Appendixes
53
Interfaces
This printer is connected to a computer and prints according to commands
sent from the computer.
There are three types of computer interfaces, and these are connected to
devices suited to each type of interface. The printer can also be connected
to a computer by the optional Ethernet.
Serial Interface
Specifications
System
Start/stop asynchronous duplex communication
Signal level
RS-232C
Baud rate
2400, 4800, 9600, 19200, 38400, 57600, 115200bps
Bit length
7Bit, 8Bit
Stop bit
1Bit, 2Bit
Parity
Odd, even, none
Connector
D-SUB 25PIN
Signal line and pin arrangement
Pin No.
Signal code
Signal name
Function
1
FG
Protective
grounding
Protective grounding
2
TXD
Transmitted data
Signal line that transmits data
from the printer to other devices
3
RXD
Received data
Signal line that transmits data
from other devices to the printer
4
RTS
Transmission
request
Pull up to +5.4V through 3.3kΩ
5
NC
------
Not used
6
DSR
Data set relay
Signal line that is active when
an external device can interface
with the printer
7
SGND
Signal line
ground
Shows the ground level of the
signal line
8-13
NC
------
Not used
14
VCC
+5V
(FACTORY USE ONLY )
15-19
NC
------
Not used
20
DTR
Data terminal
relay
Signal line that is active when
an external device can interface
with the printer
21-25
NC
------
Not used
