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The Cutler-Hammer® Comet Series is a
complete line of high performance, 18 mm
tubular sensors with a variety of models and
modes to solve virtually any sensing problem.
The sensors are available in thrubeam,reflex,
polarized reflex, diffuse reflective, focused
diffuse reflective, wide angle diffuse reflective,
Perfect Prox®, fine spot Perfect Prox and fiber
optic sensing.
Perfect Prox is one of the most powerful
problem-solving sensors available. These
sensors can reliably detect targets of different
color, reflectance, contrast or surface shape
at the same range, while ignoring background
objects just a fraction of an inch away.
The Comet Series includes AC/DC and
DC-only models with, 3- and 4-wire circuitry.
Choose from cable or microconnector.
Each sensor features a light/dark operation
switch and a gain control to provide for
quick adjustment to peak optical
performance. The unique threaded body with
flat sides allows quick mounting in a 3.4" hole
or against any flat surface. Internal
components are rigidly sealed in a solid
encapsulated package for excellent
performance in high vibration and highshock
applications.
SPECIFICATIONS
Input Voltage AC/DC Models:
AC Operation: 20 to 264 Vac, 50/60 Hz
DC Operation: 15 to 30 Vdc [15 to 24 Vdc above 155°C (31°F)]
Input Voltage DC-Only Models: 10 to 30 Vdc, [10 to 24 Vdc above 55°C (131°F)]
Power Dissipation:
AC/DC Models: 1.5 W maximum
DC-Only Models: 1 W maximum
Output Type:
AC/DC Models–AC Operation: VMOS (bi-directional)
AC/DC Models–DC Operation: NPN (sink)
DC Only Models: NPN and PNP (dual outputs)
Current Switching:
AC/DC Models: 300 mA max
DC Only Models:
PNP: 100 mA max
NPN: 250 mA maximum [NPN: 120 mA maximum above 55°C (131°F)]
Voltage Switching:
AC/DC Models: 375V peak maximum
DC Only Models: 30 Vdc maximum
Off-State Leakage:
AC/DC Models: 250 µA typical; 500 µA maximum
DC Only Models: 10 µA maximum
Surge Current:
AC/DC Models: 2 A maximum
DC Only Models: 1 A maximum
On-State Voltage Drop:
AC/DC Models – AC Operation: n/a
AC/DC Models – DC Operation: 1.8V at 10 mA; 3.5V at 300 mA
DC Only Models:
NPN: 400 mV at 10 mA, 1.5V at 250 mA;
PNP: 2.4V at 100 mA
Response Time:
AC/DC Models: 10 mS
DC Only Models: 1 mS; 3.5 mS (thru-beam)
Short Circuit Protection:
AC/DC Models: Sensor will turn off immediately when short or overload is detected (Indicator LED flashes). Turn power OFF and back ON to reset.
IMPORTANT: During installation, correct power connections must be made first to ensure fail-safe short circuit protection of outputs. DC–Only Models: Sensor will turn off immediately when short or overload is detected (indicator LED flashes). Sensor will reset when short is removed.
Temperature Range:
Thru-Beam Source: -20 to 70° C (-4 to 158°F)
All Others: -40 to 70°C (-40 to 158°F)
Light/Dark Operation: Switch selectable
Enclosure Material: Lens: polycarbonate;
Cable jacket: PVC; Body: structural polyurethane foam (do not expose to concentrated acids, alcohols or ketones)
Cable/Connector:
Cable Versions: 6' cable
Connector Versions: Male mini and micro connectors (refer to wiring diagrams for number of pins per model) on nominal 8" pigtails
Vibration and Shock:
Vibration: 30g over 10 Hz to 2 kHz
Shock: 100g for 3 mS 1.2 sine wave pulse
Indicator LED: Lights steady when output is ON; flashes when short circuit protection is in latch condition
Sunlight Immunity:
Perfect Prox: 5000 foot-candles
All Others: 10,000 foot-candles
Enclosure Ratings: NEMA 1, 2, 3, 4, 4X,6, 12 and 13 NEMA 6P models available.contact factory
Approvals: UL and C-UL recognized (all models), CE compliant
Note: These products conform to NEMA
tests as indicated, however, some severe
washdown applications can exceed these
NEMA test specifications.
SENSING MODES
Thru-Beam
Separate light source and detector units face
one another across an area. The column of
light traveling in a straight line between the
two lenses is the effective sensing beam. An
object crossing the path has to completely
block the beam to be detected.
Polarized Reflex
The source and detector are positioned
parallel to each other on the same side of the
object to be detected. Another element,
called a retroreflector, is placed across from
the source and detector. The sensing beam
is reflected from a retroreflector back to the
sensor. The Comet Series includes polarized
models with 3-wire and 4-wire circuits.
Right-angle models are also available.
Models feature a polarizing filter built into
the sensor to ensure that only light reflected
from a corner-cube retrore-flector is
recognized by the sensor. This allows
reliable detection of shiny targets that could
reflect light and be missed by a nonpolarized
sensor. Most models include a
visible sensing beam for easy installation
and alignment.
Diffuse Reflective
The source and detector are positioned on
the same side of the target. The two
components are aligned so that their fields
of view cross. When the target moves into
the area, light from the source is reflected off
the target surface back to the detector. A
retroreflector is not required. Forward and
right-angle viewing configurations offer
identical optical performance in this series.
Perfect Prox®
This is a unique type of diffuse reflective
sensor that combines extremely high
sensing power (called “excess gain”) with a
sharp optical cutoff to ignore backgrounds.
This allows the sensor to reliably detect
targets regardless of variations in color,
reflectance, contrast or surface shape, while
ignoring objects that are just slightly outside
the target range. This gives the Perfect Prox®
an outstanding ability to solve sensing
applications that would be difficult or
impossible to manage with other types of
sensors. It also makes Perfect Prox® one of
the easiest photoelectric sensors to set up
and use.
Eaton’s Comet Series includes more
background rejection models than any other
family on the market. Choose from forward
or right-angle viewing, 3- or 4-wire circuits,
cable, micro or mini-connector terminations
and a variety of sensing ranges.
Fiber Optic
The Comet Series also includes sensors that
utilize fiber optic cables to sense objects
where space is restricted, temperatures are
high, or tight viewing angles are required.
Choose from models that accept low cost
plastic fiber optic cables, or use our patented
glass fiber optic adapter that inexpensively
converts our standard diffuse reflective
sensors for use with durable glass fiber optic
cables.
Mounting
Comet Series sensors feature a threaded
housing and include two jam nuts and
washers for mounting into any
19 mm (0.75") hole or a selection of
accessory mounting brackets available from
Eaton. The flat sides of the sensor feature
two mounting holes for easily attaching the
sensor to any flat surface with #4 hardware.
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