Serial Vs Ethernet 비교

Why serial might be better
(Serial 통신의 장점)
Connecting the computer to devices using a serial cable is simpler than connecting with an Ethernet cable. With serial, there is no network card to install, no IP addressing to set up, and no software to install.
(네트워크 카드 및 IP주소 설정과 이를 위한 소프트웨어 설치가 요구되는 Ethernet 통신용 Cable에 비해 소프트웨어 설치가 필요하지 않는 Serial 통신용 케이블이라 사용이 간단하다.)

Serial connections have another advantage. If your controlling computer has an Ethernet network card, you do not have to use it for the lab automation network so you can use it to connect to your building’s general Ethernet network. If you want to set up an Ethernet network, you will have to install a second network card.
(별도의 IP Adress 할당없이도 네트워크를 구성 할 수 있다.)

사용 예 : 컴퓨터와 모니터간 RS-232 or HDMI Cable

Why Ethernet might be better
(Ethernet 통신의 장점)
Ethernet is a faster, more reliable, and more flexible communication technology than serial. Depending on the specifications of your computer, you may experience communication problems with a serial network, in which case you will have to use an Ethernet network.
(컴퓨터의 사양에 따라 통신 문제를 일으킬수 있는 Serial 통신보다 통신속도가 빠르고, 통신상태는 안정적이며 확장성이 뛰어나므로 Ethernet 통신을 사용한다.)

Another advantage of Ethernet networking is that you can run many devices from a single network port on your computer. Serial connections require one port for every device. If you are planning to network multiple devices, your computer may not have enough serial ports so you will have to add more.
(Serial 통신은 Device 마다 통신 포트가 필요하지만 Ethernet 통신의 경우, Device 만큼 통신포트가 요구되지 않을 뿐만아니라 네트워크 단일망 구성이 쉽다.)

사용 예 : Gateway와 컴퓨터 또는 TV 세텁박스 간/ Switching Hub와 IED 간)

Choosing between serial and Ethernet

- IED : Inteligent Electronic Device(디지털 보호 계전기)