NETGEAR Network Card EN516 User Manual

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Package Contents  
Model EN516 hub  
Model EN524 hub  
or  
M
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ELEN516  
ELEN524  
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24  
1
9
8
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0
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Ethernet Hub  
0
M
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Ethernet Hub  
Link/Rx  
Partition  
Link/Rx  
Partition  
Link/Rx  
Partition  
Link/Rx  
Partition  
Link/Rx Partition  
N
ormal/Uplink  
Normal/Uplink  
P
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llisionP  
artition P  
artitio  
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llsonP  
a
rtition P  
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rtitio  
n
16  
13  
17  
24  
Rubber  
footpads  
BNC T-connector  
BNC 50  
terminator  
Rack mount kit  
Power  
cord  
Installation guide,  
Warranty & Owner  
Registration Card  
8668FA  
Verify that your package contains the following:  
Model EN516 hub or Model EN524 hub  
Rack mount kit that includes eight small screws, four large screws, four spacers, and two rack  
mount brackets  
Four rubber footpads  
BNC T-connector and BNC 50 terminator  
Installation guide  
Warranty & Owner Registration Card  
Power cord  
Model EN516/EN524 Ethernet Hub Installation Guide  
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Product Illustration  
The instructions provided in this guide are for installing and using the Model EN516 hub and the  
Model EN524 hub.  
Front Panel of the Model EN516 hub  
Power LED BNC Rx LED  
AUI Rx LED  
vista 10BASE-T  
network ports  
MODELEN516  
8
PORT  
16  
1
10/100Mbps  
Ethernet Hub  
Link/Rx Partition  
Link/Rx Partition  
Normal/Uplink  
Power BNC  
Rx  
AUI  
Rx  
CollisionPartition Partition  
9
16  
Partition LED (for AUI)  
Partition LED (for BNC)  
Collision LED  
Normal/  
Uplink push  
button  
vista 10BASE-T  
network ports  
Power LED BNC Rx LED  
AUI Rx LED  
MODELEN524  
PORT  
24  
1
5
12  
10/100Mbps  
Ethernet Hub  
Link/Rx Partition  
Link/Rx Partition  
Link/Rx Partition  
Normal/Uplink  
Power BNC  
Rx  
AUI  
Rx  
CollisionPartition Partition  
13  
17  
24  
Normal/  
Uplink push  
button  
Partition LED (for AUI)  
Partition LED (for BNC)  
Collision LED  
Front Panel of the Model EN524 hub  
8669FA  
Vista 10BASE-T Network Ports with Built-in LEDs  
The front panel of the Model EN516 hub has 16 RJ-45 10BASE-T ports, and the Model EN524  
hub has 24 RJ-45 10BASE-T ports. Two LEDs—the Link/Rx LED and the Partition LED—are  
built into each 10BASE-T port on both models.  
Link/Rx Partition  
LED  
LED  
8670EA  
Model EN516/EN524 Ethernet Hub Installation Guide  
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LEDs  
The table below describes the activity of the LEDs.  
Label  
Color Activity Description  
Power  
Green On  
Power is supplied to the hub.  
Collision  
Amber Blinking Data collision is occurring on the network. Note that  
occasional collisions are normal.  
BNC Rx  
Green Blinking There is incoming data on the BNC port.  
Partition  
(for BNC)  
Amber On  
The BNC port is partitioned because of excessive  
collisions or the BNC port is not connected.  
AUI Rx  
Green Blinking There is incoming data on the AUI port.  
Partition  
(for AUI)  
Amber On  
The AUI port is partitioned because of excessive  
collisions or because the signal quality error (SQE) test  
function is not disabled on the transceiver.  
Link/Rx  
Green On  
The link between this port and the connected device is  
good.  
(located on the top left  
corner of each vista  
10BASE-T port)  
Blinking There is incoming data on the port.  
Amber On The port is partitioned because of excessive collisions.  
Partition  
(located on the top  
right corner of each  
vista 10BASE-T port)  
Normal/Uplink Push Button  
The Normal/Uplink push button allows you to select Normal (MDI-X) for direct PC connection.  
The push button also allows you to select Uplink (MDI) wiring for connection to a hub or a switch  
for port 16 on the Model EN516 hub and for port 24 on the Model EN524 hub. This uplink  
configuration eliminates the need to use a crossover cable. Ports 1 through 15 on the Model  
EN516 hub and ports 1 through 23 on the Model EN524 hub are permanently configured for  
normal wiring for connection to a PC.  
Rear Panel  
The rear panel of each hub has two ports: the AUI port and the BNC port. You can use the AUI  
port with the appropriate transceiver to connect the hub to a backbone network using thin coaxial  
cable, thick coaxial cable, fiber optic cable, or 10BASE-T wiring. You can use the BNC port to  
connect to a backbone network or other PCs using thin coaxial cable. The rear panel also includes  
an AC power receptacle. The hub accepts between 100 and 240 V AC, 50/60 Hz.  
AUI port  
BNC port  
Power receptacle  
BNC  
AUI  
100-240 VAC 50-60 Hz 0.2A  
8143FA  
Model EN516/EN524 Ethernet Hub Installation Guide  
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Installation Procedures  
Prepare the Site  
Before you begin installing your hub, prepare the installation site. Make sure your operating  
environment meets the operating environment requirements of the equipment.  
Characteristic  
Requirement  
Temperature  
Ambient temperature between 0° and 40° C (32° and 104° F).  
No nearby heat sources such as direct sunlight, warm air exhausts, or  
heaters.  
Operating humidity  
Ventilation  
Maximum relative humidity of 90%, noncondensing.  
Minimum 2 inches (5.08 cm) on all sides for cooling.  
Adequate airflow in room or wiring closet.  
Operating conditions  
Service access  
At least 6 feet (1.83 m) to nearest source of electromagnetic noise (such  
as photocopy machine or arc welder).  
Minimum 12 inches (19.68 cm) front and back for service access and  
maintenance.  
Front and back clearance for cables and wiring hardware such as  
punchdown blocks.  
Power  
Adequate power source within 6 feet (1.83 m).  
Tabletop requirements Flat area approximately 13 inches (33.0 cm) by 8 inches (20.3 cm).  
Rack requirements  
Standard 19-inch (48.26 cm) EIA equipment rack, with supplied mounting  
bracket hardware; 1.0 EIA rack-mount spaces needed for each  
NETGEAR hub.  
Wiring hardware  
Wiring hardware, such as punchdown blocks or patch panels, should be  
complete before installing the hub.  
Model EN516/EN524 Ethernet Hub Installation Guide  
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Install the Hub  
2
To install your hub on a flat surface, you do not need any special tools. Install the rubber footpads  
that are included in the package. Be sure the hub is positioned with at least 2 inches of space on all  
sides for ventilation.  
To install the hub in a rack, you need two Phillips screwdrivers: one size for the screws that attach  
the brackets to the hub and another size for the screws that attach the brackets to the mounting  
rack. Be sure to choose a location that is near the devices to be connected, is close to an electrical  
outlet, and provides at least 2 inches of space all around the hub for ventilation.  
1
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RX  
13  
L
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RX  
17  
12  
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k
RX  
N
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a
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p
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24  
(Model EN524 hub shown)  
8666FA  
Connect a PC to the Hub  
You can connect PCs, Apple Macintosh computers, UNIX workstations, or any device equipped  
with a 10BASE-T Ethernet interface to the RJ-45 ports on your hub by using twisted pair Ethernet  
cables.  
To connect any of the RJ-45 ports on your hub to a PC, use a regular straight-through UTP cable.  
If you are connecting using port 16 on the Model EN516 hub or port 24 on the Model EN524 hub,  
set the Normal/Uplink push button to Normal.  
(Model EN524 hub shown)  
1
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RX  
13  
L
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RX  
17  
12  
L
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k
RX  
N
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a
l/U  
p
lin  
k
8667FA  
Note: Ethernet specifications limit the cable length between your PC or server and the  
hub to 328 feet (100 meters) in length.  
Model EN516/EN524 Ethernet Hub Installation Guide  
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Connect the Hub to a Network  
Cascading refers to connecting hubs together to increase the number of ports or the number of  
users supported on the network. The 10BASE-T, BNC, or AUI ports can be used to cascade hubs  
together.  
Connect to a Network Using the 10BASE-T Ports  
The twisted pair cable extended from a 10BASE-T port (or UTP port) is called a twisted pair  
segment and can be up to 100 meters (m) in length. The 10BASE-T ports, with the exception of  
port 16 on the Model EN516 hub and port 24 on the Model EN524 hub, are MDI-X (or Normal)  
ports. Use the following table as a guide for selecting the appropriate network cable.  
Connecting Port  
on the Hub  
Connecting Device  
Cable Used  
Model EN516 hub:  
Ports 1–15  
PC, server, or router  
Hub or switch  
Straight-through cable  
Crossover cable  
Ports 1–15  
Model EN524 hub:  
Ports 1–23  
PC, server, or router  
Hub or switch  
Straight-through cable  
Crossover cable  
Ports 1–23  
Set the Normal/Uplink Push Button  
If you are connecting to port 16 on the Model EN516 hub or to port 24 on the Model EN524 hub,  
use the following table. Determine the type of cable to use and how to set the Normal/Uplink push  
button for either port 16 or port 24.  
Connecting Port  
Connecting Device  
Cable Used  
Port 16 or port 24 set to Normal  
Port 16 or port 24 set to Uplink  
PC, server, or router  
Hub or switch  
Straight-through cable  
Straight-through cable  
Model EN516/EN524 Ethernet Hub Installation Guide  
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You can cascade hubs together through any of the ports. The following illustration shows  
cascading hubs together in a hierarchical star through the 10BASE-T ports and indicates the  
setting of the Normal/Uplink push button on each hub.  
Normal  
Model EN524 hub  
1
Uplink  
Uplink  
Model EN516 hub  
Model EN524 hub  
M
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ELEN516  
2
3
P
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T
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16  
1
8
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Ethernet Hub  
L
ink/R  
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ink/R  
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artitio  
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9
16  
Uplink  
Uplink  
Model EN524 hub  
Model EN516 hub  
M
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ELEN516  
4
5
P
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0/1  
T
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16  
1
0
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Ethernet Hub  
L
ink/R  
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ink/R  
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p
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artitio  
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9
16  
A
B
8664FA  
Note: Ethernet specifications limit the number of hubs with twisted pair links in any  
communication path to five, as shown in the example. When PC “A” communicates  
with PC “B,” the communication path goes from hub 4 to hub 2, to hub 1, to hub 3,  
and then to hub 5 (or five paths).  
The following illustration shows cascading hubs together daisy-chain style and indicates the  
setting of the Normal/Uplink push button on each hub.  
Model EN516 hub  
M
O
D
ELEN516  
P
O
1
R
0/1  
T
0
16  
1
9
8
0
M
b
p
s
Ethernet Hub  
Link/Rx  
Partition  
Link/Rx Partition  
N
ormal/Uplink  
P
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B
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A
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llisionP  
artition P  
artitio  
n
16  
Normal  
Uplink  
Model EN524 hub  
Model EN524 hub  
Uplink  
8665FA  
Model EN516/EN524 Ethernet Hub Installation Guide  
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Connect to a Network Using the BNC Port  
The BNC port on the rear panel of the hub is used for connecting to a thin coaxial segment. You  
can connect other Model EN516 or Model EN524 hubs, servers, workstations, or other devices to  
the BNC port. A BNC-T connector is inserted in the port, and the 50 terminator terminates the  
connection at each end device. By using the BNC port for cascading, you treat each connected hub  
as just another node on the coaxial segment.  
The separation marks in the coaxial cable between the hubs in this illustration represent the  
incorporation of other devices and show that interconnection is not limited to hubs.  
BNC T- connector  
BNC 50 terminator  
BNC 50 terminator  
8074FA  
Note: Ethernet specifications limit a BNC segment to 30 BNC connections, specify a  
minimum of 1.64 feet (0.5 m) between any two stations, and limit segments to 607 feet  
(185 m) in length.  
Model EN516/EN524 Ethernet Hub Installation Guide  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Connect to a Network Using the AUI Port  
The AUI port on the rear panel of the hub is normally used for connecting a thick coaxial segment.  
With the right type of transceiver, you can use the AUI port to connect to most types of network  
media, including 10BASE-T twisted pair cable or thin coaxial, thick coaxial, and 10BASE-FL  
fiber optic cables.  
Note: All transceivers connected to the AUI port must have the signal quality error  
(SQE) test function disabled. Refer to your transceiver documentation for information  
about disabling the SQE test function.  
Cable terminator device  
AUI cable  
Thick  
coaxial  
cable  
10BASE-5  
transceiver  
8075FA  
Note: Ethernet specifications limit segments to 100 stations and 1,640 feet (500 m) in  
length, and they specify that the AUI cable between the hub and the transceiver is  
limited to 164 feet (50 m).  
Verify the Installation  
To complete the installation, connect the power cord first to the power receptacle on the hub rear  
panel and then to the power outlet on the wall. When power has been applied to the hub:  
The green Power LED on the front panel is on.  
The green Link/Rx LED on each connected port is on.  
If there are any problems, refer to “Troubleshooting Information.”  
Model EN516/EN524 Ethernet Hub Installation Guide  
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Troubleshooting Information  
Refer to this table and the information that follows the table to troubleshoot your Model EN516 or  
Model EN524 hub.  
Symptom  
Cause  
Solution  
Amber Collision  
LED blinks.  
Data collision is  
normal on Ethernet  
networks.  
No action is required.  
Amber Collision  
LED blinks  
There is data  
collision on the  
Make sure connected devices are operating in half-  
duplex mode. The hub is not compatible with devices  
excessively.  
network because the that operate in full-duplex mode.  
network is extremely If you suspect that there might be a defective device on  
busy or defective  
devices are  
the network, disconnect devices one at a time to isolate  
the defective unit on the network.  
connected on the  
network that cannot  
If the network is extremely busy, you may have to  
segment the network with an Ethernet switch such as a  
detect network traffic NETGEAR Ethernet switch or to upgrade your network  
or collision.  
to Fast Ethernet operation.  
Wrong or miswired  
cables are used.  
Make sure the correct UTP cables are used. See the  
table in the installation section of this guide for cable  
use and Normal/Uplink push button information. Note  
that home telephone cables can cause a collision  
condition and cannot be used in place of UTP cables.  
Green Link/Rx  
LED on the  
10BASE-T port is successful link or  
off when a cable data transmission.  
is attached or not  
The port is not  
detecting a  
Check for a bad cable, cable pairs that are not correctly  
wired, or loose connectors. Make sure that there is  
power to both the hub and the Ethernet transceiver on  
the connected device. Make sure the port has not been  
partitioned.  
blinking when  
there is data  
transmission.  
Amber Partition  
LED on the  
The connected port  
is partitioned  
The 10BASE-T port, BNC port, or AUI port is  
partitioned after 32 consecutive collisions are detected.  
10BASE-T port,  
because of excessive When the first good packet without a collision is  
BNC port, or AUI collisions.  
port turns on.  
received, the port is reconnected and the amber  
Partition LED turns off. Check and correct causes listed  
in this table for excessive collisions. Make sure that:  
The correct cable is used and the cable is not faulty.  
There are no faulty connectors.  
The network card in your PC is set to half-duplex.  
If the amber Partition LED on the BNC port turns on,  
also make sure that:  
Each segment is terminated with a BNC 50 Ω  
terminator at both ends. Note that if the BNC port is  
not in use and the amber Partition LED turns on  
(which could happen), no action is required.  
If the amber Partition LED on the AUI port turns on,  
also make sure that:  
The coaxial transceiver is functioning properly, the  
coaxial segment is terminated properly, and the  
segment is not disconnected along the cable  
length.  
The signal quality error (SQE) test on the  
transceiver is disabled. Refer to your transceiver  
documentation for instructions.  
Model EN516/EN524 Ethernet Hub Installation Guide  
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Cable Connector Information  
Network Interface Cards  
Make sure the network interface cards installed in the workstations are in working condition and  
the software driver has been installed.  
Hub Integrity  
If required, verify the integrity of the hub by resetting it. Turn power to the switch off and then  
back on. If the problem continues and you have completed all the preceding diagnoses, contact  
NETGEAR Customer Support. For the phone number of the representative in your area, see  
“Customer Support.”  
Twisted Pair Cables  
For two devices to communicate, the transmitter of each device must be connected to the receiver  
of the other device. The crossover function is usually implemented in- ternally as part of the  
circuitry in the device. Most ports on switches and repeaters have media-dependent inter- faces  
with crossover ports. These ports are referred to as MDI-X or Normal ports. Computer and  
workstation adapter cards are usually media-  
dependent interface ports referred to as MDI or Uplink ports.  
The figures illustrate the use of straight-through and crossover twisted pair cables.  
Straight-through  
twisted pair cable  
Uplink or  
MDI port  
Normal or  
MDI-X port  
1
2
1
2
Tx  
Rx  
Rx  
Tx  
3
3
6
6
Normal or  
MDI-X port  
Normal or  
MDI-X port  
Crossover  
twisted pair cable  
1
1
Rx  
2
Rx  
2
3
3
Tx  
6
Tx  
6
8146EB  
Model EN516/EN524 Ethernet Hub Installation Guide  
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RJ-45 Connector  
The RJ-45 connector (shown in the illustration with an RJ-45 plug) is used to connect  
workstations, hubs, and switches through unshielded twisted pair cable. The RJ-45 connector  
accepts four-pair Category 3 or Category 5 UTP cable. Only two pairs are used for 10BASE-T  
wiring.  
12345678  
8
1
711EA  
Normal Assignment:  
Ports 1–15 on the  
Uplink Assignment:  
Port 16 on the  
Model EN516 hub  
RJ-45 Connector Ports 1–23 on the  
Pin Assignment Model EN524 hub  
Model EN516 hub  
Port 24 on the  
Model EN524 hub  
1
Input Receive Data +  
Input Receive Data -  
Output Transmit Data +  
Output Transmit Data -  
Not used  
Output Transmit Data +  
Output Transmit Data -  
Input Receive Data +  
Input Receive Data -  
Not used  
2
3
6
4, 5, 7, 8  
AUI Connector  
The AUI connector for the hub connects the hub through an external transceiver to other devices.  
An inter-repeater fiber link using a 10BASE-F transceiver is an example of such an application.  
AUI connector  
1
8
15  
9
8148EA  
AUI Connector Pin Assignment  
Signal  
1, 4, 11, 14, 15  
Ground  
CI-A  
2
3
DO-A  
DI-A  
5
6
+ 12 V DC return  
7, 8  
9
Not used  
CI-B  
10  
12  
13  
DO-B  
DI-B  
+ 12 V DC (500 mA maximum)  
Model EN516/EN524 Ethernet Hub Installation Guide  
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BNC Connector  
The BNC connector for the hub supports 10 Mbps data transmission and connects the hub to other  
devices.  
BNC connector  
Center conductor  
Ground shield  
1
2
8149EA  
The BNC port on the hub, with the BNC T-connector and the 50 terminator, is used for  
connecting to a thin coaxial segment.  
BNC T-connector  
50 terminator  
50  
OHM  
8150FA  
Model EN516/EN524 Ethernet Hub Installation Guide  
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Technical Specifications  
General Specifications  
Network Protocol and Standards Compatibility  
IEEE 802.3i, 10BASE-T,  
10BASE-2, 10BASE-5 Ethernet  
Data Rate  
Interface  
10 Mbps, Manchester encoded  
16 10BASE-T ports (RJ-45) on the Model EN516 hub  
24 10BASE-T ports (RJ-45) on the Model EN524 hub  
On both the Model EN516 and Model EN524 hubs:  
1 BNC 10BASE-2 port  
1 AUI port (15-pin D-type)  
Power  
100–240 V, 50/60 Hz,  
(auto selection)  
0.15 A maximum  
Physical Specifications  
Width:  
13.0 inches (330 mm)  
1.7 inches (43 mm)  
8.0 inches (203 mm)  
Height:  
Depth:  
Weight:  
Model EN516 hub  
Model EN524 hub  
Environmental Specifications  
Operating temperature:  
Operating humidity:  
Electromagnetic Emissions  
CE mark, commercial  
FCC Part 15 Class A  
EN 55 022 (CISPR 22), Class A  
VCCI Class 1 ITE  
4.8 lb (2.2 kg)  
5.0 lb (2.3 kg)  
0° to 40° C (32° to 104° F)  
90% maximum relative humidity, noncondensing  
Electromagnetic Susceptibility  
CE mark, commercial  
IEC 801-2, Level 2/3/4  
IEC 801-3, Level 2  
IEC 801-4, Level 2  
IEC 801-5, Level 2  
Electrostatic discharge (ESD):  
Radiated electromagnetic field:  
Electrical fast transient/burst:  
Electrical surge:  
Safety Agency Approvals  
CE mark, commercial  
UL listed (UL 1950)  
CSA certified (CSA 22.2 #950)  
TUV licensed (EN 60 950)  
Model EN516/EN524 Ethernet Hub Installation Guide  
Download from Www.Somanuals.com. All Manuals Search And Download.  
© 1998 by NETGEAR, Inc. All rights reserved.  
Trademarks  
Bay Networks is a registered trademark of Bay Networks, Inc. NETGEAR is a trademark of Bay Networks, Inc.  
All other trademarks and registered trademarks are the property of their respective owners.  
Statement of Conditions  
In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to make changes to the products  
described in this document without notice.  
NETGEAR does not assume any liability that may occur due to the use or application of the product(s) or circuit layout(s) described herein.  
Certificate of the Manufacturer/Importer  
It is hereby certified that the Model EN516 and Model EN524 Ethernet hubs have been suppressed in accordance with the conditions set out in the  
BMPT-AmtsblVfg 243/1991 and Vfg 46/1992. The operation of some equipment (for example, test transmitters) in accordance with the regulations  
may, however, be subject to certain restrictions. Please refer to the notes in the operating instructions.  
Federal Office for Telecommunications Approvals has been notified of the placing of this equipment on the market and has been granted the right  
to test the series for compliance with the regulations.  
Voluntary Control Council for Interference (VCCI) Statement  
This equipment is in the first category (information equipment to be used in commercial and/or industrial areas) and conforms to the standards set  
by the Voluntary Control Council for Interference by Data Processing Equipment and Electronic Office Machines that are aimed at preventing radio  
interference in commercial and/or industrial areas.  
Consequently, when this equipment is used in a residential area or in an adjacent area thereto, radio interference may be caused to equipment such  
as radios and TV receivers.  
Federal Communications Commission (FCC) Compliance Notice: Radio Frequency Notice  
Note: 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. If it is not installed and used in accordance with the instruction manual, it  
may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference,  
in which case users will be required to take whatever measures may be necessary to correct the interference at their own expense.  
EN 55 022 Statement  
This is to certify that the Model EN516 and Model EN524 Ethernet hubs are shielded against the generation of radio interference in accordance  
with the application of Council Directive 89/336/EEC, Article 4a. Conformity is declared by the application of EN 55 022 Class A (CISPR 22).  
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 appropriate measures.  
Canadian Department of Communications Radio Interference Regulations  
This digital apparatus (Model EN516 and Model EN524 Ethernet hubs) do not exceed the Class A limits for radio-noise emissions from digital  
apparatus as set out in the Radio Interference Regulations of the Canadian Department of Communications.  
Règlement sur le brouillage radioélectrique du ministère des Communications  
Cet appareil numérique (Model EN516 et Model EN524 Ethernet hubs) respecte les limites de bruits radioélectriques visant les appareils  
numériques de classe A prescrites dans le Règlement sur le brouillage radioélectrique du ministère des Communications du Canada.  
Model EN516/EN524 Ethernet Hub Installation Guide  
Download from Www.Somanuals.com. All Manuals Search And Download.  
NETGEAR, Inc.  
A Bay Networks Company  
4401 Great America Parkway  
Santa Clara, CA 95054 USA  
Phone: 888-NETGEAR  
Customer Support  
Phone  
Australia: 1800-142-046  
France: 0800-90-2078  
Germany: 0130-817305  
Japan: 0120-66-5402  
Korea: 00308-11-0319  
New Zealand: 0800-444-626  
Sweden: 020-790086  
United Kingdom: (44) 171-571-5120  
U.S./Canada: 800-211-2069  
Internet/World Wide Web  
Defective or damaged merchandise can be returned to your point-of-sale  
representative.  
*M-EN500NA-0*  
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