Juniper Mesa Pro, User Manual

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3 Optional Features and Accessories
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3. Optional Features and Accessories
This chapter discusses the optional features that can be included
with the Mesa Pro Rugged Tablet.
3.1 RS-232 Port
An RS-232 9-Pin D-Sub connector is an optional feature for the
Mesa Pro. Depending on the settings, it will provide either 5 V DC
or 12 V DC on pin 9.
The Device Settings app allows you to configure the behavior
of the RS-232 port. To view the default configuration and make
adjustments, go to the Device Settings app > RS-232. The default
configuration for RS-232 is shown:
The following options can be edited to suit your application:
■ RS-232 port : When this is turned off, the RS-232 port powers
down. When this option is on, it powers up the RS-232
hardware. It then displays the assigned COM port number.
Note: If you do not have a device plugged into the RS-232
port, the port pins corrode more quickly when left powered
up. Use the setting to power down when it is not going to be
used.
Note: Power consumption during sleep is higher when the RS-
232 hardware is powered up.