推荐回答(1个)
现在很多电子产品都有那种电源适配器,请问这个电源适配器需要分正负极吗?
这个我们交变压器
输入 AC 220V
我猜你买的 输出 应该是 DC 12V
AC是交流电 分零线火线 不分正负
而你接 变压器的 输出端 DC的直流电 是分 正负的
监控摄像头上的那个插入电源的插孔你怎么区分正负极?
正极就是插孔里面 负极就是表面·
你直接插入即可· 电源适配器和 这个 摄像头的 接口是对应正负极的·
一般我们安装的时候会把这个插头剪开 直接接线·所以店长会提醒你需要注意正负极
一头是插头插入插座,一头是圆柱插头插入摄像头,你怎么能知道哪个是正极哪个是负极?
同上 插头插入插座 这个是交流220V输入 你怎么插 圆柱插头的正负极都不变
圆柱插头 你用万用表红色插入圆柱插头内部 黑色搭在外壳即可测量出电压 数字表会显示正负
下次你把插入插座的插头反过来插入插座,正负不又不一样了吗?
DC直流输出的正负不会改变?
不可能每次插入插座都要用仪器测量一下吧?
当然不用
最后建议 直接将圆柱插头插入摄像机对应的圆柱插头 即可·
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