pros & cons of RS232 vs RS485 vs ethernet
pros & cons of RS232 vs RS485 vs ethernet
(OP)
Hi all,
Thought I would post this question on eng tips. Can anyone explain the pros and cons of RS232 , RS 485 and ethernet comms protocols in terms of cost, speed, installation, ease of config, noise, cable distance...etc
Thought I would post this question on eng tips. Can anyone explain the pros and cons of RS232 , RS 485 and ethernet comms protocols in terms of cost, speed, installation, ease of config, noise, cable distance...etc





RE: pros & cons of RS232 vs RS485 vs ethernet
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
www.bluetechnik.com
RE: pros & cons of RS232 vs RS485 vs ethernet
http://www
This link provides an overview of industrial ethernet. Make a matrix with your stated criteria and compare ethernet to the 232/485 serial transport layers
http:/
RE: pros & cons of RS232 vs RS485 vs ethernet
Ethernet rules.
Peter Nachtwey
Delta Computer Systems
http://www.deltamotion.com
RE: pros & cons of RS232 vs RS485 vs ethernet
RS-232 = One device to one device, very close proximity, not a lot of noise. Speed = lowest. Implementation = easy. Cost = cheapest. Applications = programing ports, one-to-one comms.
RS-485 = Multiple devices on one cable, more noise immune, thousands of feet. Speed = medium. Implementation = easy. Cost = cheap, but sometimes not as cheap as RS-232 if it was built-in (i.e. PCs). Applications = Small networked single point nodes, smart devices, SCADA, programming over small networks.
Ethernet = Virtually any number of devices, virtually unlimited distance (through various technologies), very noise immune. Speed = quantum faster than RS-485. Implementation = most difficult initially (but very common now). Cost = highest.
Applications = WANS, LANs, high speed nodes, long distance SCADA but it's often overkill for single point nodes.
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RE: pros & cons of RS232 vs RS485 vs ethernet
One example of this is ethernet radios on a licensed band. The radio bandwidth is usually very limited, about 9600 baud. Unfortunately to make the radio behave like an ethernet switch, some of that radio bandwidth is used as overhead. So you are better off using straight serial.
RE: pros & cons of RS232 vs RS485 vs ethernet
This is like taking a fast train from NY to LA but swimming the Mississippi.