21
Ethernet Interface
Pin
Signal
I/O
1
Data Out +
Output Data +
2
Data Out -
Output Data -
3
GND
Ground
4
Data IN +
Input Data +
5
Data IN -
Input Data -
6
N.C
-
7
N.C
-
8
N.C
-
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
9Pin Serial Interface
Pin
Signal
I/O
Description
3
RXD
Input
Printer receive data line RS-232C level
2
TXD
Output
Printer transmit data line RS-232C level
6,8
DTR
Output
Printer handshake to host line RS-232C level
5
GND
-
System Ground
4
DSR
Input
Data Send Ready
1,7,9
NC
-
-
