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AX10445 Module Series User's Manual
Figure 5 illustrates the serial interface circuits for RS -232,
RS -422 and RS -485. Although the transmission speed and
distance increase greatly while applying RS -422/485, it is
essential to note that the transmission speed is inversely
proportional to it's distance. (See Table 2).
R S - 232
R S - 422A
R S - 485
DRIVER
DRIVER
DRIVERS
18
Transmission
Distance
15m
12m
120m
1200m
12m
120m
1200m
Table 2
RS-232C
Differential Signal Lines
RS-422A
Differential Signal Lines
RS-485
Transmission
Speed
20K bits/sec
10M bits/sec
1M bits/sec
100K bits/sec
10M bits/sec
1M bits/sec
100K bits/sec
Signal Line
RECEIVER
Ground
RECEIVER
RECEIVERS
Technical Reference
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