Sixnet EL326 User manual

1
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EL326
Industrial Ethernet
Managed Switch
Installation Guide
Revision: 16 November 2012

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 2 of 29
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EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 3 of 29
Management Guide
Installation Guide
EL326
Industrial Ethernet Switch
Layer 3 with 26 ports:
20 10/100/1000BASE-T ports
4 combination 10/100/1000 SFP ports
2 10GB expansion ports
2 high-speed stacking ports

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 4 of 29
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:
EL326 Management Guide
EL Series 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 06
Copyright & Trademarks
Copyright 2012 Sixnet Inc. All Rights Reserved.
Note: All information in this document is subject to change without notice.

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 5 of 29
Compliance and Safety Information
Installation Warnings
Please read the following safety information carefully before installing or performing any
maintenance on the switch.
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.
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-hazardous locations only.
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: If equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment
may be impaired.
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 (explosion hazard): Substitution of components may impair suitability for Class I, Division 2 (Zone 2) areas.
Warning (explosion hazard): When in hazardous locations, disconnect power before servicing units.
Warning (explosion hazard): Do not disconnect equipment unless power has been switched off or area is known to
be nonhazardous.
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.

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 6 of 29
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

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 7 of 29
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 EL326 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:
EL326 26-port managed industrial Ethernet rack-mount switch

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 8 of 29
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 19
Section 6
LED Indicators
Page 23
Section 7
Technical Specifications
Page 24
Section 8
Hi-Pot Testing
Page 26
Section 9
Service Information
Page 28

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 9 of 29
Section 1
General Information
Overview
The Sixnet EL326 is a 26 port 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.
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 1000BaseT
(1000Mbps) on the first 24 ports via standard RJ45 connectors. These ports will independently auto-
sense the speed/duplex and mdi/mdix-crossover allowing you to use straight or crossed-wired cables.
Ports 21-24 are combination ports and also provide SFP cages that accept industry-standard pluggable
SFP transceivers of various types including multimode, singlemode, long-haul, BiDi and more. These
pluggable SFP ports support 100/1000BaseF (100/1000 Mbps) noise-immune fiber connections up
to 120km.
General
Specifications
These general specifications apply to these industrial Ethernet switches. Refer to Section 7 for complete
technical specifications.
Number of ports
26 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 20
Gigabit RJ45 ports for 10/100/1000 Mbps connections
Ports 21 and 24
Gigabit SFP slots with both RJ45 (10/100/1000) or 100 or 1000 Mbps
fiber transceivers
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

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 10 of 29
Compliances
These industrial Ethernet Switches meet the following standards plus others:
(some qualifications may be pending –contact Sixnet for the latest information)
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 61010-1
UL508 (Industrial control equipment) ISA12.12.01 (Hazardous Locations)
(Pending on DC models)
CSA C22.2 No. 142 and No. 213 (per cUL) (Pending on DC models)
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. See FCC statement on page 6
EN 55022 (CISPR22)
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.

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 11 of 29
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 EL326 in front style arrangement (ports in front 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.

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 12 of 29
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 so
the front of the switch is setback 1/2 inch.
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.

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 13 of 29
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)

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
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Mechanical Dimensions for the EL326 and Brackets
Note: AutoCAD and other
drawings are available on
the CD or at:
www.sixnet.com

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 15 of 29
Section 3
Thermal Considerations
Overview
The EL326 switches are designed to operate from -35˚to +80˚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
EL326 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 120 Watts with all ports linked and active.
Based on this, the heat dissipation can be as much as 408 BTU per hour.
Please plan your system accordingly.

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 16 of 29
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 EL326 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 power 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 power or 110-250 VDC power –P1 & P2 accept 85-264 VAC
or 90 to 300 VDC (min/max)
Option D0 = single +/-24/48 VDC power inputs –P1 accepts +/-18 to 59 VDC (min/max)
Option DD = dual +/-24/48 VDC power inputs –both P1 & P2 accept +/-18 to 59 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.
Special Order Options:
Other power input options may be available. Contact Sixnet for details.
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. Please note
that the AA and DD have different default modes of operation as follows:
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 operate in a
primary/backup scheme. The P1 input should be connected to the primary power source and the P2
input to the backup power source (such as a battery). Under normal operating conditions all the power
is drawn from the P1 input and supply. Only if P1 fails is power drawn from the P2 backup input and
supply.
Note: These default modes of operations can be changed at the factory. Contact Sixnet for details.
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.

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
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Safety Grounding
For the highest electrical safety the EL326 switches are provided with several grounding points. First,
there are two green ground screws (see images)
that attach directly to the switch case. 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.
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
EL326 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
Two #10-32 Screws
for NEBS Compliant
Safety Grounding
0.63"
[15.88mm]
Ground lug not included

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
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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.
“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
EL326 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).

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
www.sixnet.com
Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 19 of 29
Section 5
Communication Ports Wiring
Overview
The EL326 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 1-24
The EL326 has 24 Gigabit RJ45 copper ports 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 EMC 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
ETHERNET
PLUG &
CONNECTOR
Pin Positions
RJ45 Cable
Distance
The maximum cable length for 10/100/1000BaseT is typically 100 meters (328 ft.).

EL326 Installation Guide
Sixnet, Inc. CONNECT. MONITOR. CONTROL.
331 Ushers Road, Ballston Lake, NY 12019 T [phone] F [phone]
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Rev06 16-Nov-12 © 2012. Sixnet. All Rights Reserved.
Page 20 of 29
Gig SFP
Ports 21-24
Ports 21-24 are combination gigabit ports that provide both RJ45 and SFP (Small Form-factor
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 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 21 through 24 offer flexible SFP (Small Form-factor Pluggable) connectors that support 100 or
1000 Mbps fiber optic SFP transceivers. On these 4 ports you can mix and match different types of SFP
fiber transceivers as desired.
Typical SFP
Transceiver
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.
Fiber Wiring
Guidelines
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
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.