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Appendixes
Serial Interface (Option)
Specications
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
Signal line that becomes active
when the printer can receive
data
5 CTS
Able to transfer
data
Signal line that becomes active
when other devices can receive
data from the printer
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 +3.3V (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
21-24 NC - Not used
Interfaces