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Reflex Sensor with Background Suppression HT77PA3

Features at a Glance

Triple beam correction principle
Infrared light
Plug can be rotated
Adjustable time delay

HT77PA3 Reflex Sensor with Background Suppression

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These sensors detect distance by measuring angles. They are particularly good at recognizing objects in front of any background. The color, shape and surface characteristics of the object have practically no influence on sensor switching performance.

Features at a Glance

Triple beam correction principle
Infrared light
Plug can be rotated
Adjustable time delay

Technical data

Optical Data
Range	1,500mm
Setting Range	300 ... 1,500mm
Switching Hysteresis	< 5%
Light Source	Infrared Light
Service Life (T = +25 °C)	100,000h
Risk Group (EN 62471)	1
Max. Ambient Light	10,000Lux

Electrical Data
Supply Voltage	10 ... 30V DC
Current Consumption (Ub = 24 V)	40mA
Switching Frequency	300Hz
Response Time	1,700µs
Off-Delay	0 ... 1s
Temperature Drift	< 5%
Temperature Range	-25 ... 60°C
Switching Output Voltage Drop	< 2.5V
PNP Switching Output/Switching Current	200mA
Short Circuit Protection	yes
Reverse Polarity Protection	yes
Overload Protection	yes
Protection Class	III

Mechanical Data
Setting Method	Potentiometer
Housing Material	Plastic, PBT
Degree of Protection	IP67
Connection	M12 × 1; 4-pin
Weight	126g

General Data
Scope of delivery	1 × BEF-SET-03 mounting set 1 × initial start-up instructions 1 × sensor

Output
PNP NC, PNP NO	yes

Adjustable parameters
Circuit	NC NC+NO NO
All other parameters can be found in the product documentation.

Standards and certificates

Table 1
Detection Range	300 mm	800 mm	1500 mm
Light Spot Diameter	6 mm	18 mm	30 mm

Connection Diagram

Switching Distance Deviation
Typical characteristic curve based on white, 90 % remission Sr = Switching Distance dSr = Switching Distance Change black 6 % remission grey 18 % remission