Printronix SL_T5R Energy Star - Manual (Page 288)

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Chapter 5 RS-232 and Optional RS-422 Serial Interfaces
Received Data (RXD). Serial data stream to the printer.
Transmitted 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.
Data Set Ready (DSR). Status signal to the printer indicating the host is in a
ready condition.
Data Carrier Detect (DCD). Status signal to the printer. The ON condition is
required for the printer to receive data.
Data Terminal Ready (DTR). Control signal from the printer. Subject to
configuration.
RS-422
NOTE: The RS-422 serial interface connector is optional.
NOTE:
±
RXD and
±
TXD form signal and return paths of a differential line
signal.
+RXD, -RXD. Serial data stream differentially received by printer.
+TXD, -TXD. Differentially driven serial data stream for transmitting status
and control information to the host. Subject to protocol selection.
Table 16. RS-422 Serial Interface Connector (9 Pin) Assignments
Input Signals Output Signals Miscellaneous
Signal Pin Signal Pin Signal Pin
- Receive Data (-RXD) 1 - Transmit Data (-TXD) 3 Chassis/Signal Ground 5
+ Receive Data (+RXD) 6 + Transmit Data (+TXD) 8