red lion EL228 Guide d'installation

Marque: red lion

Modèle: EL228

Catégorie: Commutateurs réseau

Taper: Guide d'installation

www.redlion.net

EL228

Industrial Ethernet

Managed Switch

Installation Guide

Revision: 16 January 2014

EL228 Installation Guide Rev 16-Jan-14 Page 2 of 34

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EL228 Installation Guide Rev 16-Jan-14 Page 3 of 34

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):

Quick Start Guide

19” Brackets & Screws

CD with:

 Manuals

 Drawings

 And more

SFP Plugs

Screw

Plugs

EL228 Installation Guide Rev 16-Jan-14 Page 4 of 34

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

First release.

Note: All information in this document is subject to change without notice.

EL228 Installation Guide Rev 16-Jan-14 Page 5 of 34

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, 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 Rev 16-Jan-14 Page 6 of 34

CAUTIONS POUR INSTALLATION

S'il vous plaît lire attentivement les consignes de sécurité suivantes avant d'installer ou

d'effectuer un entretien sur l'appareil. Cet appareil est adapté pour utilisation de Classe I,

Division 2, Groupes A, B, C, D endroits dangereux ou endroits non-dangereux.

Note: Seulement les EL228-DD-1 et EL228-D0-1 sont approuvés pour les endroits Zone 2 (ATEX).

 Avertissement: Ces produits ne doivent pas être utilisés pour remplacer le verrouillage de sécurité

approprié. Aucun dispositif basé sur un logiciel (ou tout autre dispositif à l'état solide) devraient

jamais être conçus pour être responsable de l'entretien de l'équipement consécutifs ou la sécurité

du personnel. En particulier, Red Lion décline toute responsabilité pour les dommages, directs ou

indirects, résultant de l'utilisation de cet équipement dans n'importe quelle application. Tout courant,

câblage entrée et sortie (I / O) doit être conforme aux méthodes de câblage à la Classe I, Division 2

et conformément à l'autorité compétente. Référer à la section 1 pour les autres avertissements

d’installation importante.

 Avertissement: Installation, entretien et l'enlèvement de l'interrupteur doivent être effectués par du

personnel qualifié.

 Avertissement: Installez les Commutateurs Gérés conformément aux codes électriques locaux et

nationaux.

 Avertissement: L’appareil doit être correctement mis à la terre afin de se conformer aux normes

internationales.

 Avertissement: Ne pas se connecter à une source d'alimentation CA sans une prise de terre.

 Avertissement: Ce produit ne contient pas de pièces réparables par l'utilisateur.

 Avertissement: Ne pas travailler sur le matériel pendant les périodes d'activités de la foudre.

 Avertissement: Ne branchez pas une ligne téléphonique dans l'un des connecteurs RJ45 Ethernet.

 Avertissement: L'exposition à certains produits chimiques peut dégrader les propriétés

d’étanchéité des matériaux utilisés dans les relais étanche périphérique.

 Avertissement (risque d’explosion): La substitution de tout composant peut nuire à la conformité

de Classe I, Division 2 (Zone 2).

 Avertissement (ATEX): Dans les endroits dangereux, ces produits doivent être utilisés dans des

panneaux de commande verrouillés ou dans des étagères clos. L’enclos doit être adapte à cet

endroit. Un enclos classé IP54 minimum est nécessaire pour la Zone 2 (ATEX), sauf si un degré de

protection équivalent est fourni par l’emplacement.

 Avertissement (risque d’explosion): Lorsque dans des endroits dangereux, débranchez le cordon

d’alimentation avant de remplacer ou de brancher des modules.

 Avertissement (risque d’explosion): Ne débranchez pas l’équipement pendant que le circuit est

direct ou à moins que l’environnement soit connu pour être libre de concentrations inflammables.

 Avertissement (risque d’explosion): Dans les endroits dangereux ou potentiellement dangereux,

ne pas séparer une partie de l'unité sous tension. Seulement utilisez l'appareil pour les connexions

internes.

 Avertissement (risque d’explosion): Pas de remplacement à chaud des modules dans les zones

dangereuses.

EL228 Installation Guide Rev 16-Jan-14 Page 7 of 34

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

EL228 Installation Guide Rev 16-Jan-14 Page 8 of 34

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.

EL228 Installation Guide Rev 16-Jan-14 Page 9 of 34

Warranty Statement

Red Lion, manufacturer of Red Lion products, warrants to Buyer that products, except software,

manufactured by Red Lion will be free from defects in material and workmanship. Red Lion's obligation

under this warranty will be limited to repairing or replacing, at Red Lion's option, the defective parts within

five (5) years 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 Red Lion. Buyer will prepay all freight charges to return any products to the repair facility

designated by Red Lion.

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, Red Lion 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 Red Lion or Red Lion’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. Red

Lion's liability shall not exceed the price of the individual units, which are the basis of the claim. In no event

shall Red Lion 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 Red Lion for further instructions.

Getting Support

For local support please contact your regional Red Lion office.

Otherwise, to get product information or contact Red Lion directly:

 Latest product info: http://www.redlion.net

 E-mail: [email protected]

 Phone: 1-877-432-9908

 Fax: 1-518-877-8346

 Mailing address: Red Lion Controls, 20 Willow Springs Circle, York, PA 17406, USA

Products Covered

This manual applies to the following products:

 EL228 28-port managed industrial Ethernet rack-mount switch

EL228 Installation Guide Rev 16-Jan-14 Page 10 of 34

Contents

Section 1

General Information

Page 11

Section 2

Installation and Mounting

Page 13

Section 3

Thermal Considerations

Page 17

Section 4

Power and Output Wiring

Page 18

Section 5

Communication Wiring

Page 22

Section 6

LED Indicators

Page 27

Section 7

Reset Button

Page 28

Section 8

Hi-Pot Testing

Page 29

Section 9

Technical Specifications

Page 31

Section 10

Service Information

Page 33

EL228 Installation Guide Rev 16-Jan-14 Page 11 of 34

Section 1

General Information

Overview

The Red Lion 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. Red Lion’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 Rev 16-Jan-14 Page 12 of 34

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 ), 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)

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 Red Lion regarding proper disposal.

RoHS compliance

These devices comply with the RoHS directive and are considered lead and other

hazardous substance free.

EL228 Installation Guide Rev 16-Jan-14 Page 13 of 34

Section 2

Installation and 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.

Use standard rack fasteners (not supplied with the 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.

Important Note: Make sure to read Section 3 regarding thermal

considerations before installing your switch.

EL228 Installation Guide Rev 16-Jan-14 Page 14 of 34

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 Rev 16-Jan-14 Page 15 of 34

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 Rev 16-Jan-14 Page 16 of 34

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

WECO

EIA

WECO

ETSI

1.00"

[25.4]

1.00"

WECO

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]

Console port

Mechanical Dimensions for the EL228 and Brackets

Note: AutoCAD and other drawings are available on the CD or at:

www.redlion.net

EL228 Installation Guide Rev 16-Jan-14 Page 17 of 34

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

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 Rev 16-Jan-14 Page 18 of 34

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.

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.

EL228 Installation Guide Rev 16-Jan-14 Page 19 of 34

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.

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.

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.

Two #10-32 Screws

for NEBS Compliant

Safety Grounding

0.63"

[15.88mm]

Ground lug not included

EL228 Installation Guide Rev 16-Jan-14 Page 20 of 34

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

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.

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red lion EL228 Guide d'installation

Marque: red lion

Modèle: EL228

Catégorie: Commutateurs réseau

Taper: Guide d'installation

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