d12-ep6-fv Banner Engineering Corp., d12-ep6-fv Datasheet - Page 2

• Manufacturer Part Number: d12-ep6-fv
• Description: Series D12 Expert With Automatic Sensitivity Adjustment
• Manufacturer: Banner Engineering Corp.

Series D12 Expert
with automatic
sensitivity adjustment
Sensor for glass- or plastic
fibre-optics
Automatic sensitivity adjustment
with external switch or PLC
Extremely high excess gain,
but also reliable detection of low
sensing contrast
Switching frequency 2500 Hz
Visible red light
Switchable off-delay and
light-/dark operation
7-segment LED bargraph display
for excess gain and sensing
contrast indication
Alarm output indicating low excess
gain
DIN-rail mounting
By the simple push of a button, the D12
Expert adapts itself to each specific
sensing application. A microprocessor is
used in the programming of the switch
point and hysteresis. This makes the D12
Expert the ideal sensor for low contrast
applications and applications that require
extremely high excess gain.
The programming of the D12 Expert is
very simple yet secure. The user accesses
the program mode by a sequence of
holding and clicking the push-button. The
user then presents the two detection
conditions. In each condition, the button is
pressed once and the sensor then
automatically finds the optimum switching
point and contrast. Immediately after
programming, the sensing contrast is
displayed by the flashing three times of
between one to seven LED’s. This allows
the user to assess during installation how
reliable the sensor will be during actual
operation. Three or more LED’s flashing
(moderate contrast) is recommended for
harsh industrial environments. However,
low sensing contrast can often be
improved by changing the distance
between the sensor and the object or by
repositioning the sensor. Sensing contrast
should be high (6+ LED’s) under very harsh
environmental or changing conditions (i.e.,
sensor to object distance). The sensor
retains its programming even with power
removed until reprogrammed.
During operation a 7-segment LED
bargraph provides an accurate display of
the excess gain. Immediately after
programming, the excess gain should be
high enough to compensate for signal loss
due to the gradual contamination of the
lens that is likely to occur in any application.
During operation, the 7-segment bargraph
continuously provides an indication of the
gradual decrease in excess gain. An alarm
indicator LED and an alarm output give
warning of a marginal sensing condition
before the sensor actually fails.
D12 Expert applications
Sensing of the perforations in a continuous web of
clear plastic bags.
Determination if a surface mount IC is improperly
placed in a plastic pocket.
A remote programming wire allows
programming with an external switch or
PLC. This allows a PLC to adapt the
sensor automatically to the actual sensing
conditions such as changing the sensing
object.
As well as adjustment of the switching
point, the programming button of the D12
Expert also allows you to toggle between
either “no delay” or a 40 millisecond pulse
stretcher and between light and dark
operate.