The EISM5-100T and all models of the EIS Series of Industrial Ethernet switching hubs qualify for use in Class I, Division 2 hazardous locations (Groups A, B, C, D). The EIS8-100T provides eight twisted-pair ports that use shielded RJ-45 connectors.
For industrial applications requiring a fiber backbone, the EIS6-100T/FT has ST connectors.
Switching hubs segment the Ethernet network into separate collision domains. Each functions as a "bridge" between 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-) 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 approach is automatically invoked. Table port locations of Ethernet devices are aged to automatically accommodate changes to the field wiring. If a broadcast, multicast or unicast transmission to an unknown destination is received on a port, all other ports are flooded with the transmission.
All models feature wide-range, low-voltage AC or DC power requirements and broadcast storm protection (which is jumper-selectable in the EIS Series). EIS models can be DIN-rail or panel mounted while the EISM5-100T mounts only on DIN-rail. To aid troubleshooting, each device provides LED indicators for data rate, activity, link integrity and power. Each EIS unit also offers an LED indicator for loop detection.