分类 : 使用前须知/basic
RS-232/422/485是串行通信规则。
RS-232/422/485是指串行传送方式,使用的协议相同。
RS232/422/485 的差异如下。
区分 |
RS232 |
RS422 |
RS485 |
动作模式 |
Single-Ended |
Differential |
Differential |
最大 Driver/Receiver数 |
1 Driver, 1 Receiver |
1 Driver, 10 Receivers |
32 Drivers, 32 Receivers |
最长线路距离 |
约 15m |
约 1.2Km |
约 1.2Km |
最高通信速度 |
20 kbps |
10 Mbps |
10 Mbps |
传送方式 |
Full Duplex |
Full Duplex |
Half Duplex |
最大输出电压 |
±25V |
-0.25V to +6V |
-7V to +12V |
最大输入电压 |
±15V |
±10V |
-7V to +12V |
See also
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