Features

Plug and Play operation Miniature Size 10BASE-T / 100BASE-TX compliant Shielded RJ-45 connectors Auto-negotiated data rate, duplex and flow control Full or half-duplex Built-in uplink provisions

Wide-range, low-voltage AC or DC powered Provision for redundant power connections LEDs for activity/link, collision and power Easy DIN-rail installation Industrial environment EMC CE Mark UL 508 and UL 1604 Class I, Division 2 Listed

Product Overview

The EISM miniature switching hub is designed to be used where space is at a premium because of shrinking panels and the space restrictions of small machines.

The EISM5-100T is designated as a 5-port miniature switching hub. One port has an extra socket allowing it to be used as an uplink port to connect two switches together, thereby eliminating the need for a crossover cable. This unit is similar in function and capabilities to its EIS8-100T counterpart. It divides the Ethernet network into as many as five separate collision domains. It terminates the collision domain at each port. It functions as a "bridge" between these various data links — creating a larger network diameter than can be achieved with repeating hubs. Each port automatically negotiates with its attached device the data rate (10 or 100 Mbps) and duplex (full- or half-duplex) for that port. The flow control mechanism is also negotiated. For full-duplex segments, the PAUSE scheme is used. For half-duplex segments, the backpressure method is automatically invoked.

The switch learns the port locations of Ethernet devices by reading complete Ethernet frames and observing source addresses. A table of source addresses and corresponding port assignments is created and maintained. From that time on, traffic is restricted to only those ports involved in a transmission. This allows enhanced throughput since simultaneous transmissions can now be initiated on those ports without activity. Also, table values are aged to automatically accommodate changes to the field wiring. If a unicast transmission to an unknown destination is received on a port, all other ports are flooded with the transmission. This is also true of broadcast or multicast transmissions.

Link integrity is monitored, verifying that a working adapter or hub is on the distant end of a segment. To aid troubleshooting, each port LED glows solid if a link exists, flashes to show activity and shows data rate by color: green for 100 Mbps and yellow for 10 Mbps. One green power LED is provided.

Other features include wide-range, low-voltage AC or DC power requirements. Provisions exist for redundant power connections. The unit mounts on TS-32 or TS-35 DIN-rail, making it simple to install into industrial control panels.

Ordering Information

Model	Description	Purchase
EISM5-100T	Five-port 10BASE-T/100BASE-TX miniature switching hub
Accessories
Model	Description	Purchase
AI-XFMR	Wall-mount plug-in transformer 120 VAC (nom) input/24 VAC (nom) output (details...)
AI-XFMR-E	Wall-mount plug-in transformer 230 VAC (nom) input/24 VAC (nom) output (details...)