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Chapter 4 RS-232 And Optional RS-422 Serial Interfaces
Data Terminal Ready (DTR). Control signal from the printer. Subject to
configuration.
RS-422
NOTE: The RS-422 serial interface connector is optional.
NOTE:
±RXD and ±TXD form signal and return paths of a differential line
signal.
+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.
USB
Menus
The Universal Serial Bus (USB) port is part of Auto Switching and is active
when the Host Interface menu is set to Auto Switching. It can also be selected
as the only Host Interface under the Host Interface menu by selecting USB.
The Host Interface menu is only available when the Admin User menu is
enabled.
A top level USB Port menu with two submenus is also available:
• Buffer Size in K - the input buffer size used by the USB port. The range
is from 1 to 16. The default is 16.
• Timeout - the Hotport Timeout value used to determine when the port is
inactive. The range is from 1 to 60 seconds. The default is 10 seconds.
Table 15. RS-422 Serial Interface Connector (9 Pin) Assignments
Input Signals Output Signals Miscellaneous
Signal Pin Signal Pin Signal Pin
- Receive Data (-RXD) 1 - Transmit Data (-TXD) 3 Chassis/Signal Ground 5
+ Receive Data (+RXD) 6 + Transmit Data (+TXD) 8
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