2-24
Installation
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 (or terminal). A “Mark” condition is
held unless data or BREAK signals are being transmitted.
Received Data (RXD) ...................................................................................... (input)
Conveys signals from the printer (or terminal).
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 it is ON LINE. Circuit
DTR ON does not indicate that communication has been established with the
printer (or terminal). It is switched OFF when the unit is OFF LINE.
2.2
Installation