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8口集线器（HUB）
Complies with IEEE802.3 10BaseT/2 Ethernet Hub Specifications
Eight RJ-45 ports for UTP Cabling
One BNC port for connection to a 10Base2 segment
Mini and Desktop Size
One uplink port-for cascading Hub to Hub or Hub to Switch, with no Cross-Over Cable
Auto Partition and Reconnection of Bad Ports
Clear Diagnostic LED Indicators for each Port and Entire System
External Power Adapter (7.5VDC/1A) supports Different Power Outlet.Specifications Standards
Complies with IEEE802.3 10Base2 and 10Base-T,Ports/Connector Types
Eight RJ-45 ports and one BNC port .Uplink port support
An uplink port (alternative to port 8X) is used for Hub-to-Hub or Hub-to-Switch connection with no Cross-Over Cable .Connections and Cables
RJ-45 Sockets for use with Category 5 UTP cable .LED Indicators
System: Power, Collision
Port: Link/Activity, Partition
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bjmonsoon 发表于 2007/11/28 14:35:33
TD-1204是一款RS-485集线器（又称RS-485总线分割集中器，RS-485HUB）。是深圳市天地华杰科技有限公司为了解决复杂电磁场环境下RS-485总线大系统中星型布线而专业设计。该RS485集线器采用双向透明传输，RS485集线器它能够把一路RS-485或一路RS-232总线分割为4路RS-485总线，或者把四路RS-485信号汇集到一路RS-485或一路RS-232总线上来。并且每个端口都独立具有光隔、短路、开路保护功能。在系统发生故障的时候，内置的控制器能够及时的切断有故障的端口。使RS485集线器保证每一端口都起到独立工作，达到互不干扰的效果。每个端口可同时连接32个接点，可延长1200米RS-485信号。是改变RS-485总线布线中单一结构的最好选择。2楼 回复本楼
引用 bjmonsoon 2007/11/28 14:35:33 发表于2楼的内容
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