Mainboard for inverter modularzed units
1.Power supply: AC220+15%;
2.0perating Temperature Range: -30'C~70°C
3.Humidity Requirements for 50/60Hz
Controller Usage:
4.Storage temperature range :
-30°C~70°C
5.Digital Output: 16 channels;
6.Digital Input: 14 channels;
7.Analog Output: 4 channels 0-10V output
8.Analog Input: 26 channels (2 channels 0-10V input, 2
channels 4-20mA input);
9.Expansion Valve:6 channels:
10.Communication Interface: 3 channels RS485.

邮件投递流程:

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@abc.com),通过DNS查询找到收件方服务器地址,再用SMTP协议把邮件转发过去,就像快递中转站把包裹送到目的地邮局。