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同时能使用多少个GPIB-USB控制器？
主要软件:
主要软件版本: 2.4
主要软件修正版本: N/A
次要软件: N/A
硬件: Instrument Connectivity Other>>USB>>GPIB-USB-HS, GPIB>>External Controllers/Convertors>>GPIB-USB-B
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问题: 我需要使用多GPIB总线。在一台PC机上我能同时用多少个GPIB-USB-B或GPIB-USB-控制器？
解答:
NI-488.2驱动能同时支持多达100个不同类型的GPIB控制器。
使用多个GPIB-USB-B或GPIB-USB-HS控制器的最大限制在于电脑上的USB控制器所能提供的总功率，特别是笔记本电脑。一个GPIB-USB-B的最大消耗电流是200mA，而一个GPIB-USB-HS的最大消耗电流是500mA。如果电脑的USB控制器不能提供所需电流，可以采用有源USB-hub来提供USB设备所需的额外电流。
相关链接: Products & Services: NI GPIB-USB-HS
Products & Services: NI GPIB-USB-B
KnowledgeBase 22492O8F: Why Will USB-Based Devices Not Run on Bus-Powered Hubs?
KnowledgeBase 0KHBCNRV: Maximum Number of GPIB-ENET and GPIB-ENET/100 Interfaces and Devices Supported by Operating System
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报告日期: 12/13/2005
最近更新: 09/04/2007
文档编号: 3SCIKDIM