TC-52B转换器通过从RS-232端口取电来实现RS-232到RS-422/485转换,它将RS-232的TxD和RxD信号转换为半双工的2线RS-485差分信号或全双工的4线RS-422/485信号
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	|              DIP Switch Settings              |         ||
|              RS-422              |                          SW1              |                          SW2              |         
|              OFF              |                          OFF              |         |
|              2-wire RS-485              |                          SW1              |                          SW2              |         
|              ON              |                          ON              |         |
|              4-wire RS-485              |                          SW1              |                          SW2              |         
|              ON              |                          OFF              |         |
|              Terminator Enb/Dis              |                          SW3              |                          SW3              |         
|              ON              |                          OFF              |         |