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Chapter 3 l l Operation
18
In the graph, TA, TB, RA and RB could be either from RJ-45 or
Terminal Block. The settings of the switches for each A50 (or
A51) are as follows:
SW1 SW2 Pin1 Pin2 Pin3 Pin4
Full-duplex mode Off TxD always enabled On Off X X
RxD always enabled X X On Off
A50/A51
RA
RB RS-422/ RS-232
TB RS-485
TA
GND
DTE/
DCE
A50/A51
RS-232
TA
RS-422/ TB
RS-485 RB
RA
GND
DTE/
DCE
A50/A51
RA
RB RS-422/ RS-232
TB RS-485
TA
GND
DTE/
DCE