LB9903A BLACK BOX, LB9903A Datasheet - Page 2

• Manufacturer Part Number: LB9903A
• Description: Ethernet Switch
• Manufacturer: BLACK BOX

Specifications of LB9903A

• Drop Ship: Yes

09/30/2010
#26073
Features
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Thermal design for use in harsh environments
of uncontrolled heat or cold.
Rugged steel cases act as heat sinks.
100-Mbps switching for high-performance
LANs.
Two fiber ports for extended distances.
Autonegotiating on six copper ports per
802.3u standard.
AC or DC power options.
Daisychain units for even greater distance.
Top-mounted LEDs for easy monitoring.
Plug-and-play installation.
724-746-5500
blackbox.com
Daisychain four Hardened Ethernet Switches together over fiber to link traffic data collection
and control stations.
OVERVIEW
industrial applications, whether it’s for heavy manufacturing or
roadside traffic control.
processes themselves won’t adversely affect your network.
The BLACK BOX
you require.
applications, such as for use in roadside control boxes, industrial
plants, mining and military sites, or anywhere adverse weather or
industrial processes can wreak havoc on your expensive circuitry.
and other elements. The plenum-rated switches come packaged in a
metal case and hardware that serves as a heat sink to draw heat away
from the internal electronics and dissipate it. To help with this, each
switch uses only 10 watts of power.
metal shelf, pedestal, or wall. When used in the field, the switches are
typically fastened to a metal pedestal or post planted in the ground.
This provides an even larger heat sink to normalize the operating
temperature of the internal electronics. Although the switches’
packages aren’t waterproof, they can be placed in waterproof metal
enclosures to provide an all-weather outdoor solution.
packaging combined with the high reliability of the design—
Power Units
Traffic
Lights
Ethernet is increasingly being used in ”out-of-the-way” and
But you want to be sure that extreme temperatures and the
They’re designed specifically for unheated and uncooled
Cased in 18-gauge steel, the switches seal out bugs, dirt, smoke,
The switches can be used as standalone units or mounted on a
The ruggedness of the steel case and temperature-control
Switches (LB9901A)
Hardened Ethernet
Control Units
Traffic Light
®
Hardened Ethernet Switches
Cable (EXN0625A), pp. 86–87
Multimode Fiber Optic Bulk
give you the durability
more than 10 years of MTBF!—make for industrial-strength
Ethernet products.
All models have six 10-/100-Mbps RJ-45 ports that autonegotiate
for speed and duplex mode. These ports support twisted-pair copper
segment connections with 10- or 100-Mbps speed per the IEEE
802.2u standard.
cabling, the switches are available with a choice of 100-Mbps fiber
port connectors with multimode or single-mode fiber connectors or
a combination of both. The fiber ports are set to full-duplex mode.
No media converters are required.
traffic to remove faulty packets and minimize traffic congestion while
giving each port’s segment a full 100 Mbps of bandwidth.
ports and has 1-MB packet buffers and a 16K-node address table for
advanced performance
for autosensing AC power or DC power. The latter is ideal for high
reliability and convenience in out-of-the-way locations. We even offer
an AC power supply as a separate item, which you can use as a
backup to your primary AC power input or apply it to the DC model.
Because the AC power source is surge protected, it can withstand
lightning strikes. What’s more, it features a military-style screw-lock
plug for secure connections to the switch.
The switches provide Fast Ethernet switching on all ports.
For extended distance and higher bandwidth through fiber optic
The switches perform high-speed filter/forward operations on the
To achieve high performance, each switch is non-blocking on all
And you’re given a choice of power supplies: standard input
BLACK BOX
®
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