Connectors And Signals - Star Micronics SP300 Series Programmer's Manual

2-3. Connectors and Signals

RS-232C
Pin no. Signal name
1 F-GND
2
3
4
5
6
7 S-GND
8
9-10
11
12
13 S-GND
14 FAULT
15 Multi-printer TXD
16 Multi-printer DTR
17 to 19
20
21-22
23 to 25
I/O
direction
—
TXD OUT
RXD IN
RTS OUT
CTS IN
N/C
—
N/C
N/C
RCH OUT
N/C
—
OUT
OUT
OUT
N/C
DTR OUT
N/C
N/C
14
1
Fig. 2-4 Serial interface connector
Frame ground
Transmitted data
Received data
Data transmission request signal. This is al-
ways "SPACE" when the printer is turned on.
This signal changes to "SPACE" when
host computer is ready to transmit data. (In
this instance, the printer does not check this
signal.)
Not connected
Signal ground
Not connected
This pin is used when using the optional
interface board.
This signal changes to "SPACE" when the
printer is ready to receive data. (The signal
line is same as pin 20.)
Not connected.
Signal ground
When printer error occurs (such as paper
out, mechanical error, etc.), this signal is
set to "MARK".
Diode coupled TXD
Diode coupled DTR
This pin is used when using the optional
interface board.
Data terminal ready signal. When the printer
is ready to receive data, this signal changes
to "SPACE".
Not connected
This pin is used when using the optional
interface board.
– 10 –
Function
25
13