問題：
KUSB-3100 Series maximum cable length
答案：
Product(s):USB Modules: KUSB-3100 Series
Question:What is the maximum cable length that can be used with the KUSB-31xx modules?
Answer:With the KUSB-31xx modules, the maximum cable length is 5 meters to one powered hub.So for example if you needed 15 meters, you would need to use 3 powered hubs each connected via a 5 meter length cable.The maximum distance would be about 15 meters because anything longer would exceed the prop delay of the 12Mhz clock that the module must be synchronized to.
Copyright 2003, Keithley Instruments, Inc.
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