Panasonic EQ-501, EQ-501T, EQ-502, EQ-502T, EQ-511 Specification Sheet

EQ-500

ADJUSTABLE RANGE REFLECTIVE
PHOTOELECTRIC SENSOR

Long sensing range 2.5 m

194

SERIES

Multi-voltage Amplifier Built-in

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.

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.

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.

EQ50

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.

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.

Refer to p.196 for the BGS / FGS functions.

EQ51

195

EQ-500

Convenient terminal block
type

Cabling enabled by way of a terminal
block that eliminates waste.

Convenient timer function
models

An easy to set adjuster with
indicator

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)

Equipped with a 2-turn adjuster with
indicator, making it easy to set for
short or long distances.

Introducing the 1 m 3.281 ft sensing range type!

Confirmation of the passage of
packages on a conveyor belt

Can accurately detect packages even if
they vary in size and color.

Little affected by
contamination on lens

Level check within the hopper

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.

Waterproof

IP67 protection permits use in
environments where water may splash.

The distance to
the object can be
set to enable
residual amount
sensing in the
hopper regard­less of color.

Stable sensing even in harsh environments prone to water or dust.

APPLICATIONS

Conduit connecto

r

Adjuster
indicator

ON-delay timer
adjuster (Note)

OFF-delay timer
adjuster (Note)

Distance adjuster
(2-turn)

Terminal block

196

EQ-500

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.

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

The FGS function is best suited for the following case

Background present

When object and background are close
together
When the object is glossy or uneven

FGS (Foreground suppression) function

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.)..

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.