SPRT SP-TL51 - Page 9

7
The pin assignment of serial interface is shown as 2-4, 2-5:
Pin No.
Signal
Name
Signal
Direction
Source
Description
1
FG
----
----
Cover ground
2
TXD
Output
Printer
Printer transmits control code X-ON/X-OFF and data
to host
3
RXD
Input
Host
Printer receives data from host
4
RTS
Output
Printer
Same with 20pins DTR signal
6
DSR
Input
Host
Signal “MARK” means the host is busy and can not
receive data. Signal “SPACE” means the host is
ready to receive data.
7
GND
----------
-------
Signal Ground
20
DTR
Output
Printer
Signal “MARK” means the host is busy and can not
receive data.Signal “SPACE” means the host is
ready to receive data.
Fig. 2-4 Pin assignment of DB-25 socket serial port
Pin No.
Signal
Name
Signal
Direction
Source
Description
1
NC
----
----
2
RXD
Input
Host
Printer receives data from host
3
TXD
Output
Printer
Printer transmits control code X-ON/X-OFF and data
to host
4
DSR
Output
Printer
Signal “MARK” means the host is busy and can not
receive data.Signal “SPACE” means the host is
ready to receive data.
5
GND
----
----
Cover ground
6
DTR
Input
Host
Signal “MARK” means the host is busy and can not
receive data.Signal “SPACE” means the host is
ready to receive data.
7
CTS
Output
Printer
Same with DSR
8
RTS
Input
Host
Same withDTR
9
NC
----
----
Fig. 2-5 Pin assignment of DB-9 hole socket(female) serial port
Note: (1)”Source” means the source where signal come from;
(2) Signal logic level is EIA.
The baud rate and data structure in serial interface mode is 9600bps, 8-bit data bits, no
parity bit and 1 stop bit. The serial interface of SP-TL51 can be connected to standard