Distributor of Digi International: Excellent Integrated System Limited
Datasheet of 301-1141-01 - WATCHPORT TEMP SENSOR
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Watchport Installation Guide (90000406 Rev. H) – Page 12
Watchport/P (Proximity Sensor)
The Watchport/P uses an RS-232 modem signal interface. The sensor acts as a ‘proximity’ detector; that is,
if an object comes within range, the sensor will raise (and then lower) its DSR signal. The Watchport/P
detects the presence of objects within a user-selectable range of 0.5 to 1.5 meters (1.64 to 4.9 feet) of the
device and can give a reading as frequently as 100 times per second. If using the Watchport Manager, the
sensor defaults to 1 read per 3 seconds
.
Watchport/P Panel Description
To access the panel, pull tab out and lift up cover. Push firmly to close.
Red LED
This light indicates that the sensor is receiving some reflection of its signal but not
enough to trigger the amber light. A persistent red light may mean that the sensor needs
service. DSR is unaffected.
Amber LED
This light triggers the sensor. DSR goes high, so a message is sent.
PNP switch
This is the default setting. Watchport/P functions only with PNP selected.
NPN switch
This setting is not used.
L. ON switch
This is the default setting. DSR goes high when something comes within proximity of
the sensor.
D. ON switch
This setting changes the sensor so that DSR goes high when something is NOT within
proximity of the sensor.
SENS. knob
Adjust potentiometer with a small screwdriver. Adjusting higher (H) will increase
sensitivity, lower (L) will lower sensitivity.
Watchport/P Commands
Command
Description
Return Value
?<CR>
Tells about the command set available for this Watchport.
as described in this section
I<CR>
Tells what kind of Watchport is connected.
Watchport/P<CR>
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