Ultrasonic Slot Sensor


Manufacturer Part NumberSLM50B6
DescriptionUltrasonic Slot Sensor
TypeOpposed Mode
SLM50B6 datasheets

Specifications of SLM50B6

Sensing Range Min1.2mmSensing Range Max50mm
Operating Temperature Range-20°C To +60°CSupply Voltage30VDC
Body MaterialDie-cast ZincSensor TerminalsCable
Current, Switching100 mAFunctionVane
Ip RatingIP67OutputNPN/PNP
Primary TypePhotoelectricRange, Measurement50 mm
Sensing ModeOpposedTechnologyPhotoelectric
Termination4-Wire CableVoltage, Supply30 VDC
Accessories AvailableCordsetsContact Rating25 MA
Sensor OutputNPN/PNPSensor Body MaterialDie-cast Zinc
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SLM Series Slot Sensors
The SLM Series Slot Sensor (sometimes called a “fork sensor”) comprises an opposed-
mode emitter and its receiver inside a single convenient housing. Opposed-mode sensing
is very reliable, and the single, self-contained housing provides easy installation, with
no sensor alignment required. In addition, molded-in arrows on the housing show at a
glance the position of the beam, simplifying installation placement.
Applications include counting, gear tooth detection, edge detection, part sensing on
conveyor rails and belts, position and orientation verification, dimension verification,
tool break monitoring, and level monitoring.
Output LED (Yellow)
Mounting Holes
(all models)
Mounting Hole
(all models
except SLM10.. and
Beam Position
Figure 1. SLM Series features
Sensor Configuration
NOTE: For best results, objects to be detected should be placed midway between the
emitter and receiver.
Sensitivity Adjustment
The sensor’s sensitivity is adjusted by turning the 270-degree-turn Sensitivity
potentiometer with a small flat-blade screwdriver. Apply power to the sensor and turn the
potentiometer all the way clockwise (max. gain). If the object to be sensed does not block
the beam at max. gain, turn the gain down a little at a time, testing with the object, until
the object can be sensed with reliability.
If adjusting the sensitivity with the potentiometer does not provide reliable object
detection, investigate alternative sensing methods.
Light/Dark Operate Select
Select Dark Operate (D.O.) or Light Operate (L.O.) by turning the DO/LO selector switch
to the desired setting using a small flat-blade screwdriver. If D.O. is selected, the output
conducts when the receiver element does not see the emitted light (object is present). If
L.O. is selected, the output conducts when the receiver element sees the emitted light
(object is absent).
P/N 122703 rev. D
Power ON LED (Green)
Dark/Light Operate Select Switch
Sensitivity Potentiometer
Receiver Aperture
Emitter Aperture
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: 763.544.3164