Serial Interface (Rs-232C) Signals - Panasonic KX-TA1232 Installation Manual

General Installation
If you connect a printer or an IBM-PC with a 9-pin cable, follow the chart below.
System
Circuit
Type
(EIA)
AA
BA SD (TXD)
BB
RD (RXD)
CA
RS (RTS)
CB
CS (CTS)
CC
DR (DSR)
CB
CC
ER (DTR)
Note
Please read your printer manual and connect the first EIA pin (FG) of this unit to the printer
cable.

Serial Interface (RS-232C) Signals

Frame Ground: FG
Connects to the unit frame and the earth ground conductor of the AC power cord.
Transmitted Data: SD (TXD): (output)
Conveys signals from the unit to the printer. A "Mark" condition is held unless data or BREAK
signals are being transmitted.
Received Data: RD (RXD): (input)
Conveys signals from the printer.
Request to Send: RS (RTS): (output)
This lead is held ON whenever DR (DSR) is ON.
Clear To Send: CS (CTS): (input)
An ON condition of circuit CS (CTS) indicates that the printer is ready to receive data from the
unit. The unit does not attempt to transfer data or receive data when circuit CS (CTS) is OFF.
Data Set Ready: DR (DSR): (input)
An ON condition of circuit DR (DSR) indicates the printer is ready. Circuit DR (DSR) ON does
not indicate that communication has been established with the printer.
Signal Ground: SG
Connects to the DC ground of the unit for all interface signal.
Data Terminal Ready: ER (DTR): (output)
This signal line is turned ON by the unit to indicate that it is ON LINE. Circuit ER (DTR) ON
does not indicate that communication has been established with the printer. It is switched OFF
when the unit is OFF LINE.
52
Signal Pin
Name No.
FG 1
2
3
4
5
6
SG 7
20
9-pin Cable Printer/IBM-PC
Circuit
Pin Signal
Type
No. Name
(EIA)
2 RD (RXD) BB
BA
3 SD (TXD)
CD
4 ER (DTR)
AB
5 SG
CC
6 DR (DSR)
CA
7 RS (RTS)
CB
8 CS (CTS)
Installation Manual