Panasonic KX-TD500 Installation Manual page 160

Installation
Pin No.
5 CTS
(No Connection)
6 DR (DSR)
7 SG
8 DCD
20 ER (DTR)
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 (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 signal is not used.
Clear To Send (CTS);.....(input)
This signal is not used.
Data Set Ready (DSR);.....(input)
The ON condition of circuit DSR indicates that 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 signals.
Data Carrier Detect (DCD).....(input)
The ON condition is an indication to data terminal (DTE) that the carrier signal is being
received.
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.
160
Pin Configuration (PROG/SMDR)
Signal Name
Clear To Send
Data Set Ready
Signal Ground
Data Carrier
Detect
Data Terminal
Ready
Circuit Type
(Serial
Interface)
CB
CC
AB
CF
CD
Installation Manual