RS-232C Signals
• Receive Data (RXD):…(input)
Conveys signals from the printer or the PC.
• Transmit Data (TXD):…(output)
Conveys signals from the unit to the printer or the PC. A "Mark" condition is held unless data or BREAK
signals are being transmitted.
• Data Terminal Ready (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 or the PC. It is switched OFF when the unit is
OFF LINE.
• Signal Ground (SG)
Connects to the DC ground of the unit for all interface signals.
• Data Set Ready (DSR):…(input)
Installation Manual 297
2.14.1 Connection of Peripherals