SPRT SP-RMDIIID, User Manual

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8
TXD 2 2 printer
Printer send data to computer,
when use X-ON/X-OFF
handshaking protocol, the printer
will send control code
X-ON/X-OFF to computer
CTS 8
4
printer
When the signal show “MARK”, it
is means the printer is busy and
can not receive data, when the
signal show “ SPACE”, it is means
the printer get ready and can
receive data.
DSR 6
1
Printer
when the signal show “ SPACE” it
is mean the printer online
GND 5 5
－
Signal ground
DCD 1 Printer Same as CTS
3-1 Serial interface pin number definition
Mark:
①
”Source” means the source for the signal
②
The signal logic is divided into EIA and TTL level due to insert different sockets;
Under the serial interface connect, the baud rate and data structure can be set with button
or software, Before out of factory the product has been set to 9600bps, 8 data bits, no
calibration and a stop bit; two types of handshaking protocol agreement can be chosen.
One is mark control way, other is X-ON/X-OFF agreement, two kinds of handshaking
protocol agreement’s instructions shown as figure 3--2:
Type of
handshaking
protocol
agreement
Data direction RS-232C interface signal
mark control
Data allowable Signal line 1 and 8 are show Space
Data disallowed Signal line 1 and 8 are show Mark