3. Interface Specifications
Note :
Pin 9 on
AP 2.4
are reserved for
KDU(keyboard device unit), therefore do not connect these
pins if you are using a general host like a PC.
Serial
For
Ap 2.4
, the RS232 connector on the printer side is a
female, DB-9.
Connection with host:
Pin
Direction
Definition
1 In
DSR
2
In
RxData
3
Out
TxData
5
-
Ground
6
Out
DTR
7
Out
RTS
8
In
CTS
9
Out
+5V
Host 25S
Printer 9P
Host 9S
Printer 9P
(PC or compatible)
(PC or compatible)
DTR 20 …… 1 DSR
DTR 4
…… 1 DSR
DSR 6
…… 6 DTR
DSR 6
…… 6 DTR
TX 2
…… 2 RX
TX 3
…… 2 RX
RX 3
…… 3 TX
RX 2
…… 3 TX
CTS 5
…… 7 RTS
CTS 8
…… 7 RTS
RTS 4
…… 8 CTR
RTS 7
…… 8 CTS
GND 7 …… 5 GND
GND 5
…… 5 GND
56
Alternatively you can just connect the 3 wires in the following way.
Host 25S
Printer 9P
Host 9S
Printer 9P
(PC or compatible)
(PC or compatible)
TX 2
…… 2 RX
TX 3
…… 2 RX
RX 3
…… 3 TX
RX 2
…… 3 TX
GND 7 …… 5 GND
GND 5
…… 5 GND
pin 4
pin 4
pin 5
pin 6
pin 6
pin 7
pin 20
pin 8
55
