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Installation 2
2-4(Vol.2)
RS-422:
Advantages:
Easier to implement in software since host driver need not be controlled.
Can be either Multidrop or Repeat.
No turn-around delay required.
Disadvantages:
Requires five conductor wire instead of three.
RS-485:
Advantages:
Needs only 3 wire conductor.
Disadvantages:
Host 485 driver control must be implemented requiring tricky serial port
manipulations.
Can only be Multidrop.
Usually requires turn around delay implementation.