Datasheet

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Monitor IIX-485S Only!
With Monitor Mode, the RS-485S can be wired to the lines of an
RS-485 or RS-422 device to monitor the line signals. In this
configuration, the RS-485S changes the functions of T+ and T- to
R’+ and R’- respectively.
 Set SW1 to Monitor.
 Set SW2 to TxRTS, RxON
Note: 1. The RTS must be Low in Monitor Mode.
2. The R+ and R- signals are converted and linked to the
RS-232 port, DB-25 pin 3. The R’+ and R’- (T+ and T-)
signals are converted and linked to the RS-232 port,
DB-25 pin 2.
Device 1
T+
T -
R-
R+
Device 2
R+
R-
T-
T+
IC-485S
T+ (R'+)
T- (R'-)
R-
R+
PC
COM1/
COM2