EL228 installation-guide r04.pdf

Industrial Ethernet
Managed Switch
Installation Guide
Revision: 30 April 2013
This page intentionally left blank.
EL228 Installation Guide
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Management Guide
Installation Guide
Industrial Ethernet Switch
Layer 2 with 24 + 4G:
 24 100BASE-BX (SFP) Ports
 2 1000BASE-T (RJ45) Ports
 2 Combination Gigabit (RJ45/SFP) Ports
Included with the switch (typically):
19” Brackets & Screws
SFP Plugs
Quick Start Guide
EL228 Installation Guide
Rev 30-Apr-13
CD with:
 Manuals
 Drawings
 And more
Page 3 of 33
About This Guide
This guide gives specific information on how to properly install and maintain the switch.
The guide is intended for use by network administrators who are responsible for installing and setting up
network equipment; consequently, it assumes a basic working knowledge of electrical safety and any local,
regulatory or corporate rules for the installation of industrial electrical equipment.
The following conventions are used throughout this guide to show information:
Note or Notice: Emphasizes important information or calls your attention to related features or instructions.
Caution, risk of danger: Alerts you to a potential
hazard that could cause loss of data, or damage the
system or equipment. Documentation must be
consulted in all cases where this symbol is marked.
Typical caution symbol.
Warning, risk of electrical shock: Alerts you to a
potential hazard that could cause personal injury.
Typical warning symbol.
Related Publications
The following publication details the software features of the switch, including the Web interface, CLI and
much more:
EL228 Management Guide
Also, as part of the switch’s software, there is an online web-based help that describes all
management related features.
Revision History
First release.
Copyright & Trademarks
Copyright 2012 Sixnet Inc.. All Rights Reserved.
Note: All information in this document is subject to change without notice.
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Compliance and Safety Information
Installation Warnings
Please read the following safety information carefully before installing or performing
any maintenance on the switch. These products are suitable for use in Class I, Division
2, Groups A, B, C and D hazardous locations or nonhazardous locations only.
Note: Only the EL228-DD-1 and the EL228-D0-1 are approved for Zone 2 (ATEX)
Warning: These products should not be used to replace proper safety interlocking. No
software-based device (or any other solid-state device) should ever be designed to be
responsible for the maintenance of consequential equipment or personnel safety. In
particular, Sixnet disclaims any responsibility for damages, either direct or consequential,
that result from the use of this equipment in any application. All power, input and output (I/O)
wiring must be in accordance with Class I, Division 2 wiring methods and/or in accordance
with the authority having jurisdiction. Refer to section 1 for other important installation
Warning: Installation, maintenance and removal of the switch must be carried out by qualified
personnel only.
Warning: Install the Managed Switches in accordance with local and national electrical codes.
Warning: The unit must be properly grounded to comply with international standards.
Warning: Do not connect to an AC power supply without an earth ground.
Warning: This product does not contain any user serviceable parts.
Warning: Do not work on equipment during periods of lightning activity.
Warning: Do not connect a telephone line into one of the Ethernet RJ45 connectors.
Warning: Exposure to some chemicals may degrade the sealing properties of the materials used in
the Sealed Relay Device.
Warning (explosion hazard): Substitution of any component may impair suitability for Class I,
Division 2 andZone 2 areas.
Warning (ATEX): These products are to be used within locking control panels or rack enclosures in
hazardous locations. The enclosure shall be suitable for this location. A minimum IP54 rated
enclosure is needed for Zone 2 (ATEX) unless an equivalent degree of protection is supplied by the
Warning (explosion hazard): When in hazardous locations, disconnect power before servicing
Warning (explosion hazard): Do not disconnect equipment while the circuit is live or unless the
area is known to be free of ignitable concentrations.
Warning (explosion hazard): In hazardous or potentially hazardous locations, do not separate any
part of unit when energized. Use the unit for internal connections only.
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Warning (explosion hazard): No hot swapping of modules in Hazardous Locations.
Fiber Optic Safety
Warning: When using fiber optic ports, never look at the transmit laser, fiber TX port or fiber
cable ends while the switch is powered on. It is highly recommended to keep the rubber fiber
plugs inserted when the fiber port is not being used.
Hi-Pot (Dielectric) Testing
Caution: This device is designed to withstand a high-potential “hi-pot” (dielectric) test up to
2000 VAC or 2800 VDC (1 minute), or 2400 VAC or 3300 VDC (1 second) according to IEEE
1613. However, the surge circuitry must be bypassed before performing this test. See section 8
for details.
Power Markings
Direct Current (DC)
Alternating Current
Protective Conductor Terminal
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FCC Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including
interference that may cause undesired operation.
Warning: This equipment has been tested and found to comply with the limits for digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Notice: Shielded interface cable must be used in order to comply with emission limits.
Notice: Changes or modification not expressly approved by the party responsible for compliance could void
the user’s authority to operate the equipment.
Industry Canada Statement
This device complies with the limits of Industry Canada per ICES-003. Operation is subject to the following
two conditions:
This device may not cause harmful interference, and
This device must accept any interference received, including interference that may cause undesired
ce dispositif peut ne pas causer l'interférence nocive, et
ce dispositif doit accepter n'importe quelle interférence reçue, y compris l'interférence qui peut causer
l'opération peu désirée.
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Warranty Statement
Sixnet, manufacturer of Sixnet products, warrants to Buyer that products, except software, manufactured by
Sixnet will be free from defects in material and workmanship. Sixnet's obligation under this warranty will be
limited to repairing or replacing, at Sixnet's option, the defective parts within one year of the date of
installation, or within 60 months of the date of shipment from the point of manufacture, whichever is sooner.
Products may be returned by Buyer only after permission has been obtained from Sixnet. Buyer will prepay
all freight charges to return any products to the repair facility designated by Sixnet.
This limited warranty does not cover losses or damages which occur in shipment to or from Buyer or due to
improper installation, maintenance, misuse, neglect or any cause other than ordinary commercial or
industrial applications. In particular, Sixnet makes no warranties whatsoever with respect to implied
warranties of merchantability or fitness for any particular purpose. All such warranties are hereby expressly
disclaimed. No oral or written information or advice given by Sixnet or Sixnet’s representative shall create a
warranty or in any way increase the scope of this warranty.
This limited warranty is in lieu of all other warranties whether oral or written, expressed or implied. Sixnet's
liability shall not exceed the price of the individual units, which are the basis of the claim. In no event shall
Sixnet be liable for any loss of profits, loss of use of facilities or equipment, or other indirect, incidental or
consequential damages.
Note: The EL228 switches have no user serviceable parts. Any unauthorized service will void all
warranties. In the unfortunate event that service is required please contact Sixnet for further instructions.
Getting Support
For local support please contact your regional Sixnet office.
Otherwise, to get product information or contact Sixnet directly:
Latest product info: http://www.sixnet.com
E-mail: mailto: [email protected]
Phone: +1 (518) 877-5173
Fax: +1 (518) 877-8346
Mailing address: Sixnet Technology Park, 331 Ushers Road, Ballston Lake, NY 12019, USA
Products Covered
This manual applies to the following products:
28-port managed industrial Ethernet rack-mount switch
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Section 1
General Information
Page 9
Section 2
Installation and Mounting
Page 11
Section 3
Thermal Considerations
Page 15
Section 4
Power Wiring
Page 16
Section 5
Communication Wiring
Page 20
Section 6
LED Indicators
Page 25
Section 7
Reset Button
Page 26
Section 8
Hi-Pot Testing
Page 27
Section 9
Technical Specifications
Page 28
Section 10
Service Information
Page 31
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Section 1
General Information
The Sixnet EL228 is a 28 port (24 + 4G) industrial Ethernet managed switch designed to
meet the extreme requirements of power substations, traffic control, railway and other
harsh environments. It combines the high performance and security of an enterprise-class
switch with rugged packaging and protected circuitry to meet the needs of the most
demanding applications.
24 fast Ethernet fiber and copper SFP ports, which can be mixed and matched on the
fly, provide the ultimate in port flexibility. Sixnet’s universal mounting features LEDs,
power/ground connections, console ports and bracket positions on both the front and back
of the switch for quick and easy ordering and deployment. By combining all of these
features in one hardened package, the EL228 provides users with the lowest total cost of
ownership of any industrial Ethernet switch in its class.
This manual will help you install and maintain these industrial Ethernet switches.
Installation of these switches is very easy and they will begin to operate as soon as they are
powered up. Though these are fully managed switches, they will act as unmanaged until
they are configured otherwise. Refer to the separate software manual or management
guide for configuration of the advanced networking functionality and security.
Note: This manual only covers the installation and wiring of these switches. Refer
to the separate Management Guide for details on configuring and using any of the
management functions such as SNMP, RSTP, IGMP, VLANs, security, port
mirroring and much more.
Unlike an Ethernet hub that broadcasts all messages out all ports, these industrial Ethernet
switches will intelligently route Ethernet messages only out the appropriate port. The major
benefits of this are increased bandwidth and speed, reduction or elimination of message
collisions, and deterministic performance when tied with real-time systems.
These industrial Ethernet switches support 10BaseT (10 Mbps), 100BaseT (100 Mbps) and
100BaseF (100 Mbps) fiber connections on the first 24 ports. This is accomplished by way
of pluggable SFP transceivers. The 4 Gigabit ports supports 10/100/1000BaseT
(10/100/1000 Mbps) on their RJ45 ports plus 100/1000BaseF (100/1000 mbps fiber) via the
two available SFP cages. All of the copper RJ45 ports will independently auto-sense the
speed/duplex and mdi/mdix-crossover allowing you to use straight or crossed-wired cables.
Fiber optic transceivers are available to make noise-immune multimode and singlemode
connections up to 120 km.
These general specifications apply to these industrial Ethernet switches. Refer to Section 7
for complete technical specifications.
Number of ports
Ethernet Switch Type
Ethernet Switch Mode
Ethernet Protocols
Ports 1 through 24
Ports 25 and 26
Ports 27 and 28
RJ45 Ports Operation
Fiber Optic Type
Package style
EL228 Installation Guide
28 Ethernet ports
Store and forward, wire-speed, non-blocking
All standard IEEE 802.3 protocols supported
SFP for pluggable transceivers of type 10/100 Mbps copper
RJ45 or 100 Mbps fiber optic
Gigabit combination ports with both RJ45 (10/100/1000) and
SFP slots for 100 or 1000 Mbps fiber transceivers
Gigabit RJ45 ports for 10/100/1000 Mbps connections
Auto-negotiation, auto-mdi/mdix-crossover and auto-polarity
Multimode, singlemode, long-haul or special application
1U 19” rack mount
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These industrial Ethernet Switches meet the following standards plus others:
Sixnet Inc. is an ISO9001:2008 certified company (FM 65232) since 1996. These devices
are designed, developed and manufactured per an ISO9001 quality management system.
Electrical safety
These devices have been designed to meet the basic safety requirements of the following
 CE per Low Voltage Directive and EN/IEC 61010-1
 UL508 (Industrial control equipment ), ANSI / ISA12.12.01 (Hazardous Locations)
 CSA C22.2 142/213 (per cUL)
 Zone 2 (ATEX), Only EL228-DD-1 and EL228-D0-1 are approved for Zone 2 (ATEX)
EMC (emissions and immunity)
 CE per the EMC directive
 IEC 61000-6-2: Immunity in industrial environments
 IEC 61000-6-4: Emissions in industrial environments
 FCC part 15 and ICES 003; Class B. See FCC statement on a previous page.
 EN 55022 (CISPR22) Class B
 IEC 61850: EMC immunity, mechanical and climatic conditions in power substations
 IEC/TS 61000-6-5: EMC immunity in power substation environments
 IEEE 1613: EMC and climatic conditions in power substations
WEEE compliance
These devices comply with the WEEE directive. Do not throw away these devices in the
standard trash. Contact Sixnet regarding proper disposal.
RoHS compliance
These devices comply with the RoHS directive and are considered lead and other
hazardous substance free.
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Section 2
Installation and Mounting
These industrial Ethernet switches are designed to be mounted in an industry standard rack
or directly to any flat surface. Each switch is supplied with a standard set of 19” (EIA) rack
mounting brackets. Optionally, other mounting brackets are available. See the next page for
details on utilizing the mounting brackets.
Important Note: Make sure to read Section 3 regarding thermal
considerations before installing your switch.
The above image shows an EL228 in front style arrangement (ports in front and power in the back)
mounted in a typical 19” rack, prior to wiring.
Use standard rack fasteners (not supplied with the switch).
The above image shows an EL228 in reverse/rear style arrangement (ports and power in the back)
Mounted in a typical 19” rack, prior to wiring.
Important Note: When you are choosing your mounting option make sure to allow enough
room to route your Ethernet copper or fiber optic cables. Also, please consult the
specifications for your fiber optic cable to make sure you allow for the proper bend radius.
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There are many options for mounting these industrial Ethernet switches. Each switch is
supplied with a standard set of 19” rack mounting brackets. Optionally, mounting brackets for
23”, 24” and ETSI width racks are available. These mounting brackets universally support the
mounting hole spacing per the EIA (1.25”), ETSI (25mm) and WECO (1.00”) standards. Refer
to the mechanical diagram on the next page for details.
There are eight threaded inserts (see red arrows above) on each side of the switch that allow the brackets to be
mounted in numerous positions for the best fit in your rack. The brackets also have extra holes (see blue arrows
above) allowing them to be shifted right or left 1/2 inch. Use the supplied screws to mount the bracket in the desired
position. Plastic screws are also provided to plug the unused holes. See below for possible mounting positions.
In the image above, the brackets are mounted
flush with the front of the switch.
In the image above, the brackets are mounted
flush with the back of the switch.
In the image above, the brackets are mounted so
the front of the switch is setback 1/2 inch.
In the image above, the brackets are mounted in the middle
of the switch to accommodate a centrally located rail.
For the most durable mounting you can use two brackets on each side (as shown in the image above). This is ideal
for applications requiring the highest shock and vibration resistance.
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Standard 19” bracket
Part #: EK1-BRCKT-19
(set of 2)
Optional ETSI bracket
(set of 2)
Optional 23” bracket
Part #: EK1-BRCKT-23
(set of 2)
Optional 23/24” bracket
Part #: EK1-BRCKT-2324
(set of 2)
Optional wall bracket
(set of 2)
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Note: AutoCAD and other drawings are available on the CD or at:
Wall Mounting
can be
in corners
or centered
0.76" [19.3]
Console port
EL228 Series
Industrial Ethernet
Rack Switch
Inches [mm]
Console port
0.50" [12.7] typ. for SFP fiber
1.0" [25.4] typ. for SFP copper RJ45
0.76" [19.3]
With 19" Brackets (2 included)
(Universal EIA/WECO/ETSI mounting holes)
Many Mounting
Bracket Positions
With ETSI (21" nominal) Brackets (optional)
(Universal ETSI/EIA/WECO mounting holes)
With 23" Brackets (optional)
(Universal EiA/WECO/ETSI mounting holes)
With 23/24" Brackets (optional)
(Universal EiA/WECO/ETSI mounting holes)
Mechanical Dimensions for the EL228 and Brackets
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Section 3
Thermal Considerations
The EL228 switches are designed to operate from -40 to +85˚C when they are installed
properly. The switch is cooled via conduction and radiation. There are no fans. Instead there
are various heat-sinks inside the switch to conduct the heat from the components to the heavygauge aluminum case. The heat is then dissipated from the case via radiation to the
surrounding air.
When the switch is rack mounted, for best heat dissipation it is recommended that there be
around 1/2U or more of free air space above and below the switch (as shown below). This
allows the heat to radiate to the air. Any moving air in your rack will improve on the cooling of
the switch.
Note: An air gap is not absolutely necessary but highly recommended when you know that the
switch will experience high heat (> 60˚C) for extended periods of time.
other device
0.75" [19.1mm] above switch
0.75" [19.1mm] below switch
other device
EL228 Rack Mounting Recommendation
Suggestion: If your space is limited and you must choose between an air gap on the bottom
versus an air gap on the top it is better to have the air gap on the top.
BTU / Hour
The power consumption of the switch can be as much as 60 Watts with all ports linked and
active. Based on this, the heat dissipation can be as much as 204 BTU per hour. Please plan
your system accordingly.
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Section 4
Power and Output Wiring
Warning: Please read this section fully before connecting your power input or alarm output!
The unit must be powered down and the power plug removed before any wiring is done to
the power plug. Otherwise, there is a risk of electrical shock if the rules and warnings in this
manual are not properly adhered too.
The EL228 switches are offered with several power options including dual power supplies
that can keep the switch running when there is a power input failure or internal power
supply failure.
Standard Power Supply Options:
Option A0 = single 100/240 (50/60 Hz)VAC or 110/250 VDC power – P1 accepts 85-264
VAC or 90 to 300 VDC (min/max)
Option AA = dual 100/240 (50/60 Hz) VAC or 110/250 VDC power – P1 & P2 accept 85264 VAC or 90 to 300 VDC (min/max)
Option D0 = single +/-24/48VDC power inputs – P1 accepts +/-18 to 75 VDC (min/max)
Option DD = dual +/-24/48VDC power inputs – both P1 & P2 accept +/-18 to 75 VDC
With the dual options the two power supplies are completely isolated so each input/supply
can be connected to a different voltage as long as it is in the range for that supply.
The AA and DD power supply options offer dual redundant power supplies built into the
switch. This protects your system from both power input failures and internal power supply
AA Operation: The AA option provides dual high voltage power inputs. These inputs are
load shared so each input shares around 50% of the load under normal operating
conditions. If a power input or supply fails then the other one will handle 100% of the load.
DD Operation: The DD option provides dual low voltage power inputs. These inputs are
load shared so each input shares around 50% of the load under normal operating
conditions. If a power input or supply fails then the other one will handle 100% of the load.
Caution: Make sure that you know what type of power your switch accepts and make sure
that your input power is within the ranges as defined above. Otherwise, you may damage
your switch by applying the wrong power.
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The EL228 features Universal Mounting (Patent Pending) that allows the power to be
connected to either the front or the back of the switch. The EL228 has power input headers
on both sides, and is supplied with one power plug (typically pre-installed on the port side)
and one power cover (installed on the opposite side).
To move the power plug to the other side, first make sure that all power to the switch is
turned off. Then simply unscrew the plug and the power cover. Each is secured with two
screws. Then swap the positions of the plug and cover, and reattach both with the
aforementioned screws.
Warning: There is a risk of electrical shock if the power plug and cover are not properly in
place. Make sure to reinstall the power plug and power cover (on the side opposite the
power plug) before turning on any power to the switch. Otherwise, when you energize the
switch there could be exposed power pins with potentially high voltage.
Power Cover and Ground Plug Screws
Power Plug and Grounding Screws
For the highest electrical safety the EL228 switches are provided with several grounding
points. First, there are two green ground
screws (see images) that attach directly to
Two #10-32 Screws
the switch case. They are supplied prefor NEBS Compliant
installed on one side of the switch but they
can be moved to the other side as desired.
Safety Grounding
These screws can be used to provide a
NEBS compliant safety ground. Please follow
all the NEBS grounding rules and your own
local requirements (which are not
documented in this manual) to ensure the
safe operation of the switch. Alternatively, the
power plug has a chassis ground terminal
(#4) that can be used to safety ground the
switch. This terminal is internally tied to the
switch case. In addition, there is a ground
Ground lug not included
terminal for each power input. Use these to
terminate the ground wire for each of your power inputs.
Note: The 2 Safety Guard Screws are designed to be used with Ring Lug Terminals. Do not wrap
ground wire around either of the safety ground screws.
Warning: It is recommended that you make your safety ground connections first before
connecting any power to the switch. Make sure that all power is off before making any
power or ground connections to the switch.
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The power headers and plugs will be labeled to guide you in properly connecting your
power. Make sure to reference this labeling when wiring your switch to make sure you are
connecting the appropriate power to the correct terminals. If your switch does not have dual
power inputs then do not connect anything to the terminals labeled Power 2.
Power Header and Plug Labeling
Power Plug Installed
Pluggable Screw Block
1 2 3 4 5 6 7 8 9 10
14-24 AWG
Power Wiring for
EL228 Switches
Input 1
Input 2
AC Power
For AC powered systems the terminals will be labeled as “+/L” for Line (aka Hot), “-/N” for
Neutral and the chassis ground symbol for ground. Connect your AC power input as
correspondingly. Typically the Line (Hot) lead is colored black or brown, the Neutral lead is
colored white or blue and the ground is green or green/yellow.
Positive (+)
DC Power
For positive power systems (such as +24 VDC) put the positive lead on the terminal
marked “+/L” and the return (or ground) lead on the terminal marked “-/N“. If there is a
chassis, earth or safety ground lead then put it on the associated terminal marked with the
chassis ground symbol.
Negative (-)
DC Power
Both the power option ”A” and “D” support negative power systems. If your power is
negative (such as -48 VDC) then you must put the most positive lead on the “+/L” terminal.
Always use a voltmeter to verify which lead is more positive. Then put the more negative
lead on the “-/N” terminal. If there is a chassis, earth or safety ground lead then put it on the
associated terminal marked with the chassis ground symbol.
Reverse Polarity
The “D” option power inputs are reverse polarity protected. This means that if you swap the
+ and – leads then the switch will not be damaged. However, the switch will not operate
when wired this way.
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“OK” Alarm
The switches have an “OK” alarm output that can be tied to a PLC input, an alarm indicator
(visible or audible) or other device to indicate when there is an alarm condition (such as the
loss of a power input). The alarm output is a Form C relay with a normally open (NO),
normally closed (NC) and common (C) screw terminal. Apply an appropriate power source
to the common (C) terminal.
Alarm Output Ratings:
Maximum voltage = 250 VAC or 30 VDC
Maximum current = 2 A @ 30 VDC 250 VAC
Minimum load = 10 mVDC, 10 µA
The relay will operate as follows:
No power to switch
NO Contact
(shorted to common)
NC Contact
Switch powered with no alarms
(shorted to common)
Switch powered with an alarm
(shorted to common)
Pluggable Screw Block
1 2 3 4 5 6 7 8 9 10
14-24 AWG
Alarm Wiring for
EL228 Switches
Wire Gauge &
Screw Torque
The screw terminals are removable and secured by two screws. They will accept wire in the
range of 24 to 14 AWG. When tightening the screws be careful to tighten to a maximum
torque of 4.5 in/lb (0.51 Nm). We recommend a minimum of 18 AWG for the input power
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Section 5
Communication Ports Wiring
The EL228 switches provide connections to standard Ethernet devices such as PLCs,
Ethernet I/O, industrial computers and much more. Three types of communication ports may
be found on these switches: RJ45 (copper) Ethernet ports, SFP (pluggable) Ethernet ports and
console (serial RS232) ports.
Gig RJ45
Ports 25-28
The EL228 has four Gigabit RJ45 copper ports (25-28) that accept 10/100/1000 Mbps twisted
pair cabling. Use data-quality (not voice-quality) twisted pair cable rated category 5E (or better)
with standard RJ45 connectors. Straight through or crossover RJ45 cable can be used
regardless of the device the switch is to be connected to as all the ports are capable of automdi/mdix-crossover detection.
The RJ45 Ethernet port connector bodies on these products are metallic and are connected to
the Chassis GND terminal. Therefore, shielded cables should be used to provide further
protection from electrical noise and interference. Ideally, to prevent ground loops, the cable
shield should be tied to the metal connector body at one end of the cable only. Electrical
isolation is also provided on the Ethernet ports for increased reliability.
Note: The use of shielded cables is required to fully meet the requirements of IEC 61850 and
IEEE 1613 standards.
For Reference
Either cable
wiring will work!
EL228 Installation Guide
Straight-thru Cable Wiring
Pin 1
Pin 1
Pin 2
Pin 2
Pin 3
Pin 3
Pin 6
Pin 6
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Cross-over Cable Wiring
Pin 1
Pin 3
Pin 2
Pin 6
Pin 3
Pin 1
Pin 6
Pin 2
Page 21 of 33
Plug & Connector
Pin Positions
RJ45 Cable
The maximum cable length for 10/100/1000BaseT is typically 100 meters (328 ft.).
Ports 25-26
Ports 25 and 26 are combination gigabit ports that provide both RJ45 and SFP (Small Formfactor Pluggable) connectors. This allows you to use the RJ45 connectors for twisted pair
copper connections or use the SFP connectors for fiber optic connections. The SFP
connectors support 100 Mbps and 1000 Mbps fiber optic transceivers for links up to 120 Km.
Note: For each of these ports (25 and 26) you can only use one of the connectors (RJ45 or
SFP) at a time. If you connect to both at the same time then neither connector may work.
Fast SFP
Ports 1-14
Ports 1 through 24 offer flexible SFP (Small Form-factor Pluggable) connectors that support
10/100 Mbps RJ45 copper or 100 Mbps fiber optic SFP transceivers. On these 24 ports you
can mix and match copper and fiber as desired.
RJ45 Copper SFP
Fiber Optic SFP
Locking / Release
Arm shown in
Locking position
Typical SFP Transceivers
The SFP transceivers just plug into the SFP cages. To lock them in place lift the locking arm
as shown in the image above. To remove a transceiver, first pull down on the locking/release
arm and then pull the transceiver out. The transceivers are “hot-swappable” meaning they can
be plugged in or removed when the switch is powered.
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SFP Ports 1 – 24 with No Transceivers Populated
SFP Ports 1 – 24 with All Fiber Transceivers Populated
Mix and Match SFP Transceivers as Desired
(use supplied plugs to cap unused ports)
Fiber Wiring
The SFP ports accept fiber optic SFP transceivers. These transceivers are sold separately and
are available as multimode, singlemode, long-haul (up to 120 Km or more), BiDi (bidirectional),
WDM and other special types. They typically are offered with an LC style fiber connector.
Refer to the datasheets for these transceivers for more details.
Typical Fiber SFP Transceiver and Dual-LC Cable
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Use standard fiber optic wiring techniques (not covered by this manual) to make your
connections. The corresponding LED will be ON solid or flashing when you have made a
proper connection.
The RJ45 ports will auto-sense for Full or Half duplex operation, while the fiber ports default to
full duplex operation or can be configured for Full or Half duplex. Refer to the software user
manual for details on the software configuration options.
After all Ethernet and/or fiber connections are made, check the LED’s corresponding to the
ports that each of the devices are connected to. Ensure that for each port that is in use, the
LED is on or blinking. If a port LED is off, go back and check for connectivity problems
between that port and the network device connected to that particular port.
Console Port
The switch can be software configured via the DB9M (DB9 male) RS232 console ports.
There is one of these ports located on each of the front and back of the switch. See the
images below. This manual only details on how to connect to this port. Refer to the
software manual for details on how to configure the switch via this port.
RS232 DB9M Ports (one on each side)
Pin 6
Pin 1
RS232 DB9M Port Closeup
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Serial DB9
Console Port
The switch has a standard RS232 male DB9 serial port as shown in the previous images.
The pin-outs are defined below. Use a standard “null-modem” cable between your PC and
the switch. This cable is not supplied but is available from any computer store. If your PC
does not have a serial DB9 port then you can purchase an inexpensive USB to Serial
converter from any computer store, or use the USB port on the switch.
DB9 Female
Pin #
CD in
RD in
TD out
DTR out
DSR in
RTS out
CTS in
RI in
EL228 Installation Guide
DB9F to DB9F
DB9 Female
Pin #
CD in
RD in
TD out
DTR out
DSR in
RTS out
CTS in
RI in
Rev 30-Apr-13
Typical Nullmodem Cable
Page 25 of 33
Section 6
LED Indicators
The EL228 switches have 1 or 2 communication LEDs for each port, dual power LEDs, an
“OK” output LED and an overall status LED.
LED Location on Port Side
LED Location on Other Side
All Ports
All 28 ports each have only 1 LED. Regardless of the type of port (RJ45 versus SFP) or
type of transceiver the LED behaves as follows:
Green LED
ON Solid
Link Only - Indicates that there is a proper Ethernet connection (Link)
but no communications activity is detected.
Green LED
ON Flashing
Link & Activity - Indicates that there is a proper Ethernet connection
(Link) and communications activity is detected.
No link - Indicates that there is not a proper Ethernet connection
(Link). Make sure the cable has been properly connected at both ends.
Status LED
The Status LED indicates the overall health of the switch. It is normally ON solid indicating
that no internal CPU or software problems are detected. It will flash on power up or reset.
Otherwise, if it is OFF or flashing for an extended period of time then a problem is detected.
In this case, please contact Sixnet for support.
Power LEDs
There are two Power LEDs (labeled Pwr 1 for primary power and Pwr 2 for backup power)
that indicate if there is power applied to the respective input.
“OK” Alarm
The “OK” LED indicates the status of the alarm relay output. This LED will be normally ON
when there is no alarm or error condition (such as loss of a power input). Otherwise, when
there is an alarm then it will be OFF.
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Section 7
Reset Button
Reset Button
A reset button has been provided in the event that a full hardware reset of the switch is
required. The reset button is accessed through a small hole in the front of the switch near
the status LED. See the image below. Simply use a straightened paper clip to push in the
reset button. There is one mode of operation as described below.
Reset Button Hole
To simply perform a hardware reset just push in the reset button momentarily. The switch
will then immediately perform a hardware reset which takes around 2 minutes. The switch
will not function or be accessible during this period.
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Section 8
Hi-Pot Testing
This device is designed to withstand a high-potential “hi-pot” (dielectric) test up to
2000 Vrms according to IEEE 1613. However, the surge protection circuitry must
be bypassed before performing this test. See section 8 for details.
Caution: The switch’s surge protection circuitry may be damaged if you do not disconnect
it while performing a “hi-pot” test.
Hi-Pot Slot
The switch features a unique method for temporarily disconnecting the surge
protection circuitry. An opening in the switch case called the “Hi-Pot Slot” provides
for this capability. To perform a Hi-pot test please follow the directions below.
Hi-Pot Slot
Hi-Pot Test
Step 1
Locate and expose the hi-pot slot. It is found on the side opposite the Ethernet ports. You
may need to remove the power plug or power cover.
Hi-Pot Test
Step 2
Acquire or make a hi-pot slot card. You can do this in several ways as follows:
A. Contact Sixnet and ask to be sent a complimentary “hi-pot slot card”.
B. Use a credit-card-sized plastic card (without raised lettering so not an actual credit
card), laminated business card or other similar plastic card. The dimensions should
be as shown in the diagram below.
C. Cut out a card from 0.02” to 0.03” plastic (such as ABS or polycarbonate). The
dimensions should be as shown in the diagram below.
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Hi-Pot Card
from Sixnet
Credit Card or
Business Card
Recommended Hi-Pot Card Dimensions
Hi-Pot Test
Step 3
Insert the card into the slot as shown in the images below. You may need to angle the card
up a little to get it started. Once it is started then push the card into the slot perpendicular to
the face of the switch. As you push the card in, about half way you should feel some
resistance, this is normal. Push the card in until it either stops or there is only about ¼” left
sticking out. See images below.
Card Fully
Hi-Pot Test
Step 4
With the card in place you can now perform the hi-pot (dielectric) test.
Caution: Make sure to remove the card when you are done testing. If you leave the card
in place during normal operations then your switch will not be fully protected from surges.
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Section 8
Technical Specifications
These specifications are subject to change. Contact Sixnet for the latest details. Refer to
the software user manual or datasheet for complete software specifications.
 28 total Ethernet ports
 24 100BASE-X SFP ports
 4 Gigabit with 2 10/100/1000 RJ45 ports and 2
RJ45/SFP combo ports
 RJ45 ports: auto-negotiation (speed/duplex) and autocrossover
 Non-blocking, store and forward, wire-speed
 Switching capacity and forwarding rate: 12.8 Gbps / 9.5
 MAC address table size: 16K
 Jumbo frame: 10K on Gigabit ports
 Ethernet isolation: 1500 Vrms 1 minute
 Flow control: IEEE 802.3x (Full Duplex) & BackPressure (Half Duplex)
 Spanning Tree Protocol (STP per IEEE 802.1D) plus
o IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)
o IEEE 802.1s Multiple Spanning Tree Protocol (MSTP)
o BPDU forwarding and filtering
 Real-Time-Ring™ for high speed fault-tolerant rings
o Link loss recovery: 50 ms/hop
o Switches in ring: <50 for best performance
o Multiple rings are supported (up to 4)
 Virtual Local Area Networks (VLANs)
o 802.1Q tag-based with 256 VLANs and 4K VLAN ID
o 802.1v protocol and port-based VLAN
o Voice and Private VLAN
o QVRP and Q-in-Q (double tagging)
 Link Aggregation Control Protcol (LACP per IEEE
o Static trunk (8 trunks and up to 8 ports per trunk)
o Traffic load balancing
 Internet Group Management Protocol (IGMP)
o IGMP v1, v2 and v3 with up to 255 multicast groups
o IGMP snooping and querying
o Immediate leave and leave proxy
o Throttling and filtering
 Multicast VLAN Registration (MVR)
 IEEE 802.1ab Link layer Discovery Protocol (LLDP)
 Quality of Service (QoS) with 4 priority queues
o Scheduling schemes: WRR and Strict priority
o CoS per IEEE 802.1p and IP DSCP-based
o DiffServ (DS): ingress, egress and remarking
 Rate limiting (ingress and egress)
o 64Kbps to 100/1000Mbps
o Per port CoS
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 Enable / disable ports
 Port security (MAC-based): static and dynamic
 DHCP Snooping and Option 82
 IP Source Guard
 IEEE 802.1x Network Access Control
o Port-based with single or multiple host mode
o Authentication: EAP-MD5, PEAP, TLS, TTLS
o MAC and web authentication
o Guest VLAN and Auto VLAN assignment
o Authentication, Accounting and Authorization
o 5 servers for RADIUS, 1 server for TACACS
o Encryption: MD5, TLS, TTLS, TACACS AAA/3.0
 Access Control List (ACL)
o IP and MAC-based
o VLAN and TCP/UDP port
 Storm Control for broadcast and multicast messages
 HTTPS/SSL for secure Web access
 SSH v1.5/2.0 for secure Telnet access
 SNMPv3 authentication and encryption
 Username and password authentication
 Management access filtering
 IP Address assignment: Static, DHCP and BOOTP
 CLI (Command Line Interface) via console or Telnet
 Web interface (HTTP/HTTPS/SSL)
 SNMP v1, v2, v3 (Simple Network Management
 SNMP Traps for event notification
 RMON (Remote Monitoring): Groups 1, 2, 3 and 9
 sFlow network-wide traffic monitoring
 Dual firmware update system
 Configuration download and upload
 Software upgrade via TFTP
 Port mirroring
 Event / Error / System log
o Local flash
o Remote server via system log (Syslog RFC 3164)
o SMTP (RFC 821) email alarming
 Network Time Protocol for time synchronization
o SNTP (RFC 2030) and NTP (RFC 1305)
 DNS (Domain Name Server) client
 Universal Plug and Play (UPnP)
 IEEE 802.3ah OAM (Operational Administration
 Banner commands
Page 30 of 33
 Dual-redundant internal power supplies
 10-pole screw block can be positioned in front or back
 Power input options:
o +/-24-48 VDC (D option) (absolute min and max: +/18-75 VDC)
o +/-110 - 250 VDC or 100-240 VAC (50/60 Hz)(A
option) (absolute min and max: +/-90 300 VDC or 85-264 VAC
 Power consumption:
o 60 Watts typ. w/ all ports linked
o 28 Watts with no transceivers
o Add 1.25 Watts typical per transceiver
 Protection: current overload and reverse polarity
 Alarm output: form-C relay (NO and NC contacts)
o Max. voltage: 250 VAC, 30 VDC
o Max. current: 2A @ 30 VDC or 250 VAC
 Universal mounting: (Sixnet-exclusive feature – Patent
o Front or rear/reverse wiring with power in front or
o 1U rack mount (19” brackets included)
o Optional 23”, 24", EIA, WECO, ETSI and wall
brackets available
 Ingress protection: IP50 sealed from dust and
 Heavy-gauge corrosion-resistant metal enclosure
 Dimensions (HxWxD): 1.75(1U)x17.3x12”
 Weight (typical): 5.5 lbs (2.5 kg)
EL228 Installation Guide
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 Operating/storage temperature: Designed and tested
to -40 to +85˚C per IEC 60068-2-1/2
 Humidity: 5 to 95% RH (non-condensing) per IEC
 Vibration: 20mm/s from 1 to 150 Hz per IEEE 1613
Class V.S.3
 Vibration: Amp: 3mm from 2-9 Hz, 1g from 9200Hz, 1.5g from 200-500 Hz per IEC 61850-3
 Shock: 30g @ 11ms per IEC 61850-3
 Shock - Free Fall: 250mm distance
 Substation: IEC 61850-3 / IEC 60870-2-2; IEEE 1613
 EMC immunity: IEEE C37.90 and c37.90.1/2/3; IEC/TS
61000-6-5, IEC 60870-2-1, IEC 61000-4
2/3/4/5/6/8/10/11/12/16/17/18/29, IEC 60255-5, CE
 EMC emissions: FCC Part 15;
EN 55022 (CISPR22), CE
 Safety: UL508 / ANSI / ISA12.12.01/CSA C22.2
142/213. EL228-DD-1 and the EL228-D0-1, T4 @
60C (Ambient); EL228-AA-1 and the EL228-A0-1,
T3C @ 60C (Ambient). EN61010-1, Zone 2 (ATEX).
Only the EL228-DD-1 and the EL228-D0-1 are
approved for Zone 2 (ATEX) areas.
 RoHS, WEEE and CE compliant
 ISO9001:2008 certified company
 Warranty: 5 years on design and manufacturing
 MTBF A0/D0 models: 208,166 Hours GB @ 40˚C per
 MTBF AA/DD models: 204,345 Hours GB @ 40˚C per
Page 31 of 33
Section 9
Service Information
We sincerely hope that you never experience a problem with any Sixnet product. If you do
need service, call Sixnet at (518) 877-5173 and choose the option for technical support. A
trained specialist will help you to quickly determine the source of the problem. Many
problems are easily resolved with a single phone call. If it is necessary to return a unit to us,
an RMA (Return Material Authorization) number will be given to you.
Sixnet tracks the flow of returned material with our RMA system to ensure speedy service.
You must include this RMA number on the outside of the box so that your return can be
processed immediately.
One of our Technical Support associates will fill out an RMA request for you. If the unit has a
serial number and date code we will not need detailed financial information. Otherwise, be
sure to have your original purchase order number and date purchased available.
Please supply us with as many details about the problem as you can. The information you
supply will be written on the RMA form and supplied to the repair department before your
unit arrives. This helps us to provide you with the best service, in the fastest manner.
We apologize for any inconvenience that the need for repair may cause you. We hope that
our rapid service meets your needs. If you have any suggestions to help us improve our
service, please give us a call. We appreciate your ideas and will respond to them.
For Your Convenience:
Please fill in the following and keep this manual with your Sixnet system for future reference:
P.O. #:__________________ Date Purchased: ___________________
Purchased From:______________________________________________
To obtain support for Sixnet products:
Latest product info: http://www.sixnet.com
Phone: +1 (518) 877-5173
Fax: +1 (518) 877-8346
E-mail: mailto: [email protected]
Address: Sixnet Technology Park, 331 Ushers Road, Ballston Lake, NY 12019
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shows an
in a
typical 19”
rack prior
to wiring.
This page intentionally left blank.
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