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PSA3 Printers
NOTE: The RS-422 is optional for PSA3.
Table 16. PSA3 RS-422 Serial Interface Connector Pin Assignments
Input Signals
Signal
Pin
- Receive Data
1
(-RXD)
+ Receive Data
6
(+RXD)
+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.
±
±
NOTE:
RXD and
TXD form signal and return paths of a differential
line signal.
Output Signals
Signal
Pin
- Transmit Data
3
(-TXD)
+ Transmit Data
8
(+TXD)
RS-422
Miscellaneous
Signal
Pin
Chassis/Signal
5
Ground
295
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