedures ensure high long-term stabil-
ity of product.
In the case service of the device is needed, the requirements from the device installation procedure must be
observed and followed.
Cleaning of the device is allowed only with a soft dry cloth. Cleaning is allowed only in front plate of the de-
vice. Cleaning is forbidden in the region of terminal block, where cables are connected to the device, and in
the region of the module. Cleaning can be performed only by the personnel responsible for device mainte-
nance.
CAUTION
Never clean soiled device under running water, or with high-pressure devices. Penetrating water can cause
short circuits. A damp cleaning cloth is sufficient to remove normal dirt such as dust. If the device is more heav-
ily soiled, it should be dismounted and sent to the responsible service or repair centre.
Visible signs of fraud attempt (mechanical damages, presence of a liquid, etc.) must be regularly checked.
The quality of seals and the state of the terminals and connecting cables must be regularly checked.
If there exists a suspicion of incorrect operation of the device, the local utility must be informed immediately.
DANGER
Breaking the seals and removing the device cover will lead to potential hazards because there are
live electrical parts inside.
After the end of the device’s lifetime, the device should be treated according to the Waste Electric and Elec-
tronic (WEEE) Directive!

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2. AC550/AC750 OVERVIEW
2. AC550/AC750 OVERVIEW
The AC550/AC750 is a family of communication devices based on a single platform. They provide connectiv-
ity between Head-End-System and smart electricity meters and designed with two exchangeable communi-
cation modules to cope with the rapid development of communication technologies.
Figure 1: AC550/AC750 in the AMI system

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3. AC550/AC750 INTRODUCTION
3. AC550/AC750 INTRODUCTION
3.1. Standards and references
EN 62368-1: 2014 +
+ AC:2015
Audio/video, information and communication technology equipment - Part 1: Safety require-
ments
EN 41003:2008
Particular safety requirements for equipment to be connected to telecommunication networks
and/or a cable distribution system
EN 50065-1
Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148.5 kHz.
General requirements, frequency bands and electromagnetic disturbances
EN 50065-2-3
Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148.5 kHz.
Immunity requirements for mains communications equipment and systems operating in the
range of frequencies 3 kHz to 95 kHz and intended for use by electricity suppliers and distrib-
utors
EN 55022
Information technology equipment - Radio disturbance characteristics - Limits and methods
of measurement
EN 55032
Electromagnetic compatibility of multimedia equipment - Emission Requirements
EN 55024
Information technology equipment - Immunity characteristics - Limits and methods of meas-
urement
EN 55011
Industrial, scientific and medical equipment. Radio-frequency disturbance characteristics.
Limits and methods of measurement
EN 301 489-1 V1.9.2
Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compati-
bility (EMC) standard for radio equipment and services; Part 1: Common technical require-
ments
EN 61000-3-2:2014
Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions
(equipment input current ≤ 16 A per phase)
EN 61000-3-3:2013
Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation of voltage changes, volt-
age fluctuations and flicker in public low-voltage supply systems, for equipment with rated
current <= 16 A per phase and not subject to conditional connection
IEC 61000-4-1
Electromagnetic compatibility (EMC) - Part 4-1: Testing and measurement techniques - Over-
view of IEC 61000-4 series
IEC 61000-4-2
Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques - Elec-
trostatic discharge immunity test
IEC 61000-4-3
Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radi-
ated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4
Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement techniques - Elec-
trical fast transient/burst immunity test
IEC 61000-4-5
Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement techniques -
Surge immunity test
IEC 61000-4-6
Electromagnetic compatibility (EMC) - Testing and measurement techniques - Immunity to
conducted disturbances, induced by radio-frequency fields
EN 61000-4-8
Electromagnetic Compatibility (EMC) - Part 4-8: Testing and Measurement Techniques -
Power Frequency Magnetic Field Immunity Test
IEC 61000-4-11
Testing and Measurement Techniques - Voltage Dips, Short Interruptions and Voltage Varia-
tions Immunity Tests
IEC 61000-4-12
Electromagnetic compatibility (EMC) - Part 4-12: Testing and measurement techniques -
Ring wave Immunity test
IEC 61180:2016
High-voltage test techniques for low-voltage equipment - Definitions, test and procedure re-
quirements, test equipment
IEC 60364 -1:2005
Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general
characteristics, definitions
EN 50470-1
Electricity metering equipment (a.c.) - Part 1: General requirements, tests and test conditions
Metering equipment (class indexes A, B and C)
IEC 62052-11:2003 +
A1:2016
Electricity metering equipment (AC) - General requirements, tests and test conditions - Part
11: Metering equipment
IEC 62052-31: 2015
Electricity metering equipment (AC) - General requirements, tests and test conditions - Part
31: Product safety requirements and tests
IEC 62054-21
Electricity metering (AC) - Tariff and load control - Part 21: Particular requirements for time
switches
EN 60068-2-1
Environmental testing. Tests. Test A. Cold
EN 60068-2-2
Environmental testing. Tests. Test B. Dry heat
EN 60068-2-6
Environmental testing. Tests. Test Fc. Vibration (sinusoidal)

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3. AC550/AC750 INTRODUCTION
EN 60068-2-14
Environmental testing. Tests. Test N. Change of temperature
EN 60068-2-27
Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock
EN 60068-2-30
Environmental testing. Tests. Test Db and guidance: Damp heat, cyclic (12 h + 12 h cycle)
EN 60068-2-75
Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests
EN 60085
Electrical insulation. Thermal evaluation and designation
IEC 60529
Degrees of protection provided by enclosures (IP Code)
IEC 62262: 2002
Degrees of protection provided by enclosures for electrical equipment against external me-
chanical impacts (IK code)
IEC 60998-2-1:2002
Connecting devices for low-voltage circuits for household and similar purposes - Part 2-1:
Particular requirements for connecting devices as separate entities with screw-type clamping
units
IEC 60695-2-11
Glow wire flammability test for end products
UL 94
Ed. 6: 2013/2016
Standard for safety: Tests for Flammability of Plastic Materials for Parts in Devices and Appli-
ances
EN 60715: 2002
Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails for
mechanical support of electrical devices in switchgear and controlgear installations
EN 61140
Protection against electric shock - Common aspects for installation and equipment
DLMS UA 1000-2
Ed. 8.0:2014
DLMS/COSEM Architecture and Protocols, the “Green Book” Ed. 8
DLMS UA 1000-1
Ed. 12.0:2014
COSEM Identification System and Interface Classes, the “Blue Book” Ed. 12
IEC 62056-1-0
Ed.1:2016
Electricity metering –Data exchange –The DLMS/COSEM suite –Part 1-0: Smart metering
standardisation framework
IEC 62056-46
Ed. 1.1:2007
Electricity metering –Data exchange for meter reading, tariff and load control –
Part 46: Data link layer using HDLC protocol
IEC 62056-5-3: 2016
Electricity metering –Data exchange –The DLMS/COSEM suite –Part 5-3: DLMS/COSEM
application layer
IEC 62056-6-1: 2015
Electricity metering –Data exchange - The DLMS/COSEM suite - Part 6-1: Object Identifica-
tion System (OBIS)
IEC 62056-6-2: 2016
Electricity metering –Data exchange –The DLMS/COSEM suite –Part 6-2: COSEM inter-
face classes
IEC 62056-9-7: 2013
Electricity metering –Data exchange –The DLMS/COSEM suite - Part 9-7: Communication
profile for TCP-UDP/IP networks
ITU-T G.9901
Narrowband orthogonal frequency division multiplexing power line communication transceiv-
ers - Power spectral density specification (04/2014)
ITU-T G.9903
Narrowband orthogonal frequency division multiplexing power line communication transceiv-
ers for G3-PLC networks (02/2014)
ITU-T G.9903
Narrowband orthogonal frequency division multiplexing power line communication transceiv-
ers for G3-PLC network - Amendment 1 (08/2015)
IEC 62056-4-7:2015
Electricity metering data exchange - The DLMS/COSEM suite - Part 4-7: DLMS/COSEM
transport layer for IP networks
CLC/TS 52056-8-5:
2015
Electricity metering data exchange. The DLMS/COSEM suite. Narrow-band OFDM G3-PLC
communication profile for neighbourhood networks
IEEE 802.15.4
IEEE Standard for Low-Rate Wireless Networks
RFC 3561
Ad Hoc On Demand Distance Vector (AODV) Parameters
RFC 6130
Mobile Ad Hoc Network (MANET) Neighbourhood Discovery Protocol (NHDP)
RFC 5444
Generalized Mobile Ad Hoc Network (MANET) Packet/Message Format
RFC 4944
Transmission of IPv6 Packets over IEEE 802.15.4 Networks
RFC 2460
Internet Protocol, Version 6 (IPv6) Specification
RFC 768
User Datagram Protocol
RFC 2463
Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Speci-
fication
RFC 4861
Neighbour Discovery for IP version 6 (IPv6)