6
2-2-1. Interface Connector
<9 Pin Serial>
<USB “B” Type>
<Ethernet>
9Pin Serial Interface
Pin
Signal
I/O
Description
2
RXD
Input
Printer receive data line RS-232C level
3
TXD
Output
Printer transmit data line RS-232C level
4, 7
DTR
Output
Printer handshake to host line RS-232C level
5
GND
-
System Ground
6
DSR
Input
Data Send Ready
1,8,9
NC
-
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
