Printronix ProLine 5 Series Manual page 192

Table 5–6. RS–422 Serial Interface Connector Pin Assignments
Input Signals
Signal
– Receive Data (–RD)
+ Receive Data (+RD)
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
signal.
Interfaces
Output Signals
Pin Signal
15 – Transmit Data (–TD)
17 + Transmit Data (+TD)
TD form signal and return paths of a differential line
Miscellaneous
Pin Signal
19 Chassis Ground
25 Signal Ground
Pin
1
7
5–17