Planet ISW-800T-M12, ISW-804PT-M12 User Manual

Industrial IP67 Rated 8-Port 10/100Mbps M12 Ethernet Switch

ISW-800T-M12 & ISW-804PT-M12

User’s Manual

Trademarks

Copyright © PLANET Technology Corp. 2011.

Contents subject to revision without prior notice.

PLANET is a registered trademark of PLANET Technology Corp. All other trademarks
belong to their respective owners.

Disclaimer

PLANET Technology does not warrant that the hardware will work properly in all
environments and applications, and makes no warranty and representation, either
implied or expressed, with respect to the quality, performance, merchantability, or

tness for a particular purpose.

PLANET has made every effort to ensure that this User’s Manual is accurate;
PLANET disclaims liability for any inaccuracies or omissions that may have
occurred.

Information in this User’s Manual is subject to change without notice and does not
represent a commitment on the part of PLANET. PLANET assumes no responsibility
for any inaccuracies that may be contained in this User’s Manual. PLANET makes
no commitment to update or keep current the information in this User’s Manual,
and reserves the right to make improvements to this User’s Manual and/or to the
products described in this User’s Manual, at any time without notice.

If you nd information in this manual that is incorrect, misleading, or incomplete,

we would appreciate your comments and suggestions.

FCC Warning

This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with
the Instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at
his own expense.

CE Mark Warning

This is a Class A product. In a domestic environment, this product may cause radio
interference, in which case the user may be required to take adequate measures.

WEEE Warning

To avoid the potential effects on the environment and human health as a
result of the presence of hazardous substances in electrical and electronic
equipment, end users of electrical and electronic equipment should

understand the meaning of the crossed-out wheeled bin symbol. Do not
dispose of WEEE as unsorted municipal waste and have to collect such WEEE
separately.

Revision

PLANET Industrial IP67 Rated 8-Port 10/100Mbps M12 Ethernet Switch User’s
Manual

For Models: ISW-800T-M12 & ISW-804PT-M12

Revision: 1.0 (August, 2011)

Part No: EM-ISW-800T-M12_804PT-M12_v1.0 (2350-AH0450-000)

Table of Contents

1. Introduction ............................................................................................... 5

1.1 Package Contents ................................................................................ 5

1.2 How to Use This Manual....................................................................... 5

1.3 Product Features ................................................................................. 6

1.4 Product Specications .......................................................................... 7

1.5 Physical Dimension .............................................................................10

2. Installation ...............................................................................................12

2.1 Product Description .............................................................................12

2.1.1 Product Overview ......................................................................13

2.1.2 Switch Front Panel ....................................................................13

2.1.3 LED Indicators ..........................................................................14

2.1.4 M12 DC Power Cable Pinout .......................................................14

2.1.5 10/100Mbps Ports with M12 Interface Cable Pinout ......................15

2.2 Mounting Installation ..........................................................................16

2.2.1 DIN-Rail Mounting .....................................................................16

2.2.2 Wall Mount Plate Mounting .........................................................17

3. Applicaiton ...............................................................................................18

4. Power Over Ethernet Overview ...................................................................22

5. Troubleshooting ......................................................................................... 25

Appendix A: Networking Connection .................................................................26

A.1 Switch’s RJ-45 Pin Assignments ...........................................................26

A.2 RJ-45 Cable Pin Assignments ...............................................................26

5

1. Introduction

1.1 Package Contents

Check the contents of your package for following parts:

Industrial IP67 Rated M12 Ethernet Switch x 1 l

User's Manual x 1 l

1.2m M12-to-RJ45 UTP Cable x 1 l

1.2m M12 Power Cable x 1 l

DIN Rail Kit x 1 l

Wall Mount Kit x 1 l

If any of these are missing or damaged, please contact your dealer immediately,
if possible, retain the carton including the original packing material, and use them
against to repack the product in case there is a need to return it to us for repair.

In the following section, the term “Industrial M12 Ethernet Switch” means the
ISW-800T-M12 and ISW-804PT-M12.

1.2 How to Use This Manual

This Industrial M12 Ethernet Switch User Manual is structured as follows:

Chapter 2 Installation

The chapter explains the feature, functionality and the physical installation of the
Industrial M12 Ethernet Switch.

Chapter 3 Application

The chapter explains the Industrial M12 Ethernet Switch application.

Chapter 4 Power over Ethernet overview (ISW-804PT-M12 only)

The section explains the IEEE 802.3af Power over Ethernet theories.

Chapter 5 Troubleshooting

The chapter explains the troubleshooting of the Industrial M12 Ethernet Switch.

Appendix A

This chapter contains cable information of the Industrial M12 Ethernet Switch.

6

1.3 Product Features

Physical Port

8-Port 10/100Mbps M12 Connector with IP67 protection l

4-Port IEEE 802.3af PoE Ports l (ISW-804PT-M12) (Port 5 to port 8)

Layer 2 Features

Supports Auto-negotiation and 10/100Mbps half / full duplex mode l

High performance Store and Forward architecture, runt/CRC ltering eliminates l

erroneous packets to optimize the network bandwidth

Prevents packet loss with back pressure (Half-Duplex) and IEEE 802.3x PAUSE l

frame ow control (Full-Duplex)

Backplane (Switching Fabric): 1.6Gbps l

Integrated address look-up engine, support 2K absolute MAC addresses l

Automatic address learning and address aging l

CSMA/CD Protocol l

Industrial Case / Installation

IP67 Aluminum metal case / Protection l

DIN Rail and Wall Mount Design l

Waterproof / dustproof design l

12 to 48V DC, redundant power with polarity reverse protect function and l
connective removable terminal block for master and slave power (ISW-

800T-M12)

48V DC, redundant power with polarity reverse protect function and connective l
removable terminal block for master and slave power (ISW-804PT-M12)

Supports EFT protection 6000 VDC for power line l

Supports 6000 VDC Ethernet ESD protection l

-40 to 75 Degree C operating temperature l

7

1.4 Product Specications

Model ISW-800T-M12

Hardware Specication

10/100Base-TX Ports 8 x M12, 4-Pin D-coded female connector

Power Connector 1 x M12, 5-Pin A-Coded male connector

Enclosure IP67 Aluminum

Dimension (W x D x H) 163 x 103 x 53 mm

Weight 976g

Power Requirement

12~48V DC, Redundant power with polarity reverse
protection function

Power Consumption / Dissipation 4 Watts / 13 BTU

Installation DIN rail kit and wall mount ear

ESD Protection 6KV DC

EFT Protection 6KV DC

LED Indicators

Power LED: Power 1 / Power 2 (Green), FAULT (Green)
10/100Base-TX Port (Port-1 to Port-8): LNK/ACT (Green)

Network Cables

10Base-T: 2-Pair UTP Cat.3,4,5 up to 100m (328ft)
100Base-TX: 2-Pair UTP Cat.5, 5e, 6 up to 100m (328ft)
EIA/TIA-568 100-ohm STP (100m, max.)

Switch Specication

Switch Processing Scheme Store-and-Forward

Address Table 2K entries

Flow Control

Back pressure for half duplex
IEEE 802.3x Pause Frame for full duplex

Switch Fabric 1.6Gbps

Throughput (packet per second) 1.19Mpps@64Bytes

Maximum Transmit Unit 1536 bytes

Standards Conformance

Standards Compliance

IEEE 802.3 Ethernet
IEEE 802.3u Fast Ethernet
IEEE 802.3x Full-Duplex Flow Control

Regulation Compliance FCC Part 15 Class A, CE

Stability Testing

IEC60068-2-32 (Free fall)
IEC60068-2-27 (Shock)
IEC60068-2-6 (Vibration)

Environment

Temperature

Operating: -40~75 Degree C
Storage: -40~75 Degree C

Humidity

Operating: 5~95% (Non-condensing)
Storage: 5~95% (Non-condensing)

8

Model ISW-804PT-M12

Hardware Specication

10/100Base-TX Ports 8 x M12, 4-Pin D-coded female connector

IEEE 802.3af PoE Ports 4, port 5 to port 8

Power Connector 1 x M12, 5-Pin A-Coded male connector

Enclosure IP67 Aluminum

Dimension (W x D x H) 163 x 103 x 53 mm

Weight 976g

Power Requirement

48V DC, Redundant power with polarity reverse
protection function

Power Consumption / Dissipation 65 Watts / 221 BTU

Installation DIN rail kit and wall mount ear

ESD Protection 6KV DC

EFT Protection 6KV DC

LED Indicators

Power LED: Power 1 / Power 2 (Green), FAULT (Green)
10/100Base-TX Port (Port-1 to Port-8): LNK/ACT (Green)
PoE Port (Port-5 to Port-8): PoE In-Use (Orange)

Network Cables

10Base-T: 2-Pair UTP Cat.3,4,5 up to 100m (328ft)
100Base-TX: 2-Pair UTP Cat.5, 5e, 6 up to 100m (328ft)
EIA/TIA-568 100-ohm STP (100m, max.)

Switch Specication

Switch Processing Scheme Store-and-Forward

Address Table 2K entries

Flow Control

Back pressure for half duplex
IEEE 802.3x Pause Frame for full duplex

Switch Fabric 1.6Gbps

Throughput (packet per second) 1.19Mpps@64Bytes

Maximum Transmit Unit 1536 bytes

Standards Conformance

Standards Compliance

IEEE 802.3 Ethernet
IEEE 802.3u Fast Ethernet
IEEE 802.3x Full-Duplex Flow Control
IEEE 802.3af Power over Ethernet

Regulation Compliance FCC Part 15 Class A, CE

Stability Testing

IEC60068-2-32 (Free fall)
IEC60068-2-27 (Shock)
IEC60068-2-6 (Vibration)

9

Power over Ethernet

PoE Standard IEEE 802.3af Power over Ethernet / PSE

PoE Power Supply Type End-Span

PoE Power Output 48V DC Per Port, 350mA. Max. 15.4 Watts

Power Pin Assignment 1/2(+), 3/6(-)

PoE Budget 60 Watts

Environment

Temperature

Operating: -40~75 Degree C
Storage: -40~75 Degree C

Humidity

Operating: 5~95% (Non-condensing)
Storage: 5~95% (Non-condensing)

10

1.5 Physical Dimension

ISW-800T-M12 Industrial M12 Ethernet Switch dimension (W x D x H): 163 x

103 x 53mm

Mounting Kit

Mounting Kit

DIN-Rail Kit

Rear View

Front ViewSide View Side View

11

 ISW-804PT-M12 Industrial M12 Ethernet Switch dimension (W x D x H): 163 x

103 x 53mm

Mounting Kit

Mounting Kit

DIN-Rail Kit

Front ViewSide View

Side View

Rear View

12

2. Installation

This section describes the functionalities of the Industrial M12 Ethernet Switch’s
components and guides how to install it on the desktop. Basic knowledge of
networking is assumed. Please read this chapter completely before continuing.

2.1 Product Description

The Industrial M12 Ethernet Switch equipped with IP67 industrial case protection,
the Industrial M12 Ethernet Switch provides a high level of immunity against
electromagnetic interference and heavy electrical surges which are usually found

on plant oors or in curb side trafc control cabinets. The compact, IP67 standard

metal case of Industrial M12 Ethernet Switch allows either DIN rail or wall

mounting for efcient use of cabinet space.

Being able to operate under the temperature range from -40 to 75 Degree C, the

Industrial M12 Ethernet Switch can be placed in almost any difcult environment.

The Industrial M12 Ethernet Switch also possesses an integrated power supply
source with wide range of voltages (ISW-800T-M12 with 12 to 48V DC) and
(ISW-804PT-M12 with 48V DC) for worldwide high availability applications
requiring dual or backup power inputs.

The ISW-800T-M12 equipped with eight 10/100Base-TX auto-negotiation ports M12
connector, the ISW-804PT-M12 equipped with eight 10/100Base-TX auto-negotiation
ports M12 connector with 4-Port IEEE 802.3af PoE Ports (Port 5 to port 8); per
PoE port provide 15.4 Watts PoE output. The M12 connector provides tightly and
strong connection and guarantee stable Ethernet operation performance under high
vibration and shock environment.

The Industrial M12 Ethernet Switch has 2K MAC Address table and offers wire­speed packets transfer performance without risk of packet loss, the high data
throughput of the device makes it ideal for most Fast Ethernet environments. With
a 1.6Gbps internal switching fabric and featuring auto negotiation support in each
Fast Ethernet port, the Industrial M12 Ethernet Switch can handle large amounts of
data in a secure topology linking to a backbone or high capacity servers.

The ow control function enables the Industrial M12 Ethernet Switch to provide fast

and reliable data transfer, all of the M12 RJ-45 copper interfaces in the Industrial
M12 Ethernet Switch support 10/100Mbps Auto-Negotiation for optimal speed
detection through RJ-45 Category 3, 4, 5, 5e, 6 cables. The standard Auto-MDI/
MDI-X support can detect the type of connection to any Ethernet device without
requiring special straight or crossover cables.

13

2.1.1 Product Overview

The PLANET Industrial M12 Ethernet Switch with 8 RJ-45 10/100Mbps ports M12
interfaces, for high-speed network connectivity. The Industrial M12 Ethernet Switch
can also automatically identify and determine the correct transmission speed and
half / full duplex mode of the attached devices with its 8 Fast Ethernet ports. The
M12 Fast Ethernet ports can handle extremely large amounts of data transmission
in a secure topology linking to a backbone or high-power servers, the ISW­804PT-M12 also provide 4 IEEE 802.3af Fast Ethernet PoE ports and per PoE port

provide 15.4 Watts PoE power output. It is an ideal solution to ll the demand of

Industrial environment PoE application.

The Industrial M12 Ethernet Switch also supports Store-and-Forward forwarding
scheme to ensure low latency and high data integrity, eliminates unnecessary

trafc and relieves congestion on critical network paths. With an intelligent address

recognition algorithm, the Industrial M12 Ethernet Switch could recognize up to 2K

different MAC address and enables ltering and forwarding at full wire speed.

2.1.2 Switch Front Panel

Figure 2-1 & 2-2 shows a front panel of Industrial M12 Ethernet Switch.

Figure 2-1: ISW-800T-M12 front panel Figure 2-2: ISW-804PT-M12 front panel

14

2.1.3 LED Indicators

ISW-800T-M12

LED Color Function

PWR 1 Green Lit: indicate the power 1 has power.

PWR 2 Green Lit: indicate the power 2 has power.

FAULT Green Lit: indicate the either power 1 or power 2 has no power.

LNK / ACT Green

Lit: indicate the Switch is successfully connecting to the

network at 10/100Mbps.

Blink: indicate that the Switch is actively sending or

receiving data over that port.

Off: indicate the Switch is not connecting to the network

at 10/100Mbps.

ISW-804PT-M12

LED Color Function

PWR 1 Green Lit: indicate the power 1 has power.

PWR 2 Green Lit: indicate the power 2 has power.

FAULT Green Lit: indicate the either power 1 or power 2 has no power.

LNK / ACT Green

Lit: indicate the Switch is successfully connecting to the

network at 10/100Mbps.

Blink: indicate that the Switch is actively sending or

receiving data over that port.

Off: indicate the Switch is not connecting to the network

at 10/100Mbps.

PoE In-Use
Port 5 to
port 8

Orange

Lit: indicate the Switch port is providing 15.4 Watts PoE

power output.

Off: indicate the Switch port is not providing 15.4 Watts

PoE power output.

2.1.4 M12 DC Power Cable Pinout

The Industrial M12 Ethernet Switch front panel provides one M12 A-coded 5 pin
male connector for DC power input; please use the power cable with M12 A-coded
5 pin female connector from Industrial M12 Ethernet Switch package for DC power
input. The Industrial M12 Ethernet Switch power input port pinout is shown as
below

INPUT

DC 12V~48V

Pinout 1: V1

-

Pinout 2: V1+

Pinout 3: V2+

Pinout 4: V2

-

ISW-800T-M12

V2

V2

V1

V1

3

4

2

1

INPUT

DC 48V

Pinout 1: V1

-

Pinout 2: V1+

Pinout 3: V2+

Pinout 4: V2

-

ISW-804PT-M12

V2

V2

V1

V1

3

4

2

1

15

Please follow the steps below for DC power cable installation on Industrial M12
Ethernet Switch.

1. Plug the DC power cord connector to the power input port of the Industrial M12

Ethernet Switch.

2. Screw the nut on DC power cord female connector to the DC power input male

connector of Industrial M12 Ethernet Switch and make sure the connection is
tight.

Note

Before DC power cord connection, please check and assure your
local DC power source is stable.

2.1.5 10/100Mbps Ports with M12 Interface Cable Pinout

The Industrial M12 Ethernet Switch front panel provides provide eight RJ­45 10/100Mbps ports M12 interfaces, these ports are designed for Ethernet
equipments connection. The Industrial M12 Ethernet Switch 10/100Mbps M12 input
interface pinout is shown as below

Pinout 1: TX+

Pinout 2: RX+

Pinout 3: TX

-

Pinout 4: RX -

ISW-800T-M12/ISW-804PT-M12

TX

RX

RX

TX

1

4

2

3

RJ-45(8-Pin)

Pinouts for the RJ-45(8-Pin) Port

1 8

MDI MDI-X

Pin

1
2
3
6

Singnal

TX+

TX

-

RX+

RX

-

RX+

RX

-

TX+

TX

-

Please follow the steps below for 10/100Mbps M12 cable installation on Industrial
M12 Ethernet Switch.

1. Plug the 10/100Mbps M12 cable male connector to the Ethernet female

connector input port of the Industrial M12 Ethernet Switch.

2. Screw the nut on 10/100Mbps M12 cable male connector to the Ethernet input

female connector of Industrial M12 Ethernet Switch and make sure the connec­tion is tight.

Note

Due to per Ethernet port of Industrial M12 Ethernet Switch is
running at auto negotiation mode. Please assure the opposite
Ethernet devices Ethernet ports are running at auto negotiation
mode also, otherwise, the Ethernet performance will be poor.

16

2.2 Mounting Installation

This section describes how to install the Industrial M12 Ethernet Switch and make
connections to it. Please read the following topics and perform the procedures in
the order being presented.

2.2.1 DIN-Rail Mounting

The DIN-Rail is screwed on the Industrial M12 Ethernet Switch when out of factory.
When need to replace the wall mount application with DIN-Rail application on

Industrial M12 Ethernet Switch, please refer to following gures to screw the DIN-

Rail on the Industrial M12 Ethernet Switch. To hang the Industrial M12 Ethernet
Switch, follow the below steps:

Step 1: Screw the DIN-Rail on the Industrial M12 Ethernet Switch.

Step 2: Lightly press the button of DIN-Rail into the track.

Step 3: Check the DIN-Rail is tightly on the track.

17

Step 4: Please refer to following procedures to remove the Industrial M12 Ethernet

Switch from the track.

Step 5: Lightly press the button of DIN-Rail for remove it from the track.

2.2.2 Wall Mount Plate Mounting

To install the Industrial M12 Ethernet Switch on the wall, please follows the
instructions described below.

Step 1: Remove the DIN-Rail from the Industrial M12 Ethernet Switch; loose the

screws to remove the DIN-Rail.

Step 2: Place the wall mount plate on the rear panel of the Industrial M12

Ethernet Switch.

Step 3: Use the screws to screw the wall mount plate on the Industrial M12

Ethernet Switch.

Step 4: Use the hook holes at the corners of the wall mount plate to hang the

Industrial M12 Ethernet Switch on the wall.

Step 5: To remove the wall mount plate, reverse steps above.

18

3. Applicaiton

In this paragraph, we will describe how to install Industrial M12 Ethernet Switch
and the installation points for the attention.

Public Construction

Control Center

Subway 2

Subway 1

Maintenance Shop

Fiber Switch

ISW-800T-M12

Outdoor
IP Camera

Outdoor
IP Camera

Industrial Gigabit Switch

Industrial Gigabit
Switch

Industrial Managed
Switch

70Km

10Km

30Km

ISW-800T-M12

Outdoor
IP Camera

Outdoor
IP Camera

ISW-804PT-M12

Outdoor PoE
IP Camera

Outdoor PoE
IP Camera

1000

1000

1000

1000Base-SX/LX Fiber-optic

1000

100Base-TX UTP

Public Transmission System

3G Router

NVR

Bus Control Center

Industrial M12
PoE Ethernet Switch

PoE
IP Camera

PoE
IP Camera

PoE
IP Camera

PoE

100Base-TX UTP

PoE

100Base-TX UTP with PoE

19

Railway Transmission System

Passenger
Information System

Entertainment
System

Industrial Backbone
Switch

AP

AP

VoIP

PC

Laptop

Content
Server

PC

ISW-800T-M12

ISW-800T-M12

ISW-804PT-M12

ISW-804PT-M12

Next Stop

PoE IP Camera

PoE IP Camera

PoE IP Camera

N

N

Control Center

PoE

PoE

PoE

PoE

PoE

100Base-TX UTP

PoE

100Base-TX UTP with PoE

Installation Steps

Step 1: Unpack the Industrial M12 Ethernet Switch.

Step 2: Check the DIN-Rail is screwed on the Industrial M12 Ethernet Switch.

(Please refer to DIN-Rail Mounting section for DIN-Rail installation If the
DIN-Rail is not screwed on the Industrial switch). If you want to wall
mount the Industrial M12 Ethernet Switch, then please refer to Wall
Mount Plate Mounting section for wall mount plate installation.

Step 3: To hang the Industrial M12 Ethernet Switch on the DIN-Rail track or wall,

please refer to the Mounting Installation section.

Step 4: Power on the Industrial M12 Ethernet Switch. (Please refer to the M12

DC Power Cable Inputs) The power LED on the Industrial M12 Ethernet
Switch will light up. Please refer to the LED Indicators section for meaning
of LED lights.

20

Step 5: Prepare the twisted-pair, straight through Category 3, 4, 5, 5e, 6 cables

for Ethernet connection.

Step 6: Insert one side of Category 3, 4, 5, 5e, 6 cables into the Industrial M12

Ethernet Switch Ethernet port (RJ-45 port) and another side of Category
3, 4, 5, 5e, 6 cables to the network devices' Ethernet port (RJ-45 port),
ex: switch, PC or Server. The UTP port (RJ-45) LED on the Industrial M12
Ethernet Switch will light up when the cable connected with the network
device. Please refer to the LED Indicators section for LED light meaning.

Step 7: When all connections are all set and LED lights all show in normal, the

installation is complete.

Note

Be sure the connected network devices support MDI/MDI-X. If it
does not support then use the crossover Category 3, 4, 5, 5e, 6
cables.

Department/ Workgroup PoE Switch (ISW-804PT-M12 only)

Providing 4-Port PoE in-line power interface, the ISW-804PT-M12 can easily build
a power centrally-controlled IP phone system, IP Camera system and Wireless AP
group for the enterprise. For instance, up to 4 cameras can be installed around the
corner in the company for surveillance demands or up to 4 Wireless AP to build a

wireless roaming environment in the ofce. Without the power-socket limitation, the
Switch makes the installation of cameras or Wireless AP more easily and efciently.

Outdoor PoE IP Camera

PoE VoIP ATA

PoE IP Phone

Phone

Data+Power

Data+Power

48V DC Power Input

DIN-Rail
Power Supply

DC

PC

PC

PC

PC

PoE

PoE

PoE

PoE

PoE Wireless AP

Laptop

N

N

DC

Power Line (DC)

100Base-TX UTP

PoE

100Base-TX UTP with PoE

Telephone wire

2.4GHz 802.11n

N

Industrial M12
PoE Ethernet Switch

21

Power over Ethernet Powered Device

3~5 Watts

Voice over IP phones

Enterprise can install POE VoIP Phone, ATA and other
Ethernet/non-Ethernet end-devices to the central where UPS
is installed for un-interrupt power system and power control
system.

6~12 Watts

Wireless LAN Access Points

Museum, Sightseeing, Airport, Hotel, Campus, Factory,
Warehouse can install the Access Point any where with no
hesitation.

10~12 Watts

IP Surveillance

Enterprise, Museum, Campus, Hospital, Bank, can install
IP Camera without limits of install location – no need
electrician to install AC sockets.

3~12 Watts

PoE Splitter

PoE Splitter split the PoE 48V DC over the Ethernet cable
into 5/12V DC power output. It frees the device deployment
from restrictions due to power outlet locations, which
eliminate the costs for additional AC wiring and reduces the
installation time.

22

4. Power Over Ethernet Overview

What is PoE?

Based on the global standard IEEE 802.3af, PoE is a technology for wired Ethernet,
the most widely installed local area network technology adopted today. PoE allows
the electrical power necessary for the operation of each end-device to be carried
by data cables rather than by separate power cords. New network applications,
such as IP Cameras, VoIP Phones, and Wireless Networking, can help enterprises
improve productivity. It minimizes wires that must be used to install the network
for offering lower cost, and less power failures.

IEEE 802.3af also called Data Terminal equipment (DTE) power via Media

dependent interface (MDI) is an international standard to dene the transmission

for power over Ethernet. The 802.3af is delivering 48V power over RJ-45 wiring.

Besides 802.3af also dene two types of source equipment: Mid-Span and End-

Span.

Mid-Span

Mid-Span device is placed between legacy switch and the powered device. Mid­Span is tap the unused wire pairs 4/5 and 7/8 to carry power, the other four is for
data transmit.

End-Span

End-Span device is direct connecting with power device. End-Span could also tap
the wire 1/2 and 3/6.

PoE System Architecture

The specication of PoE typically requires two devices: the Powered Source
Equipment (PSE) and the Powered Device (PD). The PSE is either an End-Span

or a Mid-Span, while the PD is a PoE-enabled terminal, such as IP Phones, Wireless
LAN, etc. Power can be delivered over data pairs or spare pairs of standard CAT-5
cabling.

How Power is Transferred Through the Cable

A standard CAT5 Ethernet cable has four twisted pairs, but only two of these are

used for 10BASE-T and 100BASE-T. The specication allows two options for using

these cables for power, shown in Figure 2 and Figure 3:

The spare pairs are used. Figure 2 shows the pair on pins 4 and 5 connected
together and forming the positive supply, and the pair on pins 7 and 8 connected
and forming the negative supply. (In fact, a late change to the spec allows either
polarity to be used).

23

POWER SOURCING
EQUIPMENT (PSE)

POWERED DEVICE
(PD)

SPARE PAIR

SPARE PAIR

SIGNAL PAIR

SIGNAL PAIR

Converter

DC / DC

RX

TX

TX

RX

48V

4

5

1

2

3

6

7

8

4

5

1

2

3

6

7

8

+

-

Converter

Figure 1 - Power Supplied over the Spare Pins

The data pairs are used. Since Ethernet pairs are transformer coupled at each
end, it is possible to apply DC power to the center tap of the isolation transformer
without upsetting the data transfer. In this mode of operation the pair on pins 3
and 6 and the pair on pins 1 and 2 can be of either polarity.

POWER SOURCING
EQUIPMENT (PSE)

POWERED DEVICE
(PD)

SPARE PAIR

SPARE PAIR

SIGNAL PAIR

SIGNAL PAIR

DC / DC

RX

TX

TX

RX

48V

4

5

1

2

3

6

7

8

4

5

1

2

3

6

7

8

+ / -

+ / -

Converter

Figure 2 - Power Supplied over the Data Pins

24

When to install PoE?

Consider the following scenarios:

You’re planning to install the latest VoIP Phone system to minimize cabling l

building costs when your company moves into new ofces next month.

The company staff has been clamoring for a wireless access point in the picnic l
area behind the building so they can work on their laptops through lunch, but
the cost of electrical power to the outside is not affordable.

Management asks for IP Surveillance Cameras and business access systems l
throughout the facility, but they would rather avoid another electrician’s
payment.

References:

IEEE Std 802.3af-2003 (Amendment to IEEE Std 802.3-2002, including IEEE Std

802.3ae-2002), 2003 Page(s):0_1-121

White Paper on Power over Ethernet (IEEE 802.3af)
http://www.poweroverethernet.com/articles.php?article_id=52

Microsemi /PowerDsine
http://www.microsemi.com/PowerDsine/

Linear Tech
http://www.linear.com/

25

5. Troubleshooting

This chapter contains information to help you solve issues. If the Industrial M12
Ethernet Switch is not functioning properly, make sure the Industrial M12 Ethernet
Switch was set up according to instructions in this manual.

The per port LED is not lit

Solution:

Check the cable connection of the Industrial M12 Ethernet Switch.

Performance is bad

Solution:

Check the speed duplex mode of the partner device. The Industrial M12 Ethernet
Switch is run at Auto-negotiation mode and if the partner is set to half duplex,
then the performance will be poor.

Per port LED is lit, but the trafc is irregular

Solution:

Check that the attached device is not set to dedicate full duplex. Some devices use
a physical or software switch to change duplex modes. Auto-negotiation may not
recognize this type of full-duplex setting.

Why the Industrial M12 Ethernet Switch doesn’t connect to the network

Solution:

Check per port LED on the Industrial M12 Ethernet Switch. Try another port on the
Industrial M12 Ethernet Switch Make sure the cable is installed properly Make sure
the cable is the right type Turn off the power. After a while, turn on power again.

26

Appendix A: Networking Connection

A.1 Switch’s RJ-45 Pin Assignments

10/100Mbps, 10/100Base-TX

RJ-45 Connector pin assignment

Contact

MDI Media Dependant

Interface

MDI-X Media Dependant

Interface -Cross

1 Tx + (transmit) Rx + (receive)

2 Tx - (transmit) Rx - (receive)

3 Rx + (receive) Tx + (transmit)

4, 5 Not used

6 Rx - (receive) Tx - (transmit)

7, 8 Not used

A.2 RJ-45 Cable Pin Assignments

RJ-45(8-Pin)

Pinouts for the RJ-45(8-Pin) Port

1 8

MDI MDI-X

Pin

1
2
3
6

Singnal

TX+

TX

-

RX+

RX

-

RX+

RX

-

TX+

TX

-

Pinout 1: TX+

Pinout 2: RX+

Pinout 3: TX

-

Pinout 4: RX -

ISW-800T-M12/ISW-804PT-M12

TX

RX

RX

TX

1

4

2

3

TX+

RX+

TX

-

RX -

1

2

3

4

1

2

3

6

TX+

TX

-

RX+

RX

-

M12(4-Pin, M) to RJ-45(8-Pin) Cross-Over Cable Wiring

Cross-Over Cable Wiring

TX+

RX+

TX

-

RX -

1

2

3

4

1

2

3

6

RX+

RX

-

TX+

TX

-

M12(4-Pin, M) to RJ-45(8-Pin) Straight-Trough Cable Wiring

Straight-through Cable Wiring

27

The standard RJ-45 receptacle/connector

There are 8 wires on a standard UTP/STP cable and each wire is color-coded. The
following shows the pin allocation and color of straight cable and crossover cable
connection:

Straight Cable

SIDE 1

SIDE 1

SIDE 2

SIDE 1

SIDE 2

112233445566778

8

112233445566778

8

SIDE 2

Straight Cable

SIDE 1 SIDE 2

1 = White/Orange
2 = Orange
3 = White/Green
4 = Blue
5 = White/Blue
6 = Green
7 = White/Brown
8 = Brown

1 = White/Orange
2 = Orange
3 = White/Green
4 = Blue
5 = White/Blue
6 = Green
7 = White/Brown
8 = Brown

1 = White/Orange
2 = Orange
3 = White/Green
4 = Blue
5 = White/Blue
6 = Green
7 = White/Brown
8 = Brown

1 = White/Green
2 = Green
3 = White/Orange
4 = Blue
5 = White/Blue
6 = Orange
7 = White/Brown
8 = Brown

Figure A-1: Straight-Through and Crossover Cable

Please make sure your connected cables are with same pin assignment and color
as above picture before deploying the cables into your network.

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