The OPB720A and OPB720B Series reecve switches detects objects as far away as 12” (305 mm) using standard 90%
reecve material, and can detect objects as small as 0.08” (2 mm). The OPB720 series consist of three standard reecve
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 aected by ambient light in most condions. Ambient light condions are
compensated by using a synchronous driver detecon scheme.
This sensor has a logical output that switches from a high level with reecve target to a low level with no reecve target.
With the addion of hysteresis, the OPB720 series minimizes output switching oscillaons. The type of material used for
the target is very dependent on the distance that can be achieved for the sensor. Taking this into consideraon, the
OPB720 series can be used in either a reecve or interrupve mode. As an example, the OPB720A-12Z can easily be used
in a reecve mode for distances around 12” (305 mm) while when reecng o a retro-reecve target similar to 3M 3870
or Nippon Crystallite at distances around 85” (216 mm) the device works well in the interrupve mode. See the included
charts for typical distances with dierent reecve material for other versions of the OPB720 series devices.
The OPB720 series has an open collector output transistor and power requirements are compable with most PLCs and TTL
gates.
Conveyer belt package recognion
Personnel movement recognion
Near-focus security systems
Hand wash and soap dispensing staons
Toilet and urinal sensors
Product dispensing systems
0.04” to 12” (1 mm to 305 mm) with 90% reecve material. (Typical
Maximum detecon distance to be set at factory)
Recognizes objects as small as 0.08” (2 mm)
Ambient light rejecon < 100K Lux
Open collector output
Cable length 39” (990 mm) lead length 28 AWG wire
Electronics
Vcc
Output
Ground
Ordering Informaon
Part Number Descripon
OPB720A-06Z
OPB720B-06Z
Maximum detecon of 0.04” to 6” (1.0 mm to 152 mm)
39” (991 mm) lead length with 28 AWG wire, using white 90%
reecve paper
OPB720A-12Z
OPB720B-12Z
Maximum detecon of 0.04” to 12” (1.0 mm to 305 mm)
39” (991 mm) lead length with 28 AWG wire, using white 90%
reecve paper
OPB720A-30VZ
OPB720B-30VZ
Maximum detecon of 0.04” to 30” (1.0 mm to 762 mm)
39” (991 mm) lead length with 28 AWG wire, using white 90%
reecve paper
Addional laser safety informaon can be found
on the Optek website. See applicaon #221.
Classicaon is not marked on the device due to
space limitaons. See package outline for
centerline of opcal radiance. Operang devic-
es beyond maximum rang may cause devices
OPB720A-30VZ & OPB720B-30VZ ONLY
RoHS