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How to communicate between RS485 over ethernet to LAN port on computer
- Thread starter netng
- Start date
No, RS-485 is not compatible with Ethernet!
That is NOT an RS-485 Ethernet port, it's an RS-485 RJ-45 port. This distinction matters. It is an RS-485 port that just happens to use the same connector (RJ-45) as the standard Ethernet port connector (RJ-45).
At best, connecting this RS-485 port to a computer's Ethernet port will result in no communication. At worst, you could damage your computer's Ethernet port. I've seen manufacturers use RJ-45 connectors like this for RS-485, but they put voltage on some of the pins, which could damage any Ethernet device connected to the port.
To connect that port to a computer, you need a USB to RS-485 adapter for the computer, and will need to cut one end off of a standard CAT-5 (or similar) cable, strip back the wires, and connect the appropriate wires to the USB to RS-485 adapter (the pinout of this RS-485 port should be documented in the manufacturer's user's manual).
That is NOT an RS-485 Ethernet port, it's an RS-485 RJ-45 port. This distinction matters. It is an RS-485 port that just happens to use the same connector (RJ-45) as the standard Ethernet port connector (RJ-45).
At best, connecting this RS-485 port to a computer's Ethernet port will result in no communication. At worst, you could damage your computer's Ethernet port. I've seen manufacturers use RJ-45 connectors like this for RS-485, but they put voltage on some of the pins, which could damage any Ethernet device connected to the port.
To connect that port to a computer, you need a USB to RS-485 adapter for the computer, and will need to cut one end off of a standard CAT-5 (or similar) cable, strip back the wires, and connect the appropriate wires to the USB to RS-485 adapter (the pinout of this RS-485 port should be documented in the manufacturer's user's manual).
No. RJ-45 is a connector format. The individual pins are significant based on the protocol/make/model/OEM design. Below is an EXAMPLE of what some particular device pin designations are, not your device. Get the manual for your particular device and determine the pinout of the connection weather its RJ-45, d-sub 9, d-sub 25, Amphenol, proprietary, or whatever. Just because you can pick up a cable off the ground and stick it in a hole doesn't mean the device will start talking.
