Serial port on E-Lins 4g sim router
You may have noticed that there are green terminals or DB9 ports on E-Lins 4g sim routers, what are they for? If you have used PLC, you should know that the communication between PLC and control equipment is basically based on serial communication interface, which is controlled by its corresponding communication protocol, and for serial communication interface, including RS232, RS422 and RS485. Visit- https://www.szelins.com/serial-port-on-e-lins-4g-sim-router-a-466.html
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