Page 552 - Sensors and Systems - North American Catalog
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Photoelectric Sensors,
Standard Sensors,
Fiber optic cables
2
.3
550
Germany: +49 621 776-4411
Refer to General Notes Relating to Product Information
Pepperl+Fuchs Group
USA: +1 330 486 0001
Singapore: +65 6779 9091
Copyright Pepperl+Fuchs
Photoelectric Sensors
Fiber optic cables
Fiber Optic Diffuse and
Thru-Beam Mode
In applications involving small targets or unfavorable
conditions, fiber optic cables may be the sensible solution.
Glass fiber optic cables are constructed from tiny strands
of glass that are bundled together inside an application-specific sheath.
Plastic fiber optic cables are manufactured from a light conductive plastic
monofilament material, which is protected by a PVC jacket.
When attached to the end of certain photoelectric sensors, they guide
the light through the cable and out at the sensing head. A separate fiber
attached to the receiver returns the light. Pepperl+Fuchs offers both
glass and plastic fiber optic cables. The diameter of the glass fiber optic
cables is generally larger than plastic and provides a longer sensing
range. Pepperl+Fuchs’ glass cables can withstand temperatures as
high as 900 °F while the plastic cables are rated as high as 221 °F. The
plastic cables are typically used due to their small size and narrow beam
diameter. This enables easy detection of small parts such as pins on an
IC chip. Plastic cables can be “cut-to-length” in the field; therefore, the
correct length doesn’t have to be specified when ordering. Obtaining the
maximum light intensity possible in each application is accomplished
by customizing the plastic cables to the shortest possible length.
This reduces the inherent “light losses” that occur inside the cable.
Pepperl+Fuchs offers three standard types of sheaths: stainless steel,
silicone, and PVC.
In diffuse mode sensing, a bifurcated cable (2 in 1) is used. Thru-beam
requires two individual cables.
Diffuse
Thru-Beam
Diffuse
Thru-Beam
Plastic Fibers
Glass Fibers
Mounting and Fitting
When positioning plastic fiber optic cable, a minimum
bending radius of 15 mm must be maintained. In addition, a
straight section of ≥15 mm must be maintained at both ends
of fiber optic cable between the threaded mounting cylinder
and optical sensor.
Some fiber optic cables have a flexible stainless
steel pickup attached. In such a case, a minimum
bending radius of 10 mm must be maintained. Also,
to avoid damage to the pickup head light guide, a
straight section of 10 mm must be maintained at both
ends.
Plastic
Fiber Optic Cable
Threaded Mounting
Cylinder
15 mm
15 mm
R 15 mm
R
Fiber Sensor
Plastic
Fiber Optic Cable
Threaded Mounting
Cylinder
10 mm
15 mm
R 15 mm
R
15 mm
10 mm
R
R
R 10 mm
Stainless Steel
Pickup Head
Fiber Sensor
Please Note!
Do not twist or kink
plastic fiber optic cables.
Avoid contact with
petroleum or organic solvents.
Excessive pulling will lead to
severe damage.
Switching current
max. 100 mA , resistive load
Voltage drop
2 V DC at 100 mA ;
0.7 V at 10 mA
Switching frequency
High speed mode: 16 kHz , Standard mode: 3 kHz , High resolution: 250 Hz ~ 3 kHz (selection by
the sensor), Automatic: 250 Hz , Glass mode: 250 Hz
Timer function
ON-delay, OFF-delay, one shot, pulse extension ; adjustable 0 ... 999 ms in 1 ms increments
Ambient temperature
-10 ... 55 °C (14 ... 131 °F)
Protection degree
IP50
Connection
2 m fixed cable , 1 x 0.25 mm² , PVC
2 m PVC cable, 4 x 0,14 mm
²
Housing
PC
Standards
EN 60947-5-2
Approvals
CE, cULus Listed 57M3 (Only in association with UL Class 2 power supply; Type 1 enclosure)
Photographs
Introduction to Fiber Optic Cables
