FANUC A350-2001-T934/01
通常在接收端放置瞬态保护器。用短而粗的线(长度小于5倍宽度,小于3倍宽度)连接到机箱地。从连接器出来的信号线和地线要直接接到瞬态保护器,然后才能接电路的其他部分。
*在连接器处或者离接收电路25mm的范围内,要放置滤波电容。
(1)用短而粗的线连接到机箱地或者接收电路地(长度小于5倍宽度,小于3倍宽度)。
(2)信号线和地线先连接到电容再连接到接收电路。
*要确保信号线尽可能短。
*信号线的长度大于300mm时,一定要平行布一条地线。
*确保信号线和相应回路之间的环路面积尽可能小。对于长信号线每隔几厘米便要调换信号线和地线的位置来减小环路面积。
*从网络的中心位置驱动信号进入多个接收电路。
*确保电源和地之间的环路面积尽可能小,在靠近集成电路芯片每一个电源管脚的地方放置一个高频电容。
*在距离每一个连接器80mm范围以内放置一个高频旁路电容。
*在可能的情况下,要用地填充未使用的区域,每隔60mm距离将所有层的填充地连接起来。
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