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through beam sensor Autonics BW20-12P with 7 meter sensing range and mutual interference prevention

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through beam sensor Autonics BW20-12P with 7 meter sensing range and mutual interference prevention

Description : Accelerometers RoHS

Mfr. Part # : BW20-12P

Model Number : BW20-12P

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Product Overview

The D-44 BW Series Area Sensor is a high-performance through-beam type sensor designed for long-distance detection up to 7 meters. It offers a wide range of models with varying optical axis pitches (20mm and 40mm) and sensing heights (120mm to 940mm), minimizing unsensing areas with its 20mm pitch option. Featuring high-brightness LEDs for easy recognition from multiple angles and distances, this sensor includes essential functions like self-diagnosis, mutual interference prevention, and external diagnosis. Its robust IP65 protection structure ensures reliability in demanding industrial environments.

Product Attributes

Brand: Autonics (implied by page numbering and context)
Protection Structure: IP65 (IEC standard)
Material: Case: aluminum, Front cover, sensing part: acrylic
Light Source: Infrared LED (850nm modulated)
Cable: 5mm, 4-wire, 300mm, M12 connector
Accessories: Bracket A (4), Bracket B (4), Bolt (8)

Technical Specifications

Model	BW20- (P)	BW40- (P)
Sensing method	Through-beam type
Sensing distance	0.1 to 7m
Min. sensing target	Opaque material of min. 30mm	Opaque material of min. 50mm
Optical axis pitch	20mm	40mm
Number of optical axis	8 to 48	4 to 24
Sensing height	140 to 940mm	120 to 920mm
Response time	Max. 10ms
Power supply	12-24VDC 10% (ripple P-P: max. 10%)
Current consumption	Emitter: max. 120mA, Receiver: max. 120mA
Operation mode	Light ON fixed
Control output	NPN or PNP open collector output Load voltage: max. 30VDC Load current: max. 100mA Residual voltage - NPN: max. 1VDC, PNP: max. 2.5VDC
Protection circuit	Reverse polarity protection circuit, output short over current protection circuit
Insulation resistance	Over 20M (at 500VDC megger)
Synchronization type	Timing method by synchronous line
Self-diagnosis	Emitter/Receiver monitoring, direct light monitoring, over current monitoring
Interference protection	Interference protection by master/slave function
Noise immunity	240V the square wave noise (pulse width 1) by the noise simulator
Dielectric strength	1,000VAC 50/60Hz for 1 min
Vibration	1.5mm amplitude at frequency of 10 to 55Hz (for 1 min) in each X, Y, Z direction for 2 hours
Shock	500m/s (approx. 50G) in each X, Y, Z direction for 3 times
Environment Ambient illumination	Ambient light: max. 100,000lx (receiver illumination)
Environment Ambient temperature	-10 to 55, storage: -20 to 60
Environment Ambient humidity	35 to 85%RH, storage: 35 to 85%RH
Weight1 (unit only)	Approx. 1.4kg	Approx. 1.4kg

Ordering Information

Item	Optical axis pitch	Number of optical axis	Control output
BW	20mm (20) or 40mm (40)	04 to 48	NPN open collector output (No mark) or PNP open collector output (P)

Example: BW2008P (BW Series, 20mm pitch, 8 optical axes, PNP output)

Dimensions

(Diagrams for Emitter, Receiver, Bracket A, Bracket B, and overall dimensions are present in the source but cannot be rendered as text. Key dimensions are listed below based on model examples.)

BW20-08(P): L=160mm
BW40-04(P): L=160mm
BW20-48(P): L=960mm
BW40-24(P): L=960mm
Overall width (Emitter/Receiver): Approx. 26.6mm
Overall height (Emitter/Receiver): Approx. 28.6mm
Depth (Emitter/Receiver): Approx. 22.6mm

Wiring and Connections

Input/Output Circuit and Connections

Emitter & Receiver: 4-pin M12 connector
Main Circuit: Brown (+V), White (SYNC), Blue (0V), Black (TEST/M/S)
Control Output: NPN or PNP open collector output

Connecting Cable (sold separately)

Emitter: CID4-xT (3m, 5m, 7m, 10m, 15m)
Receiver: CID4-xR (3m, 5m, 7m, 10m, 15m)

Operation Indicator

Emitter: Green (POWER), Red (TEST/M/S)
Receiver: Green (POWER), Yellow (Unstable light ON), Red (Stable light OFF)

Functions & Features

Self-diagnosis: Emitter/Receiver monitoring, direct light monitoring, over current monitoring. Control output turns OFF upon error, indicated by the operation indicator.
Interference Protection: Master/Slave function to prevent sensing errors when multiple sensors are used in parallel.
External Diagnosis: Emitting stops when TEST input (black wire) is 0V, allowing external systems to check sensor operation.
Minimizes Unsensing Area: Achieved with a 20mm optical axis pitch (BW20- models).
High Brightness LED: Emitter and Receiver LEDs ensure easy recognition from side, front, and long distances.

Troubleshooting

Cause	Troubleshooting
Not operating	Power supply: Supply the rated power. Incorrect cable connection or disconnection: Check the wiring. Rated connection failure: Use it within rated sensing distance.
Not operating sometimes	Pollution by dirt of sensor cover: Remove dirt by soft brush or cloth. Connector connection failure: Check the assembled part of the connector.
Control output is OFF even though there is no target object.	Out of rated sensing distance: Use within the rated sensing distance. There is an obstacle to cut off the light emitted between emitter and receiver: Remove the obstacle. There is a strong electric wave or noise generated by motor, electric generator, high voltage line etc.: Put away the strong electric wave or noise generator.
LED displays for break of light emitting element	Break of light emitting element
LED displays for failure of emitter	Break of light emitting circuit
LED displays for failure of receiver	Break of light receiving element
LED displays for synchronous line	Synchronous line incorrect connection or disconnection: Check the wiring. Break of synchronous circuit of emitter or receiver.
LED displays for control output over current	Control output line is shorten: Check the wiring. Over load: Check the rated load capacity.
LED displays for emitter malfunction	Emitter malfunction. Treat after checking the emitter display LED.

Proper Usage

Follow instructions in 'Proper Usage'. Otherwise, it may cause unexpected accidents.
12-24VDC power supply should be insulated and limited voltage/current or Class 2, SELV power supply device.
Use the product 1 sec after supplying power. When using separate power supply for the sensor and load, supply power to sensor first.
When using switching mode power supply to supply the power, ground F.G. terminal and connect a condenser between 0V and F.G. terminal to remove noise.
When connecting a DC relay or other inductive load, remove surge by using diodes or varistors.
Wire as short as possible and keep away from high voltage lines or power lines, to prevent surge and inductive noise.
This unit may be used in the following environments: Indoors (in the environment condition rated in 'Specifications') Altitude max. 2,000m Pollution degree 2 Installation category II

2411220420_Autonics-BW20-12P_C17567089.pdf

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