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several IC-485S / IC-485SI units in a manner similar to Multidrop. The difference is that in a Simplex

configuration, the Master device can only talk, and the Slave devices can only listen.

Simplex uses reverse two wire cabling to link all the connected IC-485S / IC-485SI units, as

shown in the figure below:

For all IC-485S / IC-485SI units, set SW1 to DCE or DTE depending on what type of device the

IC-485S / IC-485SI will plug into (if it will plug into a DCE device, configure it for DTE, and vice

versa).

For all of the units (Master and Slave), set SW2 to TxRTS, RxRTS.

Monitor (IC-485S only)

With Monitor Mode, the RS-485S can be wired to the lines of 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.

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ATEN RS-485 Bedienungsanleitung Seite 7