I-o-display-systems Basic I/O Product Instrukcja Użytkownika Pobierz pdf (Strona 58)

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.

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 80 81

Brak uwag

I-o-display-systems Basic I/O Product Instrukcja Użytkownika Strona 58