EI Series Hubs
EI Series Hubs Image
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Model: EI Series Hubs
Manufacturer: Contemporary controls
The EI series of Industrial Ethernet Interconnect hubs and links allows for expansion of shared 10Mbps Ethernet networks on the plant floor.
Product Status: Active - Active products are produced on a regular manufacturing schedule and are actively supported products. Active products are not necessarily in stock in the USA. Lead time to ship date for Active products is typically stock to 15 business days ARO.

Stock Status: Call

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.


  • Plug and Play operation
  • Provision for redundant power connections
  • 10BASE-T and 10BASE-FL compliant
  • LEDs for activity, link, collision and power
  • Shielded RJ-45 connectors or ST-style fiber optic connectors
  • Easy panel or DIN-rail installation
  • IEEE 802.3 repeater unit compliant
  • CE Mark
  • Wide-range, low-voltage AC or DC powered
  • UL 508 listed
Contemporary controls EI6-10T/F
Four-port 10BASE-T/two-port fiber Ethernet hub
Contemporary controls EI8-10T
Eight-port 10BASE-T Ethernet hub
Contemporary controls EI5-10T/F
Four-port 10BASE-T/one-port fiber Ethernet hub
Contemporary controls EI4-10T
Four-port 10BASE-T Ethernet hub
Contemporary controls AI-XFMR-E
Wall-mount transformer 220VAC (nom)
Contemporary controls AI-XFMR
Wall-mount transformer (120VAC (nom)
Contemporary controls AI-DIN
DIN-rail mounting kit