2   Design
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Grid Connect Photovoltaic Inverte KP100L-OD-USER’S MANUAL
(5)-1 RS-232C 
Connect the wire to 1: RS-232C(TXD), 2 : RS-232C(RXD), and 3 : GO of communication terminal block 
(TB401). When you connect the wire, insert the wire while pushing the black button of TB401 and 
release the button.
*Note: Note the wrong wiring of the signal wire, and the catch of the insulating coating.
(5)-2 RS-485
(5)-2-1 Wiring for RS-485
Connect the wire to 3: GO, 4: RS-485_DB(+), 5: RS-485_DA(-) of communication terminal 
block(TB401). When you connect the wire, insert the wire while you push the black button of TB401 
and release the button.
*Note: Note the wrong wiring of the signal wire, and the catch of the insulating coating.
TB402
TB401
Black button
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GO
RS-232C(TXD)
RS-232C(TXD)
TB402
TB401
Black button
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GO RS-485_DB(+) RS-485_DA(-)