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9 pin D-SUB female connector layout
9 pin D-SUB female connector
at the computer
25 pin D-SUB male connector layout
25 pin D-SUB male connector
at the Epson printer
For most of models Epson printers
computer Pin
Name		computer Pin
Number		DirectionEpson printer Pin
Number		Epson printer Pin
Name		Description
Receive Data (RxD) 2 <-- 2 Transmit Data (TxD)  
Transmit Data (TxD) 3 --> 3 Receive Data (RxD)  
Data Terminal Ready (DTR) 4 --> 6 Data Set Ready (DSR)  
System Ground (SG) 5 --- 7 System Ground (SG)  
Data Set Ready (DSR) 6 <-- 20 Data Terminal Ready (DTR)  
Clear To Send (CTS) 8 <-- 4 Request To Send (RTS)  

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Pinouts.ru > Serial interfaces cables and converters schemes listing > Pinout of Serial Printer (9-25) Epson cable and layout of 9 pin D-SUB female connector and 25 pin D-SUB male connector
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