Alstom MiCOM H35x User manual

MiCOM H35x
Technical Manual
Global Documentation
Version: 2
Publication Reference: H35x/EN GL/D23
© - ALSTOM 2013. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it
is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is
subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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CONTENTS
1. SAFETY AND HANDLING 5
1.1 Health and safety 5
1.2 Symbols 6
1.3 Installing, commissioning and servicing 6
1.4 De-commissioning and disposal 7
1.5 Technical specifications for safety 8
1.5.1 Protective fuse rating 8
1.5.2 Protective class 8
1.5.3 Installation category 8
1.5.4 Environment 8
1.6 Handling of Electronic Equipment 8
1.7 Packing and Unpacking 9
1.8 Guarantees 9
1.9 Copyrights & Trademarks 10
1.9.1 Copyrights 10
1.9.2 Trademarks 10
1.9.3 Warnings regarding use of Alstom Grid products 10
2. INTRODUCTION 11
2.1 MiCOM Switches Product Range 11
2.2 Naming of MiCOM Ethernet Switches 11
2.3 MiCOM H35x 11
3. FUNCTIONAL DESCRIPTION 12
3.1 MiCOM H35x Product Range 12
3.2 Fast redundant ring capability 12
3.2.1 Self-healing ring principle 12
3.2.2 MiCOM Hx5x Ethernet switch with self-healing ring facilities 13
3.2.3 ALSTOM'RID Ethernet ring redundancy 13
3.2.4 Performance 14
3.2.5 Benefits 15
3.3 MiCOM H35x functional composition 15
3.4 Power management 15
3.5 Ethernet Port Switching Features 15
3.5.1 10Base Tx and 100Base Tx 15
3.5.2 100Base Fx 16

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3.6 Ethernet Management 16
3.6.1 Address lookup 16
3.6.2 Auto-negotiation and speed-sensing 16
3.6.3 Forwarding 16
3.6.4 Priority tagging 16
3.6.5 SNMP v2 16
4. TECHNICAL DATA 18
4.1 MiCOM H35x Range 18
4.2 CONFORMITY 18
4.3 Ethernet Port Characteristics 18
4.3.1 10/100BaseTx Port 18
4.3.2 100BaseFx Multimode Port (H352) 18
4.3.3 100BaseFx Single Mode Port (H354) 18
4.3.4 100BaseFx Multimode Port (H356, H358) 19
4.3.5 100BaseFx Single Mode Port (H358 ring connector) 19
4.4 General Characteristics 19
4.4.1 Mechanical 19
4.4.2 Auxiliary Power Supply 19
4.4.3 Auxiliary Fault Relay 19
4.4.4 Ethernet Management 20
4.5 Environmental Characteristics 20
4.5.1 Electrical 20
4.5.2 Isolation 20
4.5.3 Climatic 21
4.5.4 Electromagnetic Compatibility 21
4.5.5 Mechanical 22
5. HUMAN MACHINE INTERFACE (HMI) 23
5.1 H352-V2 HMI 23
5.2 H356/H358 HMI 23
5.3 H35x LEDs 24
6. INSTALLATION 25
7. CONNECTION 26
7.1 Connection of the protective conductor (earth) 26
7.2 Cable fitting 26
7.3 Power supply wiring 27
7.4 Fail-safe contacts 28

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7.5 Ethernet Connection 29
7.5.1 Ethernet cable type 29
7.5.2 Ethernet optical fiber 29
8. SETTINGS 31
8.1 Dip switch description 31
8.2 Address of the repeater 31
8.2.1 Configuring the address 31
8.2.2 Example: defining address “10” 31
8.3 IP Address of the repeater 32
8.4 Power supply alarm 32
8.5 Label 32
9. MAINTENANCE 33
9.1 Scope 33
9.2 Recommendation before maintenance operations 33
9.3 Maintenance period 33
9.4 Diagnosis facilities 34
9.5 Method of repair 34
9.5.1 Replacing the MiCOM H3xx 34
10. APPLICATIONS 35
10.1 Fiber Optic budget calculations 35
10.1.1 Example 1: between repeaters 36
10.1.2 Example 2: between repeaters with patch panel 36
11. GLOSSARY 37

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FIGURES
FIGURE 1: SELF-HEALING RING MECHANISM 12
FIGURE 2: INTERNAL ARCHITECTURE OF MiCOM HX5X 13
FIGURE 3: NOMINAL REDUNDANT ETHERNET RING ARCHITECTURE WITH
MiCOM HX5X SWITCHES 14
FIGURE 4: ETHERNET RING ARCHITECTURE WITH MiCOM HX5X SWITCHES AFTER
FAILURE 14
FIGURE 5: MiCOM H352 15
FIGURE 6: H35X MIB STRUCTURE 16
FIGURE 7: 10/100BASETX PORT 18
FIGURE 8: 100BASEFX MULTIMODE PORT (H352) 18
FIGURE 9: 100BASEFX SINGLE MODE PORT (H354) 18
FIGURE 10: 100BASEFX MULTIMODE PORT (H356, H358) 19
FIGURE 11: 100BASEFX SINGLE MODE PORT (H358 RING CONNECTOR) 19
FIGURE 12: H352-V2 HMI 23
FIGURE 13: H356/H358 HMI 23
FIGURE 14: EARTHING CABLE EXAMPLE 26
FIGURE 15: POWER SUPPLY WIRING 27
FIGURE 16: FAIL-SAFE CONTACTS WIRING 28
FIGURE 17: RJ45 CONNECTOR 29
FIGURE 18: ETHERNET OPTICAL FIBER – ST 29
FIGURE 19: ETHERNET OPTICAL FIBER – SC 30
FIGURE 20: DIP SWITCHES 31
FIGURE 21: DIP SWITCHES EXAMPLE 32
FIGURE 22: IP ADDRESS 32
FIGURE 23: MiCOM H35X LABEL 32
FIGURE 24: POWER SUPPLY CONNECTOR 33
FIGURE 25: FIBER BUDGET 35
FIGURE 26: FIBER BUDGET EXAMPLE 35

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1. SAFETY AND HANDLING
This Safety Section and the relevant equipment documentation provide full information on
safe handling, commissioning and testing of this equipment.
The technical data in this Safety Section is typical only, see the technical data section of the
relevant equipment documentation for data specific to a particular piece of equipment.
Before carrying out any work on the equipment the user should be familiar with
the contents of this Safety Section and the ratings on the equipment’s rating
label.
Reference should be made to the external connection diagram before the equipment is
installed, commissioned or serviced.
1.1 Health and safety
The information in the Safety Section of the equipment documentation is intended to ensure
that the equipment is properly installed and handled in order to maintain it in a safe
condition.
It is assumed that everyone who will be associated with the equipment will be familiar with
the contents of this Safety Section.
When electrical equipment is in operation, dangerous voltages will be present in certain parts
of the equipment. Failure to observe warning notices, incorrect use, or improper use may
endanger personnel and equipment and also cause personal injury or physical damage.
Before working on the equipment it must first be electrically isolated.
Proper and safe operation of the equipment depends on appropriate shipping and handling,
proper storage, installation and commissioning, and on careful operation, maintenance and
servicing. For this reason only qualified personnel may work on or operate the equipment.
Qualified personnel are individuals who:
• Are familiar with the installation, commissioning, and operation of the equipment and
of the system to which it is being connected;
• Are trained in the care and use of safety apparatus in accordance with safety
engineering practices;
• Are trained in emergency procedures (first aid).
The equipment documentation gives instructions for its installation, commissioning, and
operation. However, the manuals cannot cover all conceivable circumstances or include
detailed information on all topics. In the event of questions or specific problems, do not take
any action without proper authorization. Contact the appropriate Alstom*ULGtechnical sales
office and request the necessary information.

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1.2 Symbols
For safety reasons the following symbols which may be used on the equipment or referred to
in the equipment documentation, should be understood before it is installed or
commissioned.
Caution: refer to equipment documentation Caution: risk of electric shock
Protective Conductor (*Earth) terminal Functional/Protective Conductor
(*Earth) terminal
Note: This symbol may also be used
for a Protective Conductor
(Earth) terminal if that terminal
is part of a terminal block or
sub-assembly e.g. power
supply.
*NOTE: THE TERM EARTH USED THROUGHOUT THIS TECHNICAL
MANUAL IS THE DIRECT EQUIVALENT OF THE NORTH
AMERICAN TERM GROUND.
1.3 Installing, commissioning and servicing
Equipment connections
Personnel undertaking installation, commissioning or servicing work for this
equipment should be aware of the correct working procedures to ensure safety.
The equipment documentation should be consulted before installing,
commissioning, or servicing the equipment.
Terminals exposed during installation, commissioning and maintenance may
present a hazardous voltage unless the equipment is electrically isolated.
Any disassembly of the equipment may expose parts at hazardous voltage, also
electronic parts may be damaged if suitable electrostatic voltage discharge (ESD)
precautions are not taken.
If there is unlocked access to the rear of the equipment, care should be taken by
all personnel to avoid electric shock or energy hazards.
The equipment must be connected in accordance with the appropriate connection
diagram.
Protection Class I Equipment
- Before energizing the equipment it must be earthed using the protective
conductor terminal, if provided, or the appropriate termination of the
supply plug in the case of plug connected equipment.
- The protective conductor (earth) connection must not be removed since
the protection against electric shock provided by the equipment would be
lost.
- When the protective (earth) conductor terminal (PCT) is also used to
terminate cable screens, etc., it is essential that the integrity of the
protective (earth) conductor is checked after the addition or removal of
such functional earth connections. For M4 stud PCTs the integrity of the
protective (earth) connections should be ensured by use of a locknut or
similar.

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The recommended minimum protective conductor (earth) wire size is 2.5 mm²
(3.3 mm² for North America) unless otherwise stated in the technical data section
of the equipment documentation, or otherwise required by local or country wiring
regulations.
The protective conductor (earth) connection must be low-inductance and as short
as possible.
Before energizing the equipment, the following should be checked:
- Voltage rating/polarity (rating label/equipment documentation);
- Protective fuse rating;
- Integrity of the protective conductor (earth) connection (where
applicable);
- Voltage rating of external wiring, applicable to the application.
Equipment use
If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
Equipment operating conditions
The equipment should be operated within the specified electrical and
environmental limits.
Insulation and dielectric strength testing
Insulation testing may leave capacitors charged up to a hazardous voltage. At
the end of each part of the test, the voltage should be gradually reduced to zero,
to discharge capacitors, before the test leads are disconnected.
Insertion of modules and PCB cards
Modules and PCB cards must not be inserted into or withdrawn from the
equipment whilst it is energized, since this may result in damage.
Fiber optic communication
Where fiber optic communication devices are fitted, these should not be viewed
directly. Optical power meters should be used to determine the operation or
signal level of the device.
Cleaning
The equipment may be cleaned using a lint-free cloth dampened with clean water,
when no connections are energized. Contact fingers of test plugs are normally
protected by petroleum jelly, which should not be removed.
1.4 De-commissioning and disposal
De-commissioning
The supply input (auxiliary) for the equipment may include capacitors across the
supply or to earth. To avoid electric shock or energy hazards, after completely
isolating the supplies to the equipment (both poles of any dc supply), the
capacitors should be safely discharged via the external terminals prior to de-
commissioning.
Disposal
It is recommended that incineration and disposal to water courses is avoided.
The equipment should be disposed of in a safe manner. Any equipment
containing batteries should have them removed before disposal, taking
precautions to avoid short circuits. Particular regulations within the country of
operation, may apply to the disposal of the equipment.

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1.5 Technical specifications for safety
Unless otherwise stated in the equipment technical manual, the following data is applicable.
1.5.1 Protective fuse rating
The recommended maximum rating of the external protective fuse for equipments is 16A,
high rupture capacity (HRC) Red Spot type NIT, or TIA, or equivalent. The protective fuse
should be located as close to the unit as possible.
1.5.2 Protective class
IEC 60255-27: 2005 Class I (unless otherwise specified in the
EN 60255-27: 2005 equipment documentation). This equipment
requires a protective conductor (earth) connection
to ensure user safety.
1.5.3 Installation category
IEC 60255-27: 2005 Installation category III (Overvoltage Category III):
EN 60255-27: 2005 Distribution level, fixed installation.
Equipment in this category is qualification tested at
5 kV peak, 1.2/50 µs, 500 Ω, 0.5 J, between all
supply circuits and earth and also between
independent circuits.
1.5.4 Environment
The equipment is intended for indoor installation and use only. If it is required for use in an
outdoor environment then it must be mounted in a specific cabinet or housing allowing it to
meet the requirements of IEC 60529 with the classification of degree of protection IP54 (dust
and splashing water protected).
Pollution Degree - Pollution Degree 2 Compliance is demonstrated by reference to safety
Altitude - Operation up to 2000m standards.
IEC 60255-27:2005
EN 60255-27: 2005
1.6 Handling of Electronic Equipment
A person’s normal movements can easily generate electrostatic potentials of several
thousand volts.
Discharge of these voltages into semiconductor devices when handling circuits can cause
serious damage, which often may not be immediately apparent but the reliability of the circuit
will have been reduced.
The electronic circuits of Aipqlj products are immune to the relevant levels of
electrostatic discharge when housed in their cases. Do not expose them to the risk of
damage by withdrawing modules unnecessarily.
Each module incorporates the highest practical protection for its semiconductor devices.
However, if it becomes necessary to withdraw a module, the following precautions should be
taken in order to preserve the high reliability and long life for which the equipment has been
designed and manufactured.
1. Before removing a module, ensure that you are at the same electrostatic potential as
the equipment by touching the case.
2. Handle the module by its front-plate, frame, or edges of the printed circuit board. Avoid
touching the electronic components, printed circuit track or connectors.
3. Do not pass the module to any person without first ensuring that you are both at the
same electrostatic potential. Shaking hands achieves equipotential.
4. Place the module on an antistatic surface, or on a conducting surface that is at the
same potential as you.
5. Store or transport the module in a conductive bag.

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More information on safe working procedures for all electronic equipment can be found in
IEC 60147-0F and BS5783.
If you are making measurements on the internal electronic circuitry of any equipment in
service, it is preferable that you are earthed to the case with a conductive wrist strap.
Wrist straps should have a resistance to ground between 500k – 10M Ohms. If a wrist strap
is not available you should maintain regular contact with the case to prevent the build up of
static. Instruments used for making measurements should be earthed to the case whenever
possible.
ALSTOM'RID System strongly recommends that detailed investigations on the electronic
circuitry, or modification work, should be carried out in a Special Handling Area such as
described in IEC 60147-0F or BS5783.
1.7 Packing and Unpacking
All MiCOM Hxxx devices are packaged separately in their own cartons and shipped inside
outer packaging. Use special care when opening the cartons and unpacking the device, and
do not use force. In addition, make sure to remove from the inside carton the supporting
documents supplied with each individual device and the type identification label.
The design revision level of each module included with the device in its as-delivered
condition can be determined from the list of components. This list should be carefully saved.
After unpacking the device, inspect it visually to make sure it is in proper mechanical
condition.
If the MiCOM Hxxx device needs to be shipped, both inner and outer packaging must be
used. If the original packaging is no longer available, make sure that packaging conforms to
ISO 2248 specifications for a drop height ≤0.8m.
1.8 Guarantees
The media on which you received ALSTOM'RIDsoftware is guaranteed not to fail executing
programming instructions, due to defects in materials and workmanship, for a period of 90
days from date of shipment, as evidenced by receipts or other documentation. ALSTOM'RID
will, at its option, repair or replace software media that do not execute programming
instructions if ALSTOM'RID receive notice of such defects during the warranty period.
ALSTOM'RID does not guarantee that the operation of the software shall be uninterrupted or
error free.
A Return Material Authorization (RMA) number must be obtained from the factory and clearly
marked on the package before any equipment acceptance for guarantee work. ALSTOM'RID
will pay the shipping costs of returning to the owner any parts that are covered by warranty.
ALSTOM'RID believe that the information in this document is accurate. The document has
been carefully reviewed for technical accuracy. In the event that technical or typographical
errors exist, ALSTOM'RID reserves the right to make changes to subsequent editions of this
document without prior notice to holders of this edition. The reader should consult
ALSTOM'RID if errors are suspected. In no event shall ALSTOM'RID be liable for any
damages arising from or related to this document or the information contained in it.
Except as specified herein, ALSTOM'RID makes no guarantees, express or implied and
specifically disclaims any guarantee of merchantability or suitability for a particular purpose.
Customer's rights to recover damages caused by fault or negligence on the part
ALSTOM'RID shall therefore be limited to the amount paid by the customer. ALSTOM'RID will
not be liable for damages resulting from loss of data, profits, use of products or incidental or
consequential damages even if advised of the possibility thereof. This limitation of the liability
of ALSTOM'RID will apply regardless of the form of action, whether in contract or tort,
including negligence. Any action against ALSTOM'RID must be brought within one year after
the cause of action accrues. ALSTOM'RID shall not be liable for any delay in performance
due to causes beyond its reasonable control. The warranty provided herein does not cover
damages, defects, malfunctions, or service failures caused by owner's failure to follow
ALSTOM'RID installation, operation, or maintenance instructions, owner's modification of the
product; owner's abuse, misuse, or negligent acts; and power failure or surges, fire, flood,
accident, actions of third parties, or other events outside reasonable control.

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1.9 Copyrights & Trademarks
1.9.1 Copyrights
Under the copyright laws, this publication may not be reproduced or transmitted in any form,
electronic or mechanical, including photocopying, recording, storing in an information
retrieval system, or translating, in whole or in part, without the prior written consent of
ALSTOM'RID.
1.9.2 Trademarks
PACiS, PACiS SCE, PACiS ES, PACiS OI, PACiS SMT, ALSTOM'RID, pacis.biz and
pacis.com - are trademarks of ALSTOM'RID. Product and company names mentioned herein
are trademarks or trade names of their respective companies.
1.9.3 Warnings regarding use of ALSTOM'RID products
ALSTOM'RID products are not designed with components and testing for a level of reliability
suitable for use in connection with surgical implants or as critical components in any life
support systems whose failure to perform can reasonably be expected to cause significant
injuries to a human.
In any application, including the above reliability of operation of the software products can be
impaired by adverse factors, including - but not limited to - fluctuations in electrical power
supply, computer hardware malfunctions, computer operating system malfunctions, software
suitability, suitability of compilers and development software used to develop an application,
installation errors, software and hardware compatibility problems, malfunctions or failures of
electronic monitoring or control devices, transient failures of electronic systems (hardware
and/or software), unanticipated uses or misuses, or errors by the user or application
designer (adverse factors such as these are collectively termed "System failures").
Any application where a system failure would create a risk of harm to property or persons
(including the risk of bodily injuries and death) should not be reliant solely upon one form of
electronic system due to the risk of system failure to avoid damage, injury or death, the user
or application designer must take reasonable steps to protect against system failure,
including - but not limited - to back-up or shut-down mechanisms, not because the end-
user's system is customized and differs from ALSTOM'RID testing platforms but also because
a user or application designer may use ALSTOM'RID products in combination with other
products. These actions cannot be evaluated or contemplated by ALSTOM'RID. Thus, the
user or application designer is ultimately responsible for verifying and validating the
suitability of ALSTOM'RID products whenever they are incorporated in a system or
application, even without limitation of the appropriate design, process and safety levels of
such system or application.

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2. INTRODUCTION
The MiCOM Ethernet range is designed to deal with the needs of a wide range of electric
plants. Emphasis has been placed on strong compliance with standards, scalability,
modularity and open architecture.
Theses features facilitate the use of MiCOM products in several applications, from the most
basic to the most demanding. They also ensure interoperability with existing components.
ALSTOM'RIDgs philosophy is to provide a range of Ethernet products such as switches, taking
into account the compulsory requirements of electrical substations, including power supply
and immunity to environmental constraints.
It also provides solutions to specific requirements such as network redundancy
management.
Each of these products can be used independently, or can be integrated to form a PACiS
system, which is a Digital Control System (DCS).
2.1 MiCOM Switches Product Range
Driven by calls from all over the world for advanced substation applications for Automation
control and monitoring, ALSTOM'RID is committed to provide a comprehensive range of
Ethernet-based products that respond to our customers' needs.
Standard Ethernet products rarely meet the constraints of electrical plants: environmental,
power supply, redundancy, etc.
The new MiCOM Hxxx series has been specifically tailored to respond to all of these
requirements, and is compatible with the PACiS system. The MiCOM Hxxx range is
designed to address different kinds of architectures and installations.
The MiCOM H series is split into three major ranges:
• MiCOM Hx4x Ethernet Switches designed for Simple Ethernet Star architecture
• MiCOM Hx5x Ethernet Switches designed for Redundant Optical Ring architecture
with fast Self-Healing technology
• MiCOM Hx6x Ethernet Switches designed for Dual Ethernet Star architecture with
Dual Homing technology
2.2 Naming of MiCOM Ethernet Switches
The Ethernet devices naming convention depends on its mechanical features and the
number of copper or optical ports.
The existing devices are:
• MiCOM H1xx PCI Board (the power supply is from the PCI BUS)
• MiCOM H3xx DIN mounting case and Redundant power supply
• MiCOM H6xx 19’’ Rack with up to 4 switches and Redundant power supply
2.3 MiCOM H35x
The MiCOM H35x range is a set of standalone switches, embedded with the Self Healing
Mechanism to provide redundancy.
The MiCOM H35x range relies on managed switches that are easy to install and operate,
designed to be implemented in an electrical plant environment (IEC 61000-4 & 60255-5).
On the media side, MiCOM H35x supports 10BaseT, 100BaseTX and 100BaseFX as
specified by the IEEE 802.3 standard.
The MiCOM H35x is a plug-and-play device. It can run with the factory settings. However, to
adapt the switch to your application, you only need to configure the switch number using the
DIP switches. (see chapter 8: Settings).

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3. FUNCTIONAL DESCRIPTION
The MiCOM H35x is designed to be an Ethernet switch with a DIN RAIL mounting.
3.1 MiCOM H35x Product Range
The MiCOM H35x range is dedicated to ultra fast redundant Ethernet rings, and is defined by
the type of Ethernet connector. All the MiCOM H35x equipment range has at least two
copper connections via RJ45 connectors, with speed automatically adjusted by the external
emitters to 10 or 100 Mbps.
Ethernet copper links are limited in distance and subject to interference. The redundant
Ethernet ring is based on optical inter-switch connection. The user has the choice between
using Multimode Fiber optic for short distances, or Single mode Fiber Optic for long
distances.
The table below describes the MICOM H35x range, detailing the connectivity used.
Model Description Connectors
MiCOM H 352 Fast Ethernet industrial switch
Multimode 1310 nm
6 x RJ45
2 x ST (for Ring)
MiCOM H 354 Fast Ethernet industrial switch
Single mode 1310 nm
6 x RJ45
2 x SC
MiCOM H 356 Fast Ethernet industrial switch
Multimode 1310 nm
2 x LC (for Ring
Multimode)
4 x LC - Multimode
2 RJ45
MiCOM H 358 Fast Ethernet industrial switch
Single mode 1310 nm
2 x LC (for Ring
Single mode)
4 x LC - Multimode
2 RJ45
3.2 Fast redundant ring capability
3.2.1 Self-healing ring principle
Ethernet redundancy is usually managed by protocols that calculates another path to a
destination (by sending BPDUs) when the main link breaks. This could take from hundreds
of milliseconds to seconds. But the automation processes and applications require a network
reconfiguration of the order of 1 millisecond.
The ALSTOM'RID self-healing mechanism fulfils automation requirements by delivering a
very fast recovery time for the entire network (<1 ms).
S0204ENa
MiCOM H35
MiCOM H15
MiCOM H35
MiCOM H15
FIGURE 1: SELF-HEALING RING MECHANISM

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3.2.2 MiCOM Hx5x Ethernet switch with self-healing ring facilities
The MiCOM Hx5x is a standard IEEE802.3 Ethernet switch enhanced with the self-healing
manager (SHM). The diagram below shows the internal architecture of such a device.
Ethernet 100BaseFx
SWITCH
SHM
Self-healing ring
manager
PHY
Ethernet Ports 10/100 Base TX
PHY
To 2Optical Ring
Primary ring
Secondary ring
FLASH
Port MII
No.
Fail -safe
output relays
Ring RpEs Ring EpRs
S0205ENb
FIGURE 2: INTERNAL ARCHITECTURE OF MiCOM HX5X
3.2.3 ALSTOM'RID Ethernet ring redundancy
The SHM functions manage the ring. If the connection between two devices is broken the
network continues to run correctly.
Normally Ethernet packets travel on the primary fiber in the same direction, and only a
control frame (4 bytes) is sent every 5 µs on the secondary fiber in the opposite direction.
If the link is down, both SHMs immediately start the network self-healing. On one side of the
break, received messages are no longer sent to the primary fiber but are sent to the
secondary fiber. On the other side of the break, messages received on the secondary fiber
are sent to the primary fiber and the new topological loop is closed in less than 1 ms.
It is therefore possible to extend the number of devices, or the size of a substation without
stopping the network. The loop is opened and new equipment is connected (which closes
the loop).
To increase reliability, some specific mechanisms are used:
• The quality of transmission is monitored. Each frame (Ethernet packet or control
frame) is controlled by the SHM. If a high error rate is detected, self-healing starts and
the fault is eliminated.
• Even if there is no traffic on the primary link, the secondary link is still supervised by
sending out control frames every 5 µs.
Initially, the network architecture is as shown on figure 3.

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S0206ENa
EP
RS
RP
ES
Primary fiber
Secondary fiber
A B CDE
1 2 35 6 7910 11
8
4
switch switch switch switch switch
FIGURE 3: NOMINAL REDUNDANT ETHERNET RING ARCHITECTURE WITH MiCOM HX5X
SWITCHES
S0207ENa
EP
RS
RP
ES
Primary fiber
Secondary fiber
A B CDE
1 2 35 6 7910 11
8
4
switch switch switch switch switch
FIGURE 4: ETHERNET RING ARCHITECTURE WITH MiCOM HX5X SWITCHES AFTER FAILURE
3.2.4 Performance
To calculate the time end to end, use the following table based on the nominal situation:
Send a Goose frame from… to… Time at
100 Mbps Abbr. Comments
IED 1 to Switch A 22 µs 262 bytes + inter-frame
Switch A to IED 2 22 µs Store and forward mechanism
Switch A to the network 2 µs tl Repeater latency time
Propagation time to the fiber µs 4.8 µs /km
Network to network 2 µs tl Repeater latency time
When the frame circulates on the ring, the transit time is only tl.

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3.2.5 Benefits
• Ultra fast ring redundancy capability (<1 ms reconfiguration)
• Ultra fast propagation in the ring
• Specific frame control mechanism (store and forward)
• Ring management
• Watchdog relay for supervision
3.3 MiCOM H35x functional composition
The figure below shows the MiCOM H35x main functional blocks.
Redundant AC/DC power supply
(power port)
2 * 100Base Fx
6 * 10/100Base Tx
(Com. Ports)
alarm
II/O ports
AC/DC power supply
(power port)
Earth
(Earth port)
S0208ENb
Switch 10/100Mb/s
LED
FLASH
Ring Management
LED
Power supply
Power supply
Power
management
FIGURE 5: MiCOM H352
The central part manages the switching of up to eight Ethernet links. A FLASH Memory
stores the switching algorithm and manages the minimum parameters of the Ethernet
switching algorithm.
The board has two to six copper connections and two to six optical connections (multi mode
or single mode).
LEDs and alarm contacts are defined to check that the product operates correctly.
A redundant power supply provides the device with AC and/or DC voltage; the supported
ranges are the most common in electrical plants.
3.4 Power management
If a cable is not connected to a port, most of the circuitry for that port is disabled to save
power.
3.5 Ethernet Port Switching Features
Due to auto-negotiation, MiCOM H35x automatically determines the speed of its
transmission layer, 10/100 Mbps, half or full duplex.
3.5.1 10Base Tx and 100Base Tx
The copper ports are half/full duplex and auto-sense the transmission speed. They will auto-
negotiate with the connected device to determine the optimal speed. When the connected
device is only capable of transmitting at 10 Mbps, the MiCOM H35x follows at 10 Mbps.

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3.5.2 100Base Fx
The fiber optic ports are full duplex at 100 Mbps.
3.6 Ethernet Management
3.6.1 Address lookup
Each Ethernet device inserts its unique “MAC address” into each message it sends. The port
on the MiCOM H35x used for a given MAC address is automatically learnt when a frame is
received from that address.
Once an address is learnt, the MiCOM H35x will forward frames to the appropriate port.
Up to 1024 MAC addresses can be stored and monitored at any time.
3.6.2 Auto-negotiation and speed-sensing
All six RJ45 ports of the MiCOM H352/354 independently support auto-negotiation for
speeds in the 10BaseT and 100BaseTx modes. Operation is according to the IEEE 802.3u
standard.
3.6.3 Forwarding
MiCOM H35x supports the store and forward mechanism. MiCOM H35x forwards messages
with known addresses to the appropriate port. Messages with unknown addresses,
broadcast messages and multicast messages are forwarded out to all ports except the
source port.
3.6.4 Priority tagging
802.1p priority is enabled on all ports.
3.6.5 SNMP v2
Simple Network Management Protocol is the network protocol developed to manage devices
in an IP network. SNMP v2 relies on a Management Information Base (MIB) that contains
information about parameters to supervise. A MIB's format is a tree structure, with each node
identified by a numerical Object IDentifier (OID). Each OID identifies a variable that can be
read or set via SNMP with the appropriate software. The information in MIBs is standardized.
3.6.5.1 H35x MIB Structure
The SNMP MIB consists of distinct OIDs, each of which refers to a defined collection of
specific information used to manage devices on the Aipqlj ring. The Aipqlj MIB uses
three types of OID.
System:
Address Name
0 Ccitt
1 ISO
3 Org
6 DOD
1 Internet
2 mgmt
1 Mib-2
1 sys
1 sysDescr Aipqlj repeater
3 sysUpTime xday yh:zm:zzs:yyms
4 sysName
FIGURE 6: H35X MIB STRUCTURE

Global Documentation H35x/EN GL/D23
MiCOM H35x Page 17/38
RMON:
Address Name
0 Ccitt
1 ISO
3 Org
6 DOD
1 Internet
2 mgmt
1 Mib-2
16 Rmon
1 stat
1 etherstat
1 9 Port number (*)
10 etherStatsIndexetherStatsUndersizePkts
12 etherStatsIndexetherStatsOversizePkts
13 etherStatsIndexetherStatsJabbers
14 etherStatsIndexetherStatsCollisions
15 etherStatsIndexetherStatsPkts64Octets
16 etherStatsIndexetherStatsPkts65to127Octets
17 etherStatsIndexetherStatsPkts128to255Octets
18 etherStatsIndexetherStatsPkts256to511Octets
19 etherStatsIndex
etherStatsPkts512to1023Octets
*Port number: 1 to 6 for the RJ45, port 7 management, port 8 ring
3.6.5.2 SNMP Software
Various “SNMP Client software” tools can be used with the MiCOM H35x range.
ALSTOM'RID does not provide such tools.
Any MIB Browser Software performing the basic SNMP operations (such as GET,
GETNEXT, GETRESPONSE…) can work with the MiCOM H range.

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4. TECHNICAL DATA
4.1 MiCOM H35x Range
Ports 10/100BaseTx Copper 100 BaseFx
Multimode (ring)
100 BaseFx
Single Mode
(ring)
MiCOM H352-V2 6 2 (ST) -
MiCOM H354-V2 6 - 2 (SC)
Ports 10/100Base
Tx Copper
10/100BaseFx
Multimode
100 BaseFx
Multimode (ring)
100 BaseFx
Single Mode
(ring)
MiCOM H356 2 4 (LC) 2 (LC) -
MiCOM H358 2 4 (LC) - 2 (LC)
4.2 CONFORMITY
(As per Article 10 of EC Directive 2006/95/EC).
The products designated “MiCOM H352-V2”, “MiCOM H354-V2” have been designed and
manufactured in compliance with standard IEC 60255-27:2005 and are compliant with
European Commission Low Voltage Directive 2006/95/EC.
4.3 Ethernet Port Characteristics
4.3.1 10/100BaseTx Port
Connector type Shielded RJ45 jack
Twisted pair cable Cat 5
Max. cable length with Cat 5 100 m
FIGURE 7: 10/100BASETX PORT
4.3.2 100BaseFx Multimode Port (H352)
Fiber port connector ST
Optimal fiber cable 62.5/125 µm or 50/125 µm
Center wavelength 1310 nm
TX output power -19 dBm
RX input sensitivity -31 dBm
Maximum distance 2000 m
FIGURE 8: 100BASEFX MULTIMODE PORT (H352)
4.3.3 100BaseFx Single Mode Port (H354)
Fiber port connector SC
Optimal fiber cable 9/125 or 10/125 µm
Center wavelength 1310 nm
TX output power -15 dBm
RX input sensitivity -34 dBm
Maximum distance 20,000 m *
FIGURE 9: 100BASEFX SINGLE MODE PORT (H354)
* On request, 40 or 90 km are available.