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解决光端机的开关量问题
由业界具有权威性的广州银讯为大家说说 解决光端机的开关量问题。光端机开关量问题是光端机的常见问题之一，对监控效果有比较大的影响。那么pg电子官网 应该如何解决光端机的开关量问题呢？下面由小编做一些简单的介绍：开关量信号是TTL电平的脉冲串，它能控制警灯、警铃、继电器…
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