C-2. RS-232C Connector
Signal
Pin No.
name
1
FG
Frame ground
2
TXD
3
RXD
Receive data
4
RTS
Request to send
5
CTS
Clear to send
6
DSR
Data set ready
7
SG
8
–
9
–
10
–
11
–
12
–
*13
SG2
Ground for +24V
The signals marked with "*" should not be used to supply power if the AC adapter
is used. Doing so may result in damage to the power supply.
Note: Connector on printer side: DALC-J25PAF-23L8 (from Japan Avia-
tion Electronics Industry, Ltd.) or equivalent
Connector on cable: DA-25SF-N (from Japan Aviation Electronics
Industry, Ltd.) or equivalent
I/O
Function
direction
Send data
OUT
IN
OUT
IN
IN
IN
13
12
11
10
9
8
25
24
23
22
21
<Viewed from Connector Surface>
Signal
Pin No.
name
*14
SG2
Ground for +24V
15
–
16
–
17
–
*18
+24V
mechanical section
*19
+24V
mechanical section
20
DTR
Data terminal ready
21
–
22
–
23
–
24
–
25
INIT
7
6
5
4
3
20
19
18
17
16
15
– 100 –
I/O
Function
direction
IN
Drive power for
IN
Drive power for
IN
OUT
IN
2
1
14