OPB720A Datasheet, PDF (1/5 Pages) OPTEK Technologies – Long Distance Reflective Switch

Long Distance Reflective Switch
OPB720A and OPB720B Series
Features:
• 0.04” to 12” (1 mm to 305 mm) with 90% reflective material.
(Typical Maximum detection distance to be set at factory)
• Recognizes objects as small as 0.08” (2 mm)
• Ambient light rejection < 100K Lux
• Open collector output
• Cable length 39” (990 mm) lead length 28 AWG wire
Product Photo Here
Description:
The OPB720A and OPB720B Series reflective switches detects objects as far away as 12” (305 mm) using
standard 90% reflective material, and can detect objects as small as 0.08” (2 mm). The OPB720 series consist of
three standard reflective switching distances -06Z for typically 6” (152 mm), -12Z for typically 12” (305 mm) and
-30VZ for typically 30” (762 mm). The power supply voltage range of the OPB720A series is 10 to 30 volts while
the power supply voltage range for the OPB720B is 4 to 7 volts.
The OPA720A and OPB720B sensors are NOT affected by ambient light in most conditions. Ambient light
conditions are compensated by using a synchronous driver detection scheme.
This sensor has a logical output that switches from a high level with reflective target to a low level with no reflective
target. With the addition of hysteresis, the OPB720 series minimizes output switching oscillations. The type of
material used for the target is very dependent on the distance that can be achieved for the sensor. Taking this into
consideration, the OPB720 series can be used in either a reflective or interruptive mode. As an example, the
OPB720A-12Z can easily be used in a reflective mode for distances around 12” (305 mm) while when reflecting off
a retro-reflective target similar to 3M 3870 or Nippon Crystallite at distances around 85” (216 mm) the device
works well in the interruptive mode. See the included charts for typical distances with different reflective material
for other versions of the OPB720 series devices.
The OPB720 series has an open collector output transistor and power requirements are compatible with most
PLCs and TTL gates.
Applications:
• Conveyer belt package recognition
• Personnel movement recognition
• Near-focus security systems
• Hand wash and soap dispensing stations
• Toilet and urinal sensors
• Product dispensing systems
Vcc
Electronics
Output
Ground
Part Number
OPB720A-06Z
OPB720B-06Z
OPB720A-12Z
OPB720B-12Z
OPB720A-30VZ
OPB720B-30VZ
Ordering Information
Description
Maximum detection of 0.04” to 6” (1.0 mm to 152 mm)
39” (991 mm) lead length with 28 AWG wire, using white 90%
reflective paper
Maximum detection of 0.04” to 12” (1.0 mm to 305 mm)
39” (991 mm) lead length with 28 AWG wire, using white 90%
reflective paper
Maximum detection of 0.04” to 30” (1.0 mm to 762 mm)
39” (991 mm) lead length with 28 AWG wire, using white 90%
reflective paper
Additional laser safety information can be found
on the Optek website. See application #221.
Classification is not marked on the device due to
space limitations. See package outline for
centerline of optical radiance. Operating de-
vices beyond maximum rating may cause de-
vices to exceed rated classification
RoHS
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
OPTEK Technology Inc. — 1645 Wallace Drive, Carrollton, Texas 75006
Phone: [phone] or [phone]
FAX: [phone] [e-mail] www.optekinc.com
Issue F 07/07
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