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Otasuke FAQ's Book
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 The method of RS-422 communication by PL-5900 / X920 series and PS-2000B.

RS-422 communication can be performed by connecting PL-RC500 (option article) to COM.

Please refer to the following table.

Enabled device:PL-5900 series, PL-X920 series, PS-2000B


PL-5900 series PL-X920 series PS-2000B
COM COM2 COM2 COM1
COM3 COM3 COM3
SW position side of main unit(next to COM) on the Main board on the Main board
SW setting no SW name +5 SW3 ON SW2 +5
no SW name +5 SW3 ON SW3 +5

However, it is necessary to operate the main function switch on the position of each SW for operation.(*1

Please refer to each PL user's manual for details. [Interface Specification]-> [RS-232C Interface]
Download User Manual here


* 1 5V power supply is needed to operate PL-RC500. COM output RI signal at the state of default and can be exchanged to 5V output by a dip switch setting.



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