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technology enables more bandwidth to be available for good packets when the traffic load is 

greatest.  

To minimize the possibility of dropping frames on congested ports, each PXES6P 

Series Switch dynamically allocates buffer space from 128KB memory pool, ensuring that 

heavily used ports receive very large buffer space for packet storage.  (Many other switches have 

their packet buffer storage space divided evenly across all ports, resulting in a small, fixed 

number of packets to be stored per port.  When the port buffer fills up, dropped packets result.) 

This dynamic buffer allocation provides the capability for the maximum resources of the 

PXES6P Series unit to be applied to all traffic loads, even when the traffic activity is unbalanced 

across the ports.  Since the traffic on an operating network is constantly varying in packet density 

per port and in aggregate density, the PXES6P Series Switches are constantly adapting internally 

to provide maximum network performance with the least dropped packets. 

When the Switch detects that its free buffer queue space is low, the Switch sends 

industry standard (full-duplex only) PAUSE packets out to the devices sending packets to cause 

21 

 

“flow control”. This tells the sending devices to temporarily stop sending traffic, which allows a 

traffic catch-up to occur without dropping packets.  Then, normal packet buffering and 

processing resumes.  This flow-control sequence occurs in a small fraction of a second and is 

transparent to an observer.   

Another feature implemented in PXES6P Series Switches is a collision-based flow-

control mechanism (when operating at half-duplex only). When the Switch detects that its free 

buffer queue space is low, the Switch prevents more frames from entering by forcing a collision 

signal on all receiving half-duplex ports in order to stop incoming traffic. 

The latency (the time the frame spends in the Switch before it is sent along or 

forwarded to its destination) of the PXES6P Series Switches varies with the port-speed types.  

The length of the frame is a variable as it is with all store-and-forward switches.  For 10 Mb-to-

10 Mb, 10 Mb-to-100Mb or 100Mb-to-10 Mb forwarding, the latency is 15 microseconds plus 

the packet time of 10 Mb.  For 100Mb-to-100Mb forwarding, the latency is 5 microseconds plus 

the packet time of 100Mb. 

22 

 

2.4

 

Features and Benefits 

 

„

 

Full 100Mb or 10 Mb switching services for high performance Ethernet  

 

PXES6P Series Switches provide Fast Ethernet switching on all ports.  They 

perform high speed filter/forward operations on the traffic, giving each port’s 

segment a full 100Mb (or 10 Mb) of bandwidth.

  

„

 

Reduces Network Costs and provide economical solution 

PXES6P Series Switches offer the ideal solution to efficiently and inexpensively 

connect a Twisted Pair and fiber network with 10Mb or 100Mb and help to 

expand the Ethernet network in a very convenient and economical way.

  

„

 

Choice of one or two100Mb Fiber option, more efficient 

 Designed as a multi-

purpose media Switch, the 100Mb fiber port allows the user to convert the media 

from copper to fiber and the other RJ-45 port can be used as diagnostic port or 

for more connectivity.

 

„

    Installation is “Plug and Play”, operation is transparent to software 

23 

Содержание PXES6P24V

Страница 1: ...oduced without prior written permission from Eaton Printed in the United States of America 1 Federal Communications Commission Radio Frequency Interference Statement This equipment generates uses and can radiate frequency energy and if not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio communication It has been tested a...

Страница 2: ... PXES6P with 24VDC power input 33 3 6 PXES6P Series 24VDC powered Installation 34 3 7 Connecting Ethernet Media 35 4 3 8 Connecting Twisted Pair RJ 45 CAT 3 or CAT 5 Unshielded or shielded 36 3 8 1 Connecting Fiber Optic ST type twist lock 38 3 8 2 Power Budget Calculations for PXES6P Series Fiber Media 39 3 8 3 Connections to NICs which support Auto Negotiation RJ 45 ports 40 4 0 OPERATION 42 4 1...

Страница 3: ...w to flush the internal address buffer and qualify to use with S Ring and RSTP for faster recovery in ring topology Maximum Ethernet Segment or Domain Lengths 10BASE T Unshielded twisted pair 100 m 328 ft 100BASE TX CAT 5 UTP 100 m 328 ft 100BASE FX half duplex multi mode 412 m 1350 ft 100BASE FX full duplex multi mode 2 km 6 562 ft 100BASE FX half duplex single mode 412 m 1350 ft 100BASE FX full ...

Страница 4: ...tory floor temperature rated Input 6ft AC 3power cord to IEC 320 connector on the 100 240vac 47 63Hz external power adapter Output 12vdc 1 25Amps Direct DC POWER SUPPLY Built in terminal Block for ground along with 24VDC jack 24V DC internal range 10 to 36V DC Power Consumption See Section 3 6 Note 1 the 12V DC jack can be used for dual source DC input using an AC adapter and the DC terminal block...

Страница 5: ...on PXES6P24V1ST 66A2303G01 6 port Ethernet Switch 5 copper 1 fiber ST PXES6P24V2ST 66A2305G01 6 port Ethernet Switch 4 copper 2 fiber ST PXES6P24V 66A2306G01 6 port Ethernet Switch copper only Accessories PXESPS12V 66A2318G01 External AC Power Supply PXESDINRL 66A2319G01 Din rail mount kit PXESTRAY 66A2320G01 Rack mount tray kit 13 2 0 INTRODUCTION This section describes PXES6P Series models inclu...

Страница 6: ...ns and is able to be conveniently DIN rail mounted to suit any application The Power Xpert Ethernet switches include Link Loss Learn LLL feature to qualify for any redundant and self healing managed network structures The Link Loss Feature in PXES6P allows the switches to flush the internal address buffers in milliseconds to permit a quick change in LAN packets flow and pass the reconfiguration si...

Страница 7: ...e as well as a set to indicate duplex for ports 1 and 2 only 10 100 indicates the speed for copper ports whereas F H indicates Full and Half duplex for fiber ports only There is a power PWR LED to indicate that the unit is turned ON The external DC power plug connector and or jack and the internal DC input terminal are provided on the rear of the unit Fig 2 2d shows PXES6P 2ST 19 2 3 Frame Bufferi...

Страница 8: ...e implemented in PXES6P Series Switches is a collision based flow control mechanism when operating at half duplex only When the Switch detects that its free buffer queue space is low the Switch prevents more frames from entering by forcing a collision signal on all receiving half duplex ports in order to stop incoming traffic The latency the time the frame spends in the Switch before it is sent al...

Страница 9: ...P enables monitoring for internal power failure and provides extra reliability to the hardened Switch Link Loss Learn feature for faster recovery in redundant managed network The LLL feature qualifies the switches to actively work along with redundant network structure as a client switch and allow a faster recovery during ring break 25 2 5 Applications for PXES6P Series Switches PXES6P Series Swit...

Страница 10: ...ps for panel mounting The compact and lightweight design of the PXES6P Series allows it to be easily installed 28 in almost any location A Velcro strip may be used for mounting the unit on a vertical surface such as a wall or cabinet or for securing the unit on a table top or shelf Alternatively metal mounting clips and screws are included for a rugged and secure mounting in any orientation Instal...

Страница 11: ...e units are very close together 3 3 DIN rail mounting option The PXES6P Switches designed for use in Industrial Ethernet environments are available for DIN rail mounting A PXES6P is shown alongside the PXESDINRL bracket here The metal DIN rail mounting hardware is optional and needs to be ordered as a separate item e g 31 Model PXESDINRL It comes with four screws to attach the bracket to the unit ...

Страница 12: ...ts max 3 7 PXES6P Series 24VDC powered Installation This section describes the proper connection of the 24VDC leads to the DC power terminal block on the PXES6P Switch as shown in the Figure The DC terminal block on the PXES6P is located on the left side of the unit and is equipped with three 3 screw down lead posts The power terminals are identified as positive and negative and they are floating ...

Страница 13: ...work for both 10 Mbps and 100Mbps be used whenever possible in order to provide flexibility in a mixed speed network since PXES6P Series switch ports are auto sensing for either 10 and 100Mbps Note that the auto cross function does not operate if the port is fixed or not supporting auto negotiation 37 3 8 1 Connecting Twisted Pair RJ 45 CAT 3 or CAT 5 Unshielded or Shielded The following procedure...

Страница 14: ...smitter Power are the parameters necessary to compute the power budget To calculate the power budget of different fiber media installations using PXES6P Switches the following equations should be used OPB Optical Power Budget PT min PR min where PT Transmitter Output Power and PR Receiver Sensitivity Worst case OPB OPB 1dB for LED aging 1dB for insertion loss Worst case distance Worst case OPB in ...

Страница 15: ...te port and will not be sent to the other ports where it is not needed Packets needed for maintaining the operation of the network such as occasional multi cast packets are forwarded to all ports The PXES6P Series Switches operate in the store and forward switching mode which eliminates bad packets and enables peak performance to be achieved when there is heavy traffic on the network Switching Add...

Страница 16: ...LA1 LA2 LA3 LA6 Steady On or steady Off indicates no Receive Activity 10 100 Steady ON for 100Mb speed OFF for 10Mb speed per port copper ports F H FH1 FH2 Steady ON for Full duplex F D mode OFF for Half duplex H D mode per port For fiber port only NOTE Ports 1 and 2 may be assigned as either copper or fiber ports depending upon the model If assigned as a copper port the 10 or 100 designation on L...

Страница 17: ...back to the Installation Section of the applicable chapter of this manual Also check to make sure that the various components of the network are interoperable 2 Check the cables and connectors to ensure that they have been properly connected and the cables wires have not been crimped or in some way impaired during installation About 90 of network downtime can be attributed to wiring and connector ...

Страница 18: ...twork configuration prior to the occurrence of the problem Any changes to system administration procedures should all be noted in this record 5 3 Return Material Authorization RMA Procedure All returns for repair must be accompanied by a Return Material Authorization RMA number To obtain an RMA number please contact customer support at 1 800 356 1243 option 4 Please have the following information ...

Страница 19: ...er shall pay all shipping charges duties and taxes for products returned to Eaton Corporation from another country Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or impro...

Страница 20: ...ll not be liable for any direct indirect special incidental or consequential damages whether based on contract tort or any other legal theory 57 Corporate Headquarters Eaton Electrical Inc 1000 Cherrington Parkway Moon Township PA 15108 Phone 1 800 525 2000 Website http www eatonelectrical com Publication 164201672 ...

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