User`s manual
Page
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6
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2
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2
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1. Interface Connector
<D
-
SUB 25 Female Serial Port> <D
-
SUB Centronics Parallel Port>
<4Pin
“
B
”
Type USB Port>
-
Serial
interface
PIN
SIGNAL
I/O
DESCRIPTION
2
T
x
D
Output
Printer transmit data line RS
-
232C level
3
R
x
D
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
-
Syste
m Ground
-
USB interface