Juniper Systems Allegro DOS Manual User Manual
Page 55
Hardware Features Page 2-37
Connecting Sensors to COM1
Pin 4 (DTR) on COM1 supplies up to 200 mA at +5 volts to power bar
code scanners 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
➫
➫
➫
➫
➫
W
W
W
W
W
IIIIIN
N
N
N
N
c
c
c
c
c
EEEEE
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 communication
speed is 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 files between the computers and manage the Allegro files
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 IrDA port on the bottom of the case is for use with an optional
docking cradle.
Setting up Communication
In Windows CE, the communication port is set up from the Control
Panel|Communication Properties. In DOS, use the FileScout
function. For details about setting up communication between the
Allegro and another computer or device, refer to Section 4, Windows CE
Operating System, Windows CE File Transfer Programs or Section 5, DOS
Operating System, Setting up Communication.
The Allegro and the other device communicating with it via an IrDA
port need to be placed less than one meter apart with their infrared
ports aimed right at each other (within 15 degrees in any direction).