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Dear Tuan Nguyen This is SungWoon Lee with Support Team. Unfortunately, we have no idea related "IVS Control System Main Board (Rev 1.2)". So I am afraid I don'st know what 4CH LED is indicated. Currently, all I can tell you is that EZL-50L should be powered by 5V source. I guess that one of our customers designed this system. So I would like you to contact directly to this customer for Thank you. > Tuan Nguyen wrote: > ------------------------------------ > Hello, Mr. > > Now i have a system, include: "Computer -> Hub -> Control Box( EZL-50L, EZL-410) -> 3 pumps". > > My computer cannot control 3 pumps. > > Pump, Hub, Computer is OK. > > I'sve checked Control Box, voltage was 3.3v to provide EZL50L, EZL-410, but cannot connect and ping to EZL50L, EZL-410L follow User Manual of them. Cable is OK, IP address of My computer is 10.1.0.2. > > When Turn ON the Control Box, the led of 4CH flashed. Maybe EZL-50L and EZL-410 has fail???? > > Can you help me about this problem? I'sve sent picture follow this item. > Thank you.
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