Contemporary Control Systems AI Active Hubs - Manual (Page 6)

TD675100-0M
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Active hubs increase the robustness of ARCNET networks.
They maximize the distance that can be achieved on each cable
segment—up to 2000 feet on coaxial segments. They prevent
interference to the network by squelching reflections caused by
open or shorted cable segments attached to the hub. Unused hub
ports need not be terminated. Active hubs allow for a distributed
star topology, thereby minimizing the cabling required in a
plant. Active links and repeaters provide extensions to bus
systems or bridging to other cable media.
1.2 Features
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Compatible with the baseband ARCNET network
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Compatible with all CC’s network interface modules
(NIMs) and active hubs
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Supports either 2 or 3 ports
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Panel-mount enclosure
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Configurations available for either link, repeater or hub
operation
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Supports coaxial, twisted-pair and fiber optic cable
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LED indicator identifies reconfiguration of the network
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Minimizes bit jitter with precision delay line timing
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Watchdog timer prevents hub lockup
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Hub unlatch delay digitally controlled
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Low voltage AC or DC powered
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Provisions for redundant power supplies
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Supports variable data rates from 78 kbps to 10 Mbps
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Accommodates AC or DC coupled EIA-485 networks