Juniper Systems Allegro CX Manual - Manual (Page 48)

48 Allegro CX Owner’s Manual
Connecting Sensors to COM1
Pin 4 (DTR) on COM1 supplies up to 200 mA at +5 volts to power
bar code scanners, external GPS receivers, and other sensors. This
signal (DTR) must be set high by the application to take advantage
of this feature. When the DTR signal goes low, the output is -5 volts.
Insure that the device connected to the DTR line can accept negative
voltages or is protected against them (standard RS-232 signal levels).
Infrared Communication Port
The infrared wireless communication port (IrDA) located on the top
of the Allegro case allows you to send data to a printer or another
computer with an IrDA port without the need for a cable. The IrDA
port adheres to the Infrared Data Association Standards. The infrared
COM port runs at the speed of 115 kbps.
< IrDA Port
The IrDA port is used to connect the Allegro and a desktop or laptop
computer together to run ActiveSync, which allows you to transfer
and copy fi les between the computers and manage the Allegro fi les
remotely. Files can be sent from the Allegro directly to a printer with
an IrDA port from programs that have printing capabilities built-in,
such as Pocket Word.
The Allegro and the other device communicating with it via an
IrDA port need to be placed less than half a meter apart with their
infrared ports aimed directly at each other (within 15 degrees in any
direction).
USB Communication Port
The USB communication port located on the base of the Allegro case
allows you to send data to a desktop PC with a USB connection.
The USB port runs at standard USB speed (12 mbps) and is used for
ActiveSync connections only.
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