Rs-422 - Printronix N7000 H-Series User Manual

Chapter 5
RS-232 and RS-422 Serial Interfaces

RS-422

Table 11. PSA3 RS-422 Serial Interface Connector Pin Assignments
Signal
- Receive Data
+ Receive Data
+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:
170
Input Signals
Pin Signal
1 - Transmit Data
(-RD) (-TD)
6 + Transmit Data
(+RD) (+TD)
± ±
RD and TD form signal and return paths of a differential line signal.
Output Signals
Pin Signal
3 Chassis/Signal
Ground
8
Miscellaneous
Pin
5