Manual

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Chapter 5 RS-232 and RS-422 Serial Interfaces
RS-422
+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: ± RD and ± TD form signal and return paths of a differential line signal.
Table 11. PSA3 RS-422 Serial Interface Connector Pin Assignments
Input Signals Output Signals Miscellaneous
Signal Pin Signal Pin Signal Pin
- Receive Data
(-RD)
1 - Transmit Data
(-TD)
3 Chassis/Signal
Ground
5
+ Receive Data
(+RD)
6 + Transmit Data
(+TD)
8