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Chapter 3 Operating Instruction
3.1 Power and Communication Interface
3.1.1 Serial interface connection
SP-RMD8D uses PH-6PIN type interface to be power and communication
interface, definition of PIN assignment is like below:
Signal
name
PH-6PIN
Source
Explanation
VDC
1
－
Printer operating
voltage(5.0~8.5V)
TXD
2
Printer
Printer send data to host. When
X-ON/X-OFF handshaking
protocol is used, printer send
Control code X-ON/X-OFF to host.
RXD
3
Host
Printer receives data from
computer
BUSY
4
Printer
When data is 1high, it means
printer is too busy to receive data;
when data is 0 low, it means
printer is ready to receive data.
GND
5
－
Signal ground
EN
6
Printer
High level enables printer, low
level turns off printer
Picture3-1 Definition of PIN assignment of serial interface
Notice:
①
”Source” means where the source data comes from.
②
Non-listed pin No. is empty pin.
Under serial interface connection, baud rate and data structure can be set
through Setting Tool software. Default factory setting is 9600bps, 8bits data bit,
no parity and 1bit stop bit.
Baud rate support: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200,
etc, eight kinds.
There are two handshaking modes optional: One is Mark Control
Handshake, the other is X-ON/X-OFF Protocol Handshake. The explanation of
