Areva MiCOM H16X User manual

MiCOM H16X
Global Documentation
H16x/EN GL/A11

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CONTENTS
1. SAFETY & HANDLING 3
1.1 Introduction 3
1.2 Safety 3
1.2.1 Health and Safety 3
1.2.2 Explanation of symbols and labels 3
1.2.3 Installing, Commissioning and Servicing 3
1.2.4 Decommissioning and Disposal 4
1.3 Specification upon device/people protection 5
1.4 Handling of electronic equipments 5
1.5 Packing and unpacking 6
1.6 Guaranties 6
1.7 Copyrights & trademarks 7
1.7.1 Copyrights 7
1.7.2 Trademarks 7
1.8 Warnings regarding use of T&D Automation products 7
2. INTRODUCTION 8
2.1 MiCOM Switches 8
2.2 MiCOM Ethernet Switch names 8
2.3 MiCOM H16x 9
3. FUNCTIONAL DESCRIPTION 10
3.1 MiCOM H16x Range 10
3.2 Ultra fast redundant dual-homing capability 10
3.2.1 Dual-homing principles 10
3.2.2 MiCOM H16x Ethernet switch with dual-homing facilities 12
3.2.3 Max time of end to end delay 12
3.2.4 Benefices 12
3.3 MiCOM H16x functional composition 13
3.4 Ethernet Port Switching Features 13
3.4.1 10Base Tx and 100Base Tx 13
3.4.2 100Base Fx 13
3.5 Ethernet Management 13
3.5.1 Address look up 13
3.5.2 Buffering 13
3.5.3 Back off operation 14
3.5.4 Back pressure for half duplex 14

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3.5.5 Broadcast storm protection 14
3.5.6 Auto Negotiation and Speed-Sensing 14
3.5.7 Forwarding 14
3.5.8 Priority tagging 14
3.5.9 VLAN Operation 14
4. TECHNICAL DATA 16
4.1 MiCOM H16x Range 16
5. HUMAN MACHINE INTERFACE 17
6. INSTALLATION 18
6.1 Installing the Controller 18
7. HARDWARE 20
7.1 Indentification Label 20
8. CONNECTION 21
8.1 Ethernet connection 21
8.1.1 Ethernet cable type 21
8.1.2 Ethernet optical fiber 21
9. SETTINGS 22
9.1 Internal Jumpers Meaning 22
10. APPLICATIONS 23
10.1 Fibber Optic budget calculations 23
11. LEXICAL 24
11.1 10Base T and 100Base Tx 24
11.2 100Base Fx 24
11.3 Power management 24
11.4 Address look up 24
11.5 Buffering 24
11.6 Back off operation 24
11.7 Back pressure for half duplex 24
11.8 Broadcast storm protection 24
11.9 Auto Negotiation and Speed-Sensing 24
11.10 Forwarding 24
11.11 Priority tagging 24
11.12 Flow control 25
11.13 VLAN Operation 25

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1. SAFETY & HANDLING
1.1 Introduction
The present document describes the safety, handling, packing and unpacking procedures
applicable to MiCOM H16x Ethernet Switch Range and associated equipments.
1.2 Safety
WARNING: This safety section should be read before commencing any work on the
equipment.
1.2.1 Health and Safety
The information in the Safety Section of the product documentation is intended to ensure
that products are properly installed and handled in order to maintain them in a safe condition.
It is assumed that everyone who will be associated with the equipment will be familiar with
the contents of the Safety Section.
1.2.2 Explanation of symbols and labels
The meaning of symbols and labels may be used on the equipment or in the product
documentation, is given below.
NOTE: The term earth used throughout the product documentation is the
direct equivalent of the North American term ground.
1.2.3 Installing, Commissioning and Servicing
Equipment connections
Personnel undertaking installation, commissioning or servicing work on this equipment
should be aware of the correct working procedures to ensure safety. The product
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.
If there is unlocked access to the rear of the equipment, care should be taken by all
personnel to avoid electrical shock or energy hazards.
Voltage and current connections should be made using insulated crimp terminations to
ensure that terminal block insulation requirements are maintained for safety. To ensure that
wires are correctly terminated the correct crimp terminal and tool for the wire size should be
used.
Before energising the equipment it must be earthen using the protective earth terminal, or
the appropriate termination of the supply plug in the case of plug connected equipment.
Omitting or disconnecting the equipment earth may cause a safety hazard.
The recommended minimum earth wire size is 2.5mm², unless otherwise stated in the
technical data section of the product documentation.
Before energising the equipment, the following should be checked:
• Voltage rating and polarity;
• CT circuit rating and integrity of connections;
• Protective fuse rating;
• Integrity of earth connection (where applicable)

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Equipment operating conditions
The equipment should be operated within the specified electrical and environmental limits.
Current transformer circuits
Do not open the secondary circuit of a live CT since the high level voltage produced may be
lethal to personnel and could damage insulation.
External resistors
Where external resistors are fitted to MiCOM product, these may present a risk of electric
shock or burns, if touched.
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 boards
These must not be inserted into or withdrawn from equipment whist it is energised since this
may result in damage.
Fibre optic communication
Where fibre 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.
1.2.4 Decommissioning and Disposal
Decommissioning:
The auxiliary supply circuit in the MiCOM H16x may include capacitors across the supply or
to earth. To avoid electric shock or energy hazards, after completely isolating the supplies to
the MiCOM H16x (both poles of any dc supply), the capacitors should be safely discharged
via the external terminals prior to decommissioning.
Disposal:
It is recommended to avoid incineration and disposal to. The product should be disposed of
in a safe manner. Any products containing batteries should have them removed before
disposal, in order to avoid short circuits. Particular regulations within the country of operation
may apply to the disposal of lithium batteries.

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1.3 Specification upon device/people protection
The recommended maximum rating of the external protective fuse for this equipment is 16A,
Red Spot type of equipment, unless otherwise stated in the technical data section of the
product documentation.
1. Fuse rating is dependent of auxiliary voltage.
2. Differential protective switch on DC power supply is recommended
3. Differential protective switch on AC power supply is mandatory (printers, PACIS
workstation…)
Insulation class IEC 601010-1:
Class I
EN 61010-1:
Class I
1990/A2:
1993/A2:
1995 This equipment requires a
protective (safety) earth
connection to ensure user
safety.
Insulation Category
(Overvoltage):
IEC 601010-1:
Class III
EN 61010-1:
Class III
1990/A2:
1993/A2:
1995 Distribution level, fixed
installation.
Equipment in this
category is qualification
tested at 5kV peak,
1.2/50µs, 500Ω. 0.5J,
between all supply circuits
and earth and also
between independent
circuits.
Environment: IEC 601010-1:
Pollution degree 2
EN 61010-1:
Pollution degree 2
1990/A2:
1993/A2:
1995 Compliance is
demonstrated by
reference to generic
safety standards.
Product Safety: 72/23/EEC
EN 61010-1:
EN 60950:
1993/A2:
1992/A11:
1995
1997
Compliance with the
European Commission
Law Voltage Directive.
Compliance is
demonstrated by
reference to generic
safety standards.
1.4 Handling of electronic equipments
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 T&D Automation 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 practicable 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.
Before removing a module, ensure that you are a same electrostatic potential as the
equipment by touching the case.

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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.
Do not pass the module to any person without first ensuring that you are both at the same
electrostatic potential. Shaking hands achieves equipotential.
Place the module on an antistatic surface, or on a conducting surface, which is at the same
potential as you.
Store or transport the module in a conductive bag.
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 earthen 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. Instrumentation which may be used for making measurements should be earthen to
the case whenever possible.
T&D AUTOMATION 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.
1.5 Packing and unpacking
All MiCOM H16x Ethernet Switchs 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 H16x Ethernet switch 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.
1.6 Guaranties
The media on which you received T&D AUTOMATION software are 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.
T&D AUTOMATION will, at its option, repair or replace software media that do net execute
programming instructions if T&D AUTOMATION receive notice of such defects during the
guaranty period. T&D AUTOMATION does not guaranty that the operation of the software
shall be uninterrupted or error free.
A Return Material Authorisation (RMA) number must be obtained from the factory and clearly
marked on the package before any equipment acceptance for guaranty work. T&D
AUTOMATION will pay the shipping costs of returning to the owner parts, which are covered
by warranty.
T&D AUTOMATION 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, T&D AUTOMATION reserves the right to make changes to
subsequent editions of this document without prior notice to holders of this edition. The
reader should consult T&D AUTOMATION if errors are suspected. In no event shall T&D
AUTOMATION be liable for any damages arising out of or related to this document or the
information contained in it.

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Expect as specified herein, T&D AUTOMATION makes no guaranties, express or implied
and specifically disclaims and guaranties of merchantability or fitness for a particular
purpose. Customer's rights to recover damages caused by fault or negligence on the part
T&D AUTOMATION shall be limited to the amount therefore paid by the customer. T&D
AUTOMATION 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 T&D AUTOMATION will apply regardless of the form of
action, whether in contract or tort, including negligence. Any action against T&D
AUTOMATION must be brought within one year after the cause of action accrues. T&D
AUTOMATION shall not be liable for any delay in performance due to causes beyond its
reasonable control. The warranty provided herein dues net cover damages, defects,
malfunctions, or service failures caused by owner's failure to follow the T&D AUTOMATION
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.
1.7 Copyrights & trademarks
1.7.1 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 T&D
AUTOMATION.
1.7.2 Trademarks
PACiS, PACiS SCE, PACiS ES, PACiS SMT, PACiS PS, PACiS SCE, pacis.biz and
pacis.com- are trademarks of T&D AUTOMATION. Product and company names mentioned
herein are trademarks or trade names of their respective companies.
1.8 Warnings regarding use of T&D Automation products
T&D AUTOMATION products are not designed with components and testing for a level of
reliability suitable for use in or 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, software fitness,
fitness 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 from the user or applications 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 reasonably steps to protect against system failure,
including -but not limited- to back-up or shut-down mechanisms, not because end-user
system is customised and differs from T&D AUTOMATION’ testing platforms but also a user
or application designer may use T&D AUTOMATION products in combination with other
products. These actions cannot be evaluated or contemplated by T&D AUTOMATION,;
Thus, the user or application designer is ultimately responsible for verifying and validating
the suitability of T&D AUTOMATION 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
MiCOM Ethernet range is designed to address the needs of a wide range of electric plant.
Emphasis has been placed on strong compliance to standards, scalability, modularity and
openness architecture.
These facilitate use in a range of applications from the most basic to the most demanding.
They also ensure interoperability with existing components.
T&D AUTOMATION philosophy is to provide a range of Ethernet products like switch that
match all general requirements needed in electric substation: power supply, immunity to
environmental constraints.
It provides also solutions to specific requirement like for example network redundancy
management.
Each of these products can be used independently, or can be integrated to form a PACiS
system, a Digital Control System (DCS) or a SCADA system.
2.1 MiCOM Switches
Driven by the requirements around the world for advanced applications in SCADA, Digital
Control Systems, Automation, Control and Monitoring, T&D AUTOMATION has designed
and still develop a complete range of products that communicate via Ethernet links.
The specificity of electric plant leads to constraints that are rarely full-filled by standard
Ethernet products : environmental, power supply, redundancy…
This new MiCOM range of Ethernet switch, the MiCOM Hxxx has been specially tailored for
the PACiS system. The MiCOM Hxxx range is designed to address the needs of a wide
range of installations, from small to large and customer applications.
2.2 MiCOM Ethernet Switch names
Basically the naming of Ethernet devices is composed of its mechanical arrangement and its
number of port copper or optical.
The existing mechanical are :
• MiCOM H3xx DIN mounting case and power supply
• MiCOM H1xx PCI Board (getting power supply from PCI BUS into a PC)
• MiCOM H6xx 19’ Rack with up to 4 boards switch and power supply
Reference Description Ethernet Housing
Tx Fx
MiCOM H 140 Switch “simple” Copper 4 0 PCI board
MiCOM H 142 Switch “simple” multi-mode 4 2 PCI board
MiCOM H 152 Switch for ring architecture multi-mode 4 2 PCI board
MiCOM H 162 Dual-Homing star architecture (double
attachment) multi-mode
4 2 PCI board
MiCOM H 340 Switch “simple” Copper 6 0 DIN Rack
MiCOM H 341 Switch “simple” multi-mode 6 1 DIN Rack
MiCOM H 342 Switch “simple” multi-mode 6 2 DIN Rack
MiCOM H 343 Switch “simple” single-mode 6 1 DIN Rack
MiCOM H 344 Switch “simple” single-mode 6 2 DIN Rack
MiCOM H 352 Switch for ring architecture multi-mode 6 2 DIN Rack
MiCOM H 354 Switch for ring architecture single-mode 6 2 DIN Rack

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Reference Description Ethernet Housing
MiCOM H 362 Switch for Dual-Homing star architecture(
double attachment) multi-mode
6 2 DIN Rack
MiCOM H 364 Switch for Dual-Homing star architecture(
double attachment) single-mode
6 2 DIN Rack
MiCOM H 60x Optical Star 19' rack with from 1 to 4 x H64x
and H65x boards
19’ 2U Rack
MiCOM H 621 Optical Multi-mode star-switch board 2 6 Double Europe
MiCOM H 623 Optical Single-mode star-switch board 2 6 Double Europe
MiCOM H 631 Double Multi-mode switch board 2*4 2*1 Double Europe
MiCOM H 633 Double Single-mode star switch board 2*4 2*1 Double Europe
TABLE 1 : MICOM ETHERNET AVAILABLE DEVICE LIST
2.3 MiCOM H16x
The MiCOM H16x range is composed of unmanaged switches, extremely easy to install and
operate, designed to be integrated in an industrial PC or a Shoe-box and implemented in
electric plant environment (IEC 61000-4 & 60255-5).
On the media side, MiCOM H16x supports 10BaseT, 100BaseTX and 100BaseFX as
specified by the IEEE 802.3 committee. With the full duplex and 100BaseTx or 100BaseFx
communications, each port can provide theoretically a full 200 Mbps of data throughput (2
times in duplex the 100Mbps of one link).
The MiCOM H16x is plug and play devices. It can running with the factory setting. To adapt
the switch to your application you simply configure using the jumpers the necessary
parameters . No supervisory processor is requires to operate properly.

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3. FUNCTIONAL DESCRIPTION
The MiCOM H16x is designed to be an Ethernet switch PCI format board. The MiCOM H16x
has to be integrated in a PC (industrial or not depending on environment constraints) or in a
Box with a PCI connector and a Power supply.
3.1 MiCOM H16x Range
The MiCOM H16x range is defined by the kind of Ethernet connection. All equipment of the
MiCOM H16x range has 4 Copper connections through RJ45 and 2 Optical fiber connections
through ST connectors, with speed automatically adjusted from external emitters to 10 or
100 Mbps.
Copper Ethernet link is limited in distance and subject to perturbation. The Ethernet
redundant ring is based on optical inter-switch connection, depending on the link length
between the user may choose between Multi-mode Fibber optic or Single mode Fibber Optic
for long distance.
Model Description Connectors
MiCOM H 162 Fast Ethernet industrial switch
Multimode 1300 nm
4 x RJ45
2 x ST
3.2 Ultra fast redundant dual-homing capability
3.2.1 Dual-homing principles
In dual homing architecture, a device is connected to two different networks. The traffic is
duplicated to the two networks:
Frames are sending at the same time on the two networks and the first arrival is used the
second is thrown. That means that :
− no frame are lost
− best response time
S0464ENa
Dual Homing
MiCOM H162
Dual Homing
MiCOM H162
Dual homing
SWR20x
Dual homing
MiCOM H36
Dual homing
SWR20x
Network N˚1 Network N˚2
Modified frames from network 1
Modified frames from network 2
No modified frames
device device device device device device
FIGURE 1 : DUAL-HOMING MECHANISM

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S0434ENb
2
1
SWITCH
Network A
SWITCH
Network B
B1
B2
A1
A2
Dual Homing
1
Dual Homing
2
3
Dual Homing 3
4
Dual Homing
4
5
« Dual Homing »
Links A et B
6
FIGURE 2 : 4 MiCOM H16x SWITCHES TROUGH 2 OPTICAL STARS
S0465ENa
B
A
Dual Homing
1
2
1
Dual Homing
2
« Dual Homing »
LinK A et B
FIGURE 3 : 2 MiCOM H16x SWITCHES OPTICAL STARS NOT NEEDED

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3.2.2 MiCOM H16x Ethernet switch with dual-homing facilities
The MiCOM H16x is a “repeater” with a standard 802.3 Ethernet switch plus the self healing
manager (SHM). The following drawing describes the internal architecture of such device.
S0466ENa
Power supply
Switch 10/100Mb/s
PCI power supply
2 * 100Base Fx
EEPROM
Parameters :
VLAN, Priority,
MAC address
4 * 10/100Base Tx
(Com. Ports)
alarm
II/O ports
Dual-homing
Management
Link A Dual Homing
Link B Dual Homing
FIGURE 4 : INTERNAL ARCHITECTURE OF MiCOM H16x
3.2.3 Max time of end to end delay
To calculate the time end to end you must to used the following table based on the nominal
situation :
Send a Goose frame from… To… Time at 100Mbps Abr. 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 fibber µs 4,8 µs /km
Network to network 2 µs tl Repeater latency time
When the frame circulates on the ring it does not cross the switch the transit time is only tl.
3.2.4 Benefices
• Ultra fast dual-homing redundant capability
• Fast propagation on the Ethernet network (no transfer time (Store and forward
mechanism ) with the switch
• Specific mechanism of frames checking

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3.3 MiCOM H16x functional composition
With example of MiCOM H162, the Ethernet switch is composed of the function blocs given
below.
S0467ENa
Power supply
Switch 10/100Mb/s
PCI power supply
2 * 100Base Fx
EEPROM
Parameters :
VLAN, Priority,
MAC address
4 * 10/100Base Tx
(Com. Ports)
Alarm
II/O ports
Dual-homing
Management
FIGURE 5 :MiCOM H162
The central part is composed by switching component managing up to 6 Ethernet links. An
EEPROM stores the switching algorithm and manages (via jumpers) minimum parameters of
Ethernet switching algorithm.
4 copper connection are defined in standard. 2 optic connection are defined in the range
(multi-mode or single-mode).
Alarm contacts are defined in standard to check that product operate correctly.
3.4 Ethernet Port Switching Features
MiCOM H16x determines automatically at message reception the speed of its transmission
layer 10 or 100 Mbps MiCOM H16x adapts automatically itself to this transmission speed
and other transmission parameters like half or full duplex.
3.4.1 10Base Tx and 100Base Tx
The copper ports are full/half duplex and auto-sense the transmission speed. They will auto-
negotiate with the connected device to determinate the optimal speed. When the connected
device is only capable of transmitting at 10Mbps, the MiCOM H16x follows the 10Mbps.
3.4.2 100Base Fx
The fiber optic ports are full/half duplex at 100Mbps only limited by . An external switch can
select “half or full duplex” for the two optical ports.
3.5 Ethernet Management
3.5.1 Address look up
Each Ethernet device inserts its unique “MAC address” into each message it send out. The
port on the MiCOM H16x used for given MAC address is automatically learned when a frame
is received from that address. Once an address is learned, the MiCOM H16x will route
messages to only the appropriate port. A time stamp is also placed in memory when a new
address is learned. This time stamp is used with the aging feature, which will remove unused
MAC Addresses from table after 300 seconds. The broadcasting messages are transmit in
the all ports.
Up to 1024 MAC addresses can be stored and monitored at any time.
3.5.2 Buffering
An internal buffer is used for buffering the messages. There are 1024 buffers available. The
factory setting mode adaptively allocates buffers up to 512 to a single port based loading.

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3.5.3 Back off operation
The MiCOM H16x will drop a packet after 16 collisions (J factory setting).
3.5.4 Back pressure for half duplex
The MiCOM H16x will apply « back pressure » when necessary with half-duplex operation.
This «back pressure » will reduce congestion on busy networks (J factory setting).
3.5.5 Broadcast storm protection
Broadcasts and multicasts are limited to 5% of the available bandwidth (J factory setting).
3.5.6 Auto Negotiation and Speed-Sensing
All six RJ45 ports of the MiCOM H16x independently support auto negotiation for speeds in
the 10BaseT and 100BaseTx modes. Operation is according to the IEEE 802.3u standard.
3.5.7 Forwarding
MiCOM H16x supports store and forward mode. MiCOM H16x will forward messages with
know addresses out only the appropriate port. Messages with unknown addresses,
broadcast messages and multicast messages will get forwarded out all ports except the
source port. MiCOM H16x will not forward error packets, 802.3x pause frames or local
paquets.
3.5.8 Priority tagging
802.1p priority is enabled on all ports. A 6 KB buffer is reserved for priority traffic.
3.5.8.1 Flow control
The MiCOM H16x automatically supports standard flow control frames on both the transmit
and receive sides.
On the receive side, if MiCOM H16x receives a pause control frame it will not transmit the
next normal frame until the timer, specified in the pause control frame, expires. If another
pause frame is received before the current timer expires, the timer will be updated with the
new value in the second pause frame. During this period (being flow controlled), only flow
control packets from MiCOM H16x will be transmitted.
On the transmit side, MiCOM H16x has intelligent and efficient ways to determine when to
invoke flow control. The flow control is based on availability of the system resources,
including available buffers, available transmit queues and available receive queues. MiCOM
H16x will flow control a port, which just received a packet, if the destination port resource is
being used up. MiCOM H16x will issue a flow control frame (XOFF), containing the
maximum pause time defined in IEEE standard 802.3x. A hysteresis feature is provided to
prevent flow control mechanism from being activated and deactivated too many times.
MiCOM H16x will flow control all ports if the receive queue becomes full.
3.5.9 VLAN Operation
The VLAN’s are setup by programming the VLAN Mask Registers in the EEPROM. The
perspective of the VLAN is from the input port and which output ports it sees directly through
the MiCOM H16x. For example if port 1 only participated in a VLAN with ports 2 and 9 then
one would set bits 0 and 7 in register 13 (Port 1 VLAN Mask Register). Note that different
ports can be setup independently.
An example of this would be where a router is connected to port 9 and each of the other
ports would work autonomously. In this configuration ports 1 through 8 would only set the
mask for port 9 and port 9 would set the mask for ports 1 through 8. In this way the router
could see all ports and each of the other individual ports would only communicate with the
router.
All multicast and broadcast frames adhere to the VLAN configuration. Unicast frame
treatment is a function of register 2 bit 0. If this bit is set then unicast frames only see ports
within their VLAN. If this bit is cleared unicast frames can traverse VLAN’s. VLAN tags can
be added or removed on a per port basis.

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Further, there are provisions to specify the tag value to be inserted on a per port basis. The
table below briefly summarizes VLAN features.
For more detailed settings see the EEPROM register description.
Register(s) Bit(s) Global / Port Description
4-12 2 Port Insert VLAN Tags – If specified, will add VLAN tags
to frames without existing tags
4-12 1 Port Strip VLAN Tags If specified, will remove VLAN
tags from frames if they exist
2 0 Global VLAN Enforcement – Allows unicast frames to
adhere or ignore the VLAN configuration
13-21 7-0 Port VLAN Mask Registers – Allows configuration of
individual VLAN grouping.
22-39 7-0 Port VLAN Tag Insertion Values – Specifies the VLAN
tag to be inserted if enabled

H16x/EN GL/A11 Global Documentation
Page 16/26 MiCOM H16x
4. TECHNICAL DATA
4.1 MiCOM H16x Range
Ports 10/100BaseTxCopper 100 BaseFx Multi Mode
MiCOM H162 4 2
10/100BaseT(x) Ports
Connector type Shielded RJ45 jack
Twisted pair cable Cat 5
Max cable length with Cat 5 100 m
General
Ethernet
Forwarding mode Store and forward
Memory bandwidth 2 Gbps
MAC Address 1K
Address learning Automatic
Address aging Remove old address after 300s
Collision Drops after 16 collisions
Back pressure Automatic for half duplex
Broadcast storm protection Limits to 5% by strap
Buffering 128 Kb
Illegal frame Dropped per 802.3
Late collision Dropped after 512 bit times
Environmental
Isolation
Dielectric strength I/O ports
Com. ports
2 kV – 50 Hz for 1 minute
1,5 kV dc for 1 minute
IEC 60255-5
Insulation resistance I/O ports
Com. ports
100 MΩat 500 V
100 MΩat 500 V
IEC 60255-5
Impulse voltage I/O ports
Com. ports
5 kV CM 3 kV DM
1 kV CM
IEC 60255-5

Global Documentation H16x/EN GL/A11
MiCOM H16x Page 17/26
5. HUMAN MACHINE INTERFACE
Some LED are used to indicate the state of the links.
The table below indicates the function of each LED :
Function LED number Colour Description
Ports Tx 1 - 2 - 3 - 4 GREEN
GREEN slow blink (~1s)
GREEN fast blink
OFF
Connected without activity
Activity at 10 Mbps
Activity at 100 Mbps
No connection
Upon power up the switch will go through a series of self-testing. The 4 “Ports LED” will flash
a few seconds.

H16x/EN GL/A11 Global Documentation
Page 18/26 MiCOM H16x
6. INSTALLATION
The MiCOM H16x can be easily mounted on a standard PCI bus connector in horizontal or
vertical position.
FIGURE 6 : MiCOM H162 PCI BOARD
6.1 Installing the Controller
To install the MiCOM H16x in the system cabinet:
1. Shut down your computer and disconnect the power cord.
2. Open the computer cabinet and identify an unused PCI slot.
3. Identify an unused PCI slot and remove the slot cover, as illustrated below.