4.2.4 Configuring the X.21
QuikConnect™ Module
The serial port on the X.21
QuikConnect™ Module is default wired
as a DCE, but may be switched to a DTE. This is done by reversing
the orientation of the DCE/DTE strap, as described below:
To reverse DCE/DTE orientation, remove the module according to
the instructions in Section 4.2.1. The DCE/DTE strap is located on
the bottom side of the module’s PC board. The arrows on the top of
the strap indicate the configuration of the X.21 port (for example, if the
DCE arrows are pointing toward the DB-15 connector, the X.21 port is
wired as a DCE). Reverse the DCE/DTE orientation by pulling the
strap out of its socket, rotating it 180º, then plugging the strap back
into the socket. You will see that the DCE/DTE arrows now point in
the opposite directions, showing the new configuration of the X.21
port. Reinstall the module according to the instructions in Section
4.2.1.
4.3 CONNECTING POWER
The Model 2073 is available with two power supply options:
Universal Interface AC Power Supply option (Model 2073-UI)
operates in environments ranging from 100 to 253 VAC, with no re-
configuration necessary (see Appendix B for available domestic and
international power cords).
DC Power Supply option (Model 2073-DC) operates in 48 VDC
environments and is equipped with a 3-pin “terminal strip” style con-
nector.
4.3.1 Connecting to an AC Power Source
The Universal Interface AC Supply is equipped with a male IEC-
320 power connection. A domestic (US) power supply cord is sup-
plied with the unit at no extra charge. To connect the standard or uni-
versal power supply, follow these steps:
1)
Attach the power cord (supplied) to the shrouded male IEC-
320 connector on the rear of the Model 2073.
2)
Plug the power cord into a nearby AC power outlet.
3)
Turn the rear power switch ON.
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4.3.2 Connecting to a DC Power Source
The 48 VDC power supply option uses a 3-pin terminal block with
spring-type connectors. Please refer to the Model 1090 Series Service
Manual for the power line voltage connections.
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NOTE:
Pin-out requirements for null modem applications vary
widely between manufacturers. If you have any questions about
a specific application, contact Patton Electronics Technical
Support.
WARNING!
There are no user-serviceable parts in the
power supply section of the Model 2073. Fuse replacement
should only be performed by qualified service personnel.
Contact Patton Electronics Technical support at (301)975-
1007, via our web site at http://www.patton.com, or by e-mail
at [email protected], for more information.
