Rs-232C Signals - Panasonic KX-TVP50E Installation Manual

INSTALLATION
Pin
Number
7
8
20

2.8.3 RS-232C Signals

Frame Ground (FG)
Connects an external ground to the unit frame, usually the earth pin of the AC power cord.
Transmitted Data (TXD)—output
Conveys signals from the unit to the terminal/printer. A "mark" condition is held unless data
or BREAK signals are being transmitted.
Received Data (RXD)—input
Conveys signals from the terminal/printer to the unit.
Request To Send (RTS)—output
This lead is held on whenever DSR is on.
Signal Ground (SG)
Connects to the DC ground of the unit for all interface signals.
Data Terminal Ready (DTR)—output
This signal line is turned on by the unit to indicate that the RS-232C is on line. Circuit DTR
ON does not indicate that communication has been established with the terminal/printer. It is
switched off when the RS-232C is off-line.
40
Table 7 Pin Configuration of the RS-232C
Signal Name
SG Signal Ground
DCD Data Carrier Detect
DTR Data Terminal Ready
Circuit Type
RS-232C CCITT
AB 102
CF 109
CD 108.2
Installation Manual