Panasonic KX-TD500, System Reference Manual

Page: 146 / 1574

2-D-4
1) Pin Configuration (“PROG”, “SMDR”)
Pin
Number
1
2
3
4
5
6
7
8
20
FG Frame Ground
TXD Transmitted Data
RXD Received Data
RTS Request To Send
CTS Clear To Send
DSR Data Set Ready
SG Signal Ground
DCD Data Carrier
Detect
DTR Data Terminal
Ready
Signal Name
Circuit Type
EIA CCITT
AA 101
BA 103
BB 104
CA 105
CB 106
CC 107
AB 102
CF 109
CD 108.2
EIA (RS-232C) SIGNALS:
Frame Ground (FG);
Connects to the unit frame and the earth ground
conductor of the AC power cord.
Transmitted Data (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 (RXD); ..............................(input)
Conveys signals from the printer.
Request To Send (RTS);........................(output)
This lead is held ON whenever DSR is ON.
Clear To Send (CTS); ...............................(input)
The ON condition of circuit 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 CTS is OFF.
Data Set Ready (DSR); ............................(input)
The ON condition of circuit DSR indicates the
printer is ready. Circuit 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 (DTR)...................(output)
This signal line is turned ON by the unit to
indicate that it is ON LINE. Circuit DTR ON does
not indicate that communication has been
established with the printer. It is switched OFF
when the unit is OFF LINE.
Data Carrier Detect (DCD) .......................(input)
The ON condition is an indication to data terminal
(DTE) that the carrier signal is being received.