Sixnet EL228 User manual

1
www.sixnet.com
EL228
Industrial Ethernet
Managed Switch
Installation Guide
Revision: 16 November 2012

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 2 of 32
This page intentionally left blank.

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 3 of 32
Management Guide
Installation Guide
EL228
Industrial Ethernet Switch
Layer 2 with 24 + 4G ports:
24 100BASE-BX (SFP) ports
2 1000BASE-T (RJ45) ports
2 combination Gigabit (RJ45/SFP) ports
Included with the switch (typically):
Quick Start Guide
19” Brackets & Screws
CD with:
Manuals
Drawings
And more
SFP Plugs
Screw
Plugs

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 4 of 32
About This Guide
Purpose
This guide gives specific information on how to properly install and maintain the switch.
Audience
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.
Conventions
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
Revision 04
Copyright & Trademarks
Copyright 2012 Sixnet Inc. All Rights Reserved.
Note: All information in this document is subject to change without notice.

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 5 of 32
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) areas.
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 warnings.
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 and Zone 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 location.
Warning (explosion hazard): When in hazardous locations, disconnect power before servicing units.
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.
Warning (explosion hazard): No hot swapping of modules in hazardous locations.

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 6 of 32
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:
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 operation.
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.
Direct Current (DC)
Alternating Current
Protective Conductor Terminal

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 7 of 32
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: www.sixnet.com
E-mail: [email protected]
Phone: [phone]
Fax: [phone]
Mailing address: Sixnet Technology Park, 331 Ushers Road, Ballston Lake, NY 12019, USA
Products Covered
This manual applies to the following products:
EL228 28-port managed industrial Ethernet rack-mount switch

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 8 of 32
Contents
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 29
Section 10
Service Information
Page 31

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 9 of 32
Section 1
General Information
Overview
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.
Basic Operation
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.
General
Specifications
These general specifications apply to these industrial Ethernet switches. Refer to Section 7 for complete
technical specifications.
Number of ports
28 Ethernet ports
Ethernet Switch Type
Managed
Ethernet Switch Mode
Store and forward, wire-speed, non-blocking
Ethernet Protocols
All standard IEEE 802.3 protocols supported
Ports 1 through 24
SFP for pluggable transceivers of type 10/100 Mbps copper RJ45 or 100
Mbps fiber optic
Ports 25 and 26
Gigabit combination ports with both RJ45 (10/100/1000) and SFP slots for
100 or 1000 Mbps fiber transceivers
Ports 27 and 28
Gigabit RJ45 ports for 10/100/1000 Mbps connections
RJ45 Ports Operation
Auto-negotiation, auto-mdi/mdix-crossover and auto-polarity
Fiber Optic Type
Multimode, singlemode, long-haul or special application
Package style
1U 19” rack mount

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 10 of 32
Compliances
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
standards:
CE per Low Voltage Directive and EN/IEC 61010-1
UL508 (Industrial control equipment) 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) areas.
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.

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 11 of 32
Section 2
Installation Mounting
Overview
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.
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.
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:
Make sure to read Section 3 regarding thermal considerations before installing your switch.
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.
Use standard rack fasteners (not supplied with the switch).

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 12 of 32
Mounting
Brackets
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.

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 13 of 32
Standard 19” bracket
Part #: EK1-BRCKT-19
(set of 2)
Optional ETSI bracket
Part #: EK1-BRCKT-ETSI
(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
Part #: EK1-BRCKT-WALL
(set of 2)

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 14 of 32
Mechanical Dimensions for the EL228 and Brackets
1U
0.55"
[14.0]
0.25"
[6.4]
1.00"
[25.4]
2.25"
[57.2]
0.25"
[6.4] 1.85"
[47.0]
0.45"
[11.4]
Wall Mounting
Brackets
(optional)
can be
mounted
in corners
or centered
Sixnet
EL228 Series
Industrial Ethernet
Rack Switch
Console port
ETSI
or
WECO
EIA
EIA
EIA
WECO
or
ETSI
1.00"
[25.4]
[25.4]
1.00"
WECO
or
ETSI
Dimensions:
Inches [mm]
17.30"
[439.4]
12.00"
[304.8]
1.75"
[44.5]
0.50" [12.7] typ. for SFP fiber
17.50"
[444.5]
18.90"
[480.1]
3.75"
[95.2]
7.00"
[177.8]
7.50"
[190.5]
8.65"
[219.7]
8.15"
[207.0]
4.90"
[124.5]
4.40"
[111.8]
4.40"
[111.8]
4.90"
[124.5]
8.15"
[207.0]
8.65"
[219.7]
7.50"
[190.5]
7.00"
[177.8]
3.75"
[95.2]
3.25"
[82.5]
Many Mounting
Bracket Positions
0.50"
[12.7]
1.25"
[31.8]
1.00"
[25.4]
0.98"
[24.9]
1.25"
[31.8] With ETSI (21" nominal) Brackets (optional)
(Universal ETSI/EIA/WECO mounting holes)
With 19" Brackets (2 included)
(Universal EIA/WECO/ETSI mounting holes)
1.25"
[31.8]
1.25"
[31.8]
With 23" Brackets (optional)
(Universal EiA/WECO/ETSI mounting holes)
With 23/24" Brackets (optional)
(Universal EiA/WECO/ETSI mounting holes)
18.32"
[465.3]
20.27"
[514.9]
21.00"
[533.4]
22.32"
[566.9]
22.90"
[581.7]
23.90"
[607.1]
22.32"
[566.9]
23.32"
[592.3]
0.50"
[12.7]
3.25"
[82.5]
1.0" [25.4] typ. for SFP copper RJ45
0.76" [19.3]
0.76" [19.3]
Console port
Note: AutoCAD and other drawings are available on the CD or at: www.sixnet.com

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 15 of 32
Section 3
Thermal Considerations
Overview
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 heavy-gauge aluminum case. The
heat is then dissipated from the case via radiation to the surrounding air.
Rack Mounting
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.
0.75" [19.1mm] above switch
0.75" [19.1mm] below switch
other device
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.

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 16 of 32
Section 4
Power 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.
Power Overview
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 85-264 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 (min/max)
Note:
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.
Redundancy
Operation
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 failures.
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.
Universal
Mounting
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.

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 17 of 32
Power Cover and Ground Plug Screws
Power Plug and Grounding Screws
Safety Grounding
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 the switch case. They are
supplied pre-installed on one side of the switch
but they can be moved to the other side as
desired. 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 terminal for each power input.
Use these to terminate the ground wire for each
of your power inputs.
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.
Two #10-32 Screws
for NEBS Compliant
Safety Grounding
0.63"
[15.88mm]
Ground lug not included

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 18 of 32
Power Labeling
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
Power Wiring for
EL228 Switches
P2P2P1
+/L
P1
Pluggable Screw Block
1 2 3 4 5 6 7 8 9 10
Power
Input 1
Power
Input 2
Chassis
GND
-/N -/N +/L
Accepts
14-24 AWG
Wire
AC Power Systems
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 Systems
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 Systems
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
Protection
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.

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 19 of 32
“OK” Alarm
Output
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 or 250 VAC
Minimum load = 10 mVDC, 10 µA
The relay will operate as follows:
Condition
NO Contact
NC Contact
No power to switch
Closed
(shorted to common)
Open
Switch powered with no alarms
Open
Closed
(shorted to common)
Switch powered with an alarm
Closed
(shorted to common)
Open
Alarm Wiring for
EL228 Switches
NCCNO
Pluggable Screw Block
1 2 3 4 5 6 7 8 9 10
Accepts
14-24 AWG
Wire
Alarm
Relay
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 wires.

EL228 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev04 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 20 of 32
Section 5
Communication Ports Wiring
Overview
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 auto-mdi/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
Only.
Either cable
wiring will work!
Straight-thru Cable Wiring
Cross-over Cable Wiring
Pin 1
Pin 1
Pin 1
Pin 3
Pin 2
Pin 2
Pin 2
Pin 6
Pin 3
Pin 3
Pin 3
Pin 1
Pin 6
Pin 6
Pin 6
Pin 2