B-2. Interface Connections - Star SP500 SERIES User Manual

Pin No. Signal Name
20 DTR
21 - 25 N.C.
13
25

B-2. Interface Connections

Refer to the interface specifications of the host for details on connecting to its
interface connector. The following illustration shows a typical connection
configuration.
Printer side
(D-sub 25 pin)
F-GND 1
TXD 2
RXD 3
RTS 4
DSR
6
S-GND 7
DTR 20
Direction
OUT X-On/X-Off Communication Mode
Always space, except during following conditions:
• Period between reset and communication enabled
• During self printing and dot alignment adjustment
Not connected
– 108 –
Function
IBM PC side
25 pin
1
2
3
4
5
6
7
8
20
1
14
9 pin
F-GND
3 TXD
2 RXD
7 RTS
8 CTS
DSR
6
5 S-GND
1 DCD
4 DTR