OM9300F Technical Manual
Rev.
1.0
Document No.: 19B00270
Date: Jan 09, 2018
Page: 7
2. Configuration
2.1 Interface
2.1.1 RS-232 serial interface
2.1.2 Specifications
Data transmission: Serial
Synchronization:
Asynchronous
Handshaking:
DTR/DSR or XON/XOFF control
Signal levels:
MARK= -3 to –15V:
Logic “1”
SPACE= +3 to +15V: Logic “0”
Baud rage:
9600, 19200, 38400, 115200 bps
Data word length:
7 or 8 bits
Parity Settings:
None, even, odd
Stop bits:
1 or 2
Connector (printer side):
Female DB-9 pin connector
NOTE:
The data word length, baud rate, and parity depend on the
DIP switch settings.
2.1.3 Switching between on-line and off-line
The printer does not have an on-line/off-line switch.
The printer goes off-line:
•Between when the power is turned on (including reset using the
interface) and when the printer is ready to receive data.
•During the self-test.
•When the cover is open.
•During paper feeding using the paper feed button.
•When the printer stops printing due to a paper-end (in cases when an
empty paper supply is detected by either paper roll end detector or the
paper roll near-end detector with a printing halt feature by
ESC c4
).
•During macro executing stand by status.
•When a temporary abnormality occurs in the power supply voltage.
•When an error has occurred.
2.1.4 Interface connector terminal assignments and signal functions
PIN
SIGNAL
I/O
DESCRIPTION
2
TXD
-
Printer transmit data line RS-232C level
3
RXD
-
Printer receive data line RS-232C level
6
DTR
Output
Printer handshake to host line RS-232C level
4
DSR
Input
Data Send Ready
5
GND
-
System Ground
