SS2-00-4E Automation Direct, SS2-00-4E Datasheet - Page 4

• Manufacturer Part Number: SS2-00-4E
• Description: Photoelectric Sensor
• Manufacturer: Automation Direct

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Diffuse-reflection
proximity switch
With this type of device, the
emitter and receiver form part of
the same unit. The optical beams
are either parallel or slightly con-
verging. The presence of an object
in the optical field causes diffused
reflection of the luminous beam.
The receiver detects the reflection
from the object itself. The reflec-
tive properties of the object are
important. It is generally possible
to reliably detect the presence of
any object unless it is perfectly
reflective or black. Clear objects
with a reflective power of 90% are
detected close to the rated operat-
ing distance. Dark objects with
18% reflectivity are detected at
about half the normal operating
distance.
Retro-reflective
photoelectric
switch
The emitter and receiver form
part of the same unit. The optical
beams are parallel. The emitter’s
luminous beam hits a reflector
and is redirected toward the
receiver. Detection occurs when
the path of the beam is inter-
rupted by the presence of an
opaque object. Operating dis-
tance mainly depends on the
quality of the reflector used and
on the optical-beam angle.
Through-beam
photoelectric
switch
Emitter and receiver are housed
in two separate units and are
installed one in front of the other.
Detection occurs when the path
of the beam is interrupted by the
presence of an opaque object.
Section 11 — Sensors
Photoelectric Sensors Terminology
Polarized
retro-reflective
photoelectric
switch
This is a variant of the retro-
reflective photoswitch. A polariz-
ing filter is placed in the emitter’s
optical path. A polarizing filter in
the receiver is oriented at a right
angle to the filter in the emitter.
This results in the elimination of
reflections from surfaces other
than the reflector. The light from
the reflector possesses a compo-
nent that is strongly polarized in
a perpendicular direction to the
incident light. It becomes the only
recognizable
source.
Switching
element functions
Dark operate
Allows current to flow when the
path of the light beam is blocked
and will prevent flow when the
path of the light beam is not
blocked.
Light operate
Allows current to flow when the
path of the light beam is not
blocked and will prevent flow
when the path of the light beam is
blocked.
Make NO (normally open)
Causes load current to flow when
a target is detected and not to
flow when a target is not detected.
Break NC (normally closed)
causes load current to flow when
a target is detected and not to
flow when a target is not detected.
Toll-free orders 1-800-633-0405
reflected-light
Make-break or
complementary function:
A switching element combination
which contains one make func-
tion and one break function.
In order to establish a relation-
ship between the two different
modes, you must distinguish
between type D sensors (light dif-
fusion) and types R and T (light
reflection or transmission):
Type
Diffuse Reflective
Retro-reflective
Through-beam
Type of output and
load connection
Three-wire NPN
Two power supply wires and one
output
element is connected between
output and negative terminal.
When ON, the current is drawn
from load through the output ter-
minal. The other load terminal is
connected to the positive terminal
of the power supply.
Three-wire PNP
Two power supply wires and one
output
element is connected between
output and positive terminal.
When ON, the current is drawn
from positive pole and supplied to
the load through the output ter-
minal. The other load terminal is
connected to the negative termi-
nal of the power supply.
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wire.
wire.
Dark
operate
NC
NO
NO
The
The
Light
operate
NO
NC
NC
switching
switching
T