2 rs-232c interface (oki standard type) – Oki POS 425S User Manual
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Developer’s Guide: English
61
5.3.2 RS-232C Interface (OKI Standard Type)
1
Interface signals
A25013.doc
Pin No.
Signal
Code
Signal
Function
1
Protective ground
PG
-
Frame ground
2
Transmitted Data
TD
From printer
Data from printer
3
Received Data
RD
To printer
Data to printer
4
Request to Send
RTS
From printer
Indicates printer cannot receive
data in printer and Customer
Display Busy/Ready protocol
6
(Note 2)
Data Set Ready
DSR
To printer
Indicates that data can be sent
7
Signal Ground
SG
-
Signal ground
20
Data Terminal Ready
DTR
From Printer
Indicates printer cannot receive
data in printer Busy/Ready
protocol
5,8 to 10,11,
12 to 19, 21
to 24
-
-
-
Unused
25
(Note 2)
Initial
INIT
To Printer
Requests printer reset
Note 1 Connector pin arrangement
OP425_06.eps
13
25
1
(View from the cable side)
14
Note 2 The enabled or disabled state of the initial state request signals assigned to pins 6 and 25 is selectable with the DIP
SW1-1 and DIP SW1-2.