Rs-422 - Printronix T5000 User Manual

Chapter 4
RS-232 And RS-422 Serial Interfaces

RS-422

Table 13. RS-422 Serial Interface Connector Pin Assignments
Input Signals
Signal Pin
- Receive Data (-RD) 15
+ Receive Data (+RD) 17
+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:
240
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