Rockwell Automation 45FVL Digital Self-Teaching Fiber Optic - Manual (Page 3)

3
Installing the Fiber Optic Cables
S
Push down the locking lever
S
Insert fiber all the way
S
Lift locking lever to lock fiber in
place
Maximum fiber insertion length is
13mm
For installation of smaller fiber
optic cables with jacket
diameters of 0.05mm (1.25in)
adaptors are provided for easy
installation.
Wiring the Sensor
Choice of Power Bus, 2m (6.5ft) cable, or 4 pin pico QD
connector are provided for wiring the 45FVL Series sensors.
On the pico QD models Rockwell Automation/Allen-Bradley
recommends the use of the 889 Series cordsets and
patchcords (i.e., 889P–F4AB–2). Standard 2m (6.5ft) cable
lengths are provided with flying leads for hard wiring. Hard
wiring color coding and pin assignment for QD connectors are
as specified below.
Designation
Lead Color
2m (6.5ft) Cable
Pin Assignment
4 Pin Pico QD
Termination
1
4
3 2
V+ Brown 1
0V Blue 3
Output Black 4
The Power Bus option utilizes PB quick disconnect cordsets
which are prewired with up to four conductors. When ganging
sensors with the Power Bus option a three conductor cordset
is wired to one sensor to provide power to all ganged units.
The remaining ganged units use a single conductor cordset
for wiring an output. This option eliminates two conductors per
ganged unit (see below).
_
+
_
+
Maximum number of
units paralleled: 16
Female
End Cap
Male
End Cap
Brown
+ V
- V
Blue
Black
Output
Black
Output
Black
Output
NPN Output
Brown
Black
Blue
Load
+
+ -
-
PNP Output
Brown
Black
Blue
Load
+
+ -
-
Configuring and Using the Sensor
This section will run through the basics on how to operate
your new 45FVL Series sensor. After connecting power, load,
and fiber optic cables the next step is to choose one of two
available options for your Display Mode: Absolute Sensing
Mode or Relative Sensing Mode.
Absolute Sensing Mode measures the absolute value of a
target’s reflected light at that moment represented in a four-
digit value ranging from 0 to 1023. Depending on the
reflectivity of the target 1 of 8 sensitivity level settings (with
1023 bits of resolution) is automatically chosen by the sensor
when target is taught. A “1,” representing the lowest sensitivity
level, would be displayed for a highly reflective target. A “8,”
representing the highest sensitivity, would be displayed for
dull, less reflective targets (see following diagram).
Sensitivity Level (Absolute sensing mode)
Incoming Light Level shown in 4 digits
Min = 0 Max = 1023
Relative Sensing Mode monitors and displays the variation
of light received relative to the standard value at which it was
learned. In this mode the sensor measures and learns the
level of light reflected from a target. However, this value is
registered as “0” on the display when target is taught and all
subsequent measurements are relative to that standard value
+/– 1023 bits.
This mode is beneficial in applications to obtain the detailed
light attenuation rate due to soil/damage on the fiber end. See
diagram below.
Relative Incoming Light
Min = -1023 Max = +1023
Relative Sensing Mode
Setting Indication Mode
S
Slide set switch to SET. Note flashing “T” on display.
S
Pushing and releasing the BLACK button will change the
display to alternately switch between Absolute Sensing or
Relative Sensing Mode (see above).