Panasonic EQ-500 User Manual
EQ-500
08/2005
SERIES
ADJUSTABLE RANGE REFLECTIVE
Multi-voltage Amplifier Built-in
PHOTOELECTRIC SENSOR
Long sensing range 2.5 m
Multi-voltage Not affected by background objects
Because it can function with 24 to 240 V AC and 12 to 240 V
DC, almost any power supply anywhere in the world will do.
Introducing the new DC-voltage type
equipped with BGS / FGS function
We’ve added a DC-voltage type with NPN and PNP
transistor outputs all in one sensor. Its BGS / FGS function
controls any background effects for more stable sensing.
EQ50
Because the sensor doesn’t detect objects outside the preset
sensing field by using the 2-segment photodiode adjustable
range system, it will not malfunction even if someone walks
behind the sensing object or machines or conveyors are in
the background.
EQ51
Impervious to variations color or angle
Due to its advanced optical system, the sensor is not affected
by variations in the object’s angle or gloss compared to
conventional sensors.
Moreover, as the difference in sensing range between black
and white varies by only approx. 5 % (Note), sensing can be
performed at a somewhat constant distance even if the
sensing object is black or white.
Refer to p.196 for the BGS / FGS functions.
194
Note: Example of the difference in sensing range between
black non-glossy paper (Lightness: 5) and white nonglossy paper when the setting distance is set at 2 m
6.562 ft.
Introducing the 1 m 3.281 ft sensing range type!
r
08/2005
EQ-500
Convenient timer function
models
Types with an ON-delay / OFF-delay
timer available.
OFF-delay, e.g. useful when the
response of the connected device is
slow, ON-delay, e.g. useful to detect
objects that take a long time to move.
• Operation: ON-delay, OFF-delay
• Timer period: 0.1 to 5 sec.
(individual setting possible)
An easy to set adjuster with
indicator
Equipped with a 2-turn adjuster with
indicator, making it easy to set for
short or long distances.
Distance adjuster
(2-turn)
ON-delay timer
adjuster (Note)
Adjuster
indicator
OFF-delay timer
adjuster (Note)
Stable sensing even in harsh environments prone to water or dust.
Little affected by
contamination on lens
Even if the lens surface gets somewhat
dirty from dust particles, there is very
little change in the operation field,
rendering stable and consistent
detection even for objects appearing
close to the front surface of the unit.
Convenient terminal block
type
Cabling enabled by way of a terminal
block that eliminates waste.
Terminal block
Conduit connecto
Waterproof
IP67 protection permits use in
environments where water may splash.
APPLICATIONS
Level check within the hopper
The distance to
the object can be
set to enable
residual amount
sensing in the
hopper regardless of color.
Confirmation of the passage of
packages on a conveyor belt
Can accurately detect packages even if
they vary in size and color.
195
EQ-500
Setting distance
Background
Light received at
element A
Element A
Object
Moving object
in the back
Element B
ONOFF
Light received at element
B or light not received
Conveyor Conveyor Conveyor
Light received
at element A
Light is not received at
element B, so an object
is judged to be present
Light received at element B
Element A
Lens
Emitting
element
For glossy
object
Object presentObject absent
OFF in this condition only ON in all other conditions
ON ONOFF
Element B
Setting
distance
A conveyor or other
background must be present.
08/2005
BGS / FGS FUNCTIONS MAKE EVEN THE MOST CHALLENGING SETTINGS POSSIBLE!
The BGS function is best suited for the following case
Background not present
When object and background are
separated
BGS (Background suppression) function
The sensor judges that an object is present when light is received at position A of
the light-receiving element (2-segment element). This is useful if the object and
background are far apart. Not affected if the background color changes or
someone passes behind the conveyor.
The FGS function is best suited for the following case
Background present
FGS (Foreground suppression) function
When object and background are close
together
When the object is glossy or uneven
196
The sensor judges that no object is present when light is received at position B of
the light receiving element (2-segment element)(The conveyor is detected). This
function is useful if the object and the background are close together or if the
object is glossy or uneven. However, sensing is impossible if there is no
background (conveyor, etc.)..
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