Rs-422 - Printronix T4204 User Manual

Chapter 4
RS-232 And RS-422 Serial Interfaces
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

Table 12. RS-422 Serial Interface Connector Pin Assignments
Input Signals
Signal Pin
- Receive Data 15
(-RD)
+ Receive Data 17
(+RD)
+RD, -RD—Serial data stream differentially received by printer.
+TD, -TD—Differentially driven serial data stream for transmitting status and
control information to the host. Subject to protocol selection.
NOTE:
186
Output Signals
Signal
- Transmit Data
(-TD)
+ Transmit Data
(+TD)
RD and TD form signal and return paths of a differential line signal.
Miscellaneous
Pin Signal
19 Chassis Ground
25 Signal Ground
Pin
1
7