Hubs
Switches
Media
Converters
UL 1604
Industrial
Ethernet U
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Features LIMITED AVAILABILITY |
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Plug
and Play operation |
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Provision for
redundant power connections |
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10BASE-T and 10BASE-FL compliant |
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LEDs for activity,
link, collision and power |
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Shielded
RJ-45 connectors or ST-style fiber optic connectors |
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Easy panel or
DIN-rail installation |
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IEEE
802.3 repeater unit compliant |
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CE Mark |
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Wide-range,
low-voltage AC or DC powered |
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UL
508 listed |
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Product Overview LIMITED AVAILABILITY |
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Need cost-effective, reliable hubs for your network? The virtue
of our hubs is to extend a 10BASE-T system beyond two
nodes or to increase network distances beyond the 100-meter segment limit of the 10BASE-T specification. To maximize distance, the typical network uses twisted-pair
wiring for the end devices and fiber cables for the inter-hub links.
Each twisted pair can be as long as 100 m and the total length of
inter-hub fiber can be as much as 2000 m. The network diameter cannot
exceed 2400 m. In a shared Ethernet environment the length of each
fiber segment depends upon the number of hubs used.
Two EI Series
models provide expansion through twisted-pair cabling — the
four-port EI4-10T and the popular 8-port EI8-10T. The line is enhanced with
its fiber optic versions — the 5-port EI5-10T/F and the six-port EI6-10T/F. The EI6-10T/F has 4 ports for twisted-pair that support
the signaling standards of 10BASE-T and the two fiber ports
support the 10BASE-FL interface using ST connectors. The EI5-10T/F
has one less fiber port.
Fiber optic segments
make it ideal for building control and industrial control applications
where distance and robustness are important. Fiber optic links also
provide a layer of isolation and increased immunity to electrical
noise and other external influences usually encountered in an industrial
environment.
The EI Series
follows the standards for IEEE
802.3 repeater units. These standards include preamble
regeneration with symmetry and amplitude compensation. Repeaters
must retime signals so that jitter, introduced by transceivers and
cabling, does not accumulate over multiple segments. These devices
detect runt packets and collisions and react by generating a Jam
signal. They automatically partition jabbering ports to maintain
network operability.
All hubs provide
digital pre-emphasis to transmitting ports to compensate for the
inherent signal strength roll-off of twisted pair cable. Shielded
RJ-45 connectors accommodate either UTP or STP cabling. The Link
Integrity function is supported — confirming that a functioning
adapter or hub is on the other end of the segment. Hubs can be cascaded
using a crossover cable.
For more accurate
troubleshooting, the EI Series incorporates LED indicators. Besides
one common Collision LED, each port has a pair of LEDs to indicate
link status and port activity.
All units operate
from a wide-range, low-voltage AC or DC power source. Provisions
exist for redundant power connections.
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More Information |
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Ordering Information |
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Hubs |
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Model |
Description |
Quote |
| EI4-10T |
Four-port 10BASE-T repeating hub |
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| EI8-10T |
Eight-port 10BASE-T repeating hub |
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| EI5-10T/F |
Four-port 10BASE-T/one-port fiber 10BASE-FL repeating hub |
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| EI6-10T/F |
Four-port 10BASE-T/two-port fiber 10BASE-FL repeating hub |
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Accessories |
| Model |
Description |
Quote |
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AI-XFMR |
Wall-mount plug-in transformer 120 VAC (nom) input/24 VAC (nom) output
(details...) |
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AI-XFMR-E |
Wall-mount plug-in transformer 230 VAC (nom) input/24 VAC (nom) output
(details...) |
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