８
6
6
7
5
5
3
8
2
1
DSR
G N D
R T S
T X D
R X D
2
3
D S R
G N D
C T S
D C D
R X D
T X D
6
DSR
Printer
Signal “SPACE” indicates that the printer is
“ONLINE”
7
GND
—
Signal Ground
8
DCD
Printer
Same to signal CTS
Note:
①
“Source” denotes the source that signal come from;
②
Logical signal level is EIA.
Fig.2-3 Pin Assignment of Serial Interface
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-POS88
Ⅳ
can be connected to standard
RS-232CRS-232C interface. When it is connected to IBM PC or its
compatible machine, connection can accord to Fig.2-4.
DSR
6
G N D
7
R T S
5
T X D
3
R X D
2
6 D S R
7 G N D
5 C T S
8 D C D
3 R X D
2 T X D
Printer
IBM PC Serial
Printer
IBM PC Serial
25PIN Socket
Interface DB-9
25PIN Socket
Interface DB-25
Fig.2-4 Connection between SP-POS88
Ⅳ
and IBM PC Serial Interface
Sketch Map
2.3.2 Parallel Interface
The parallel interface of SP-POS88
Ⅳ
printer is compatible with
CENTRONICS, supports BUSY or ACK handshaking protocol, uses DB25
socket (male) or 36pin CENIRONICS socket (female) optional.
The pin order of parallel port is as Fig. 2-5 shows:
Fig.2-5 Pin Order of Parallel Port
The pin assignment of DB25 parallel interface is shown in Fig. 2-6 shows:
Pin No.
Signal
Direction
Description
