RELIANCE WR-D4005江南网页官方网站app下载控制卡件
1.产 品 资 料 介 绍：
中文资料：
RELIANCE WR-D4005可以包括最多七个串行扩展和/或远程背板的组合。扩展背板可以是前面列出的任何RX3i或RELIANCE WR-D4005型号。远程背板可以是《RELIANCE WR-D4005输入/输出模块规格手册》（GEK-0898）中列出的任何RELIANCEWR-D4005.远程背板。▪ 如果系统仅包括扩展背板，则从CPU到最后一个背板的总距离不能超过15米（50英尺）▪ 如果系统包括任何远程背板，则从CPU到最后一个背板的总距离不能超过213米（700英尺）。
远程背板在更远的距离上提供与扩展背板相同的功能。远程背板具有额外的隔离电路，可以减少不平衡接地条件的影响，当背板彼此相距很远且不共享同一接地系统时，可能会出现这种情况
CPU和远程背板之间的通信可能比CPU和扩展背板之间的通讯花费的时间稍长。与总的CPU扫描时间相比，这种延迟通常很小。
英文资料：
The RELIANCE WR-D4005 can include a combination of up to seven Serial Expansion and/or Remote Backplanes. The Expansion Backplanes can be any of the RX3i or RELIANCE WR-D4005 models listed earlier. The Remote Backplanes can be any of the RELIANCE WR-D4005 Remote Backplanes listed in the RELIANCE WR-D4005 I/O Module Specifications Manual, GEK-0898. ▪ If the system includes only Expansion Backplanes, the total distance from the CPU to the last backplane cannot be more than 15 meters (50 feet) ▪ If the system includes any Remote Backplanes, the total distance from the CPU to the last backplane cannot be more than 213 meters (700 feet).
Remote Backplanes provide the same functionality as Expansion Backplanes over a much greater distance. Remote Backplanes have extra isolation circuitry that lessens the effect of unbalanced ground conditions that can occur when backplanes are located long distances from each other and do not share the same ground system
Communications between the CPU and a Remote Backplane may take slightly longer than communications between the CPU and an Expansion Backplane. This delay is usually small compared to the total CPU scan time.
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