
EC-PM-530D User's Manual
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USB Interface is 2.0 Full-Speed interface, and displayed as a USB port on the computer finally. User
can carry out USB printing by selecting corresponding USB port.
5.2.4 Serial Interface
EC-PM-530D printer’s serial interface is compatible with RS-232C protocol, supporting RTS/CTS
and XON/XOFF handshaking protocol. Its connector is a DB-9 type connector and pin number of
serial interface connector is shown as below.
Signal definition of each pin is shown as Table A-3:
The default settings of baud rate and data configuration in serial connecting way are 9600bps, 8 bits,
parity check disabled and 1 stop bit.
EC-PM-530D printer’s serial interface can be connected with the standard RS-232C interface. When
connecting with a PC, the connecting picture is shown as Figure 5-7. While connecting with an IBM PC
or a compatible PC, you can connect the cable as shown in Figure 5-8.
Pin
Number
Signal
From
Description
2 RXD
Host
Printer receives data from Host
3 TXD
Printer
Printer sends control code X-ON/X-OFF and
data to the Host
8 CTS
Printer
“MARK” state means printer is too busy to
receive data; “SPACE” means printer is ready to
receive data.
5 GND
—
Signal
GND
4
DTR
Printer
Data terminal is ready
Figure 5-5 Connection figure of printer and computer with USB interface
D0
D7
VBUS
GND
D+
D-
D0
PDIUSBD12
D7
Printer’s 26PIN connector
PDIUSBD12 chip
USB-B connector
Figure 5-6 Pin number of serial interface connector
Table A-3 Signal of the serial interface pin
Note:
①
“From” means the source where signal comes out.
②
The logical level of signal is EIA level.
5 1
9 6
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