Epson XR510 manual Interface Connector, Serial Interface, USB Interface

2-2-1. Interface Connector
<D-SUB 25 Female Serial>	<Centronics Parallel>

<USB “B” Type>

<USB COMBO>

<Ethernet>

<Wi-fi>

Serial Interface

PIN	SIGNAL	I/O	DESCRIPTION
2	TXD	Output	Printer transmit data line RS-232C level
3	RXD	Input	Printer receive data line RS-232C level
4, 20	DTR	Output	Printer handshake to host line RS-232C level
6	DSR	Input	Data Send Ready
1, 7	GND	-	System Ground

USB Interface

PIN	SIGNAL	I/O	DESCRIPTION
1	+5V	-	+5V
2	DATA-	-	Printer transmit data line
3	DATA+	-	Printer transmit data line
4	GND	-	System Ground

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