EISW16-100T
Plug and Play Switching Hub for Automation Systems
Installation Guide
The EISW16-100T 16-port switching hub is designed for networked automation appli-
cations. Like all Ethernet switches from Contemporary Controls, it features non-block-
ing (full wire-speed) operation. It divides an Ethernet network into sixteen collision
domains—“bridging” data links to create larger network diameters than possible with
repeating hubs. Each port automatically negotiates its data rate to either 10 Mbps or
100 Mbps—controlling data flow with the PAUSE function in full-duplex links or with the
backpressure method in half-duplex links.
The switch provides preamble regeneration with symmetry and amplitude compensation,
retiming signals to eliminate jitter. Digital pre-emphasis compensates for inherent signal
strength roll-off. Link integrity is monitored, verifying that a working adapter or hub is on
the distant end of a segment.
Port assignments are learned by reading Ethernet frames and logging the source
addresses to a table. Throughput is improved by restricting traffic to those ports party to a
data exchange while other data is simultaneously exchanged on other ports. Store-and-
forward operation is implemented, and broadcast, multicast, or unicast transmissions are
received by all ports.
The EISW16-100T has sixteen Auto-MDIX ports for attaching local devices. Each port has
a LNK/ACT LED that glows green with an established link and flashes with activity. Each
port also has speed LED that glows amber for 100Mbps.
The unit features dual power inputs with wide-ranging voltages (12-48V DC or 24V AC).
For power redundancy, two DC supplies can be used. A normally open (NO) fault relay
contact held closed, opens upon a P1 or P2 power failure. This contact is rated up to
24V DC at 1A. A wide operating temperature range of –40°C to +75°C make the EISW16
suitable for outdoor applications.
