Printronix L5520 User Manual page 221

RS-232 Serial Interface Signals
The RS-232 serial interface signals are defined below:
•
Receive Data (RxD) - Serial data stream to the printer.
•
Transmit Data (TxD) - Serial data stream from the printer for
transmitting status and control information to the host. Subject
to protocol selection.
•
Request To Send (RTS) - Control signal from the printer.
Subject to configuration.
•
Clear To Send (CTS) - Status signal to the printer indicating the
host is ready to receive data/status signals from the printer.
When CTS is enabled, DSR and CTS must both be asserted
for the printer to transmit flow control characters to the host.
•
Data Set Ready (DSR) - Status signal to the printer indicating
the host is in a ready condition. DSR is ignored unless CTS or
CD are enabled.
•
Carrier Detect (CD) - Status signal to the printer. The ON
condition is required for the printer to receive data. Available as
a configuration setup option. When CD is enabled, the host
must assert both DSR and CD for the printer to accept data.
•
Data Terminal Ready (DTR) - Control signal from the printer to
the host. When enabled, the host activates the data channel.
Subject to configuration.
RS-232 Serial Interface
221