Rs-232 Serial Interface - Epson EU-m30 Series Developer's Manual

1.15.3

RS-232 serial interface

(1) Connectors
 Type
 Pin assignments
Pin number
1
2
3
4
5
6
7
8
9
Shell
(2) Specifications (Complies with RS-232)
Data transmission method:
Synchronization:
Handshaking:
Signal levels:
Transmission speeds:
Bit length:
Parity settings:
Stop bits:
Connector:
Notes:
 Handshaking, bit length, transmission speed and parity settings are the same as the setting of the
communication conditions of the serial interface (3.5.2).
 The stop bit for data transfer from the printer is fixed at 1 bit.
(3) Online/Offline switching
This printer does not have an online/offline switch. This printer goes offline under the following conditions:
 During the period from when the power is turned on until the printer is ready to receive data after
mechanism initialization
 During a self-test
 When the cover is open
 Feeding paper via Feed switch
 When the printer stops printing due to a paper-end (when a paper-end is detected by the roll paper-end
sensor)
 When waiting for a switch to be pressed during macro execution
 When an error has occurred
D-SUB9 (Male)
Function
–
RXD
TXD
DTR
SG
DSR
RTS
–
–
Shield
Serial
Asynchronous
DTR/DSR or XON/XOFF control
MARK = -3 to -15 V: Logic "1"/ OFF
SPACE = +3 to +15 V: Logic "0"/ ON
2400, 4800, 9600, 19200, 38400, 57600, 115200 bps
[bps: bits per second]
7 and 8-bit
None, even, odd
1 or more
D-SUB9 (Male)
18