Autonics BW Series Product Manual - Page 3

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Specifications

Model

BW20-□(P)

Sensing method

Through-beam

Light source

Infrared LED (850 nm modulated light)

Sensing distance

0.1 to 7.0 m

Sensing target

Opaque material

Min. sensing target ≥ Ø 30 mm

Number of

8 to 48

optical axes

Sensing height

140 to 940 mm

Optical axis pitch

20 mm

Response time

≤ 10 ms

Operation mode

Light ON

Functions

Emitter OFF (external diagnosis), self-diagnosis

Interference

Interference protection by MASTER / SLAVE function

protection

Synchronization type Timing method by synchronous line

Emitter: Operation indicator (green, red),

Indicator

receiver: Operation indicator (red, yellow, green)

Approval

ᜢ ᜫ

Weight (packaged)

≈ 1.4 kg (≈ 2.1 kg) (based on BW20-48) ≈ 1.4 kg (≈ 2.1 kg) (based on BW40-24)

01) C onnect '(TEST)M/S' of SLAVE emitter to 'SYNC' of MASTER. Refer to the product manual.

Power supply

12 - 24 VDCᜡ (ripple P-P: ≤ 10 %)

Current

Emitter / receiver: ≤ 120 mA

consumption

Control output

NPN or PNP open collector output

Load voltage

≤ 30 VDCᜡ

Load current

≤ 100 mA

Residual voltage

NPN: ≤ 1 VDCᜡ, PNP: ≤ 2.5 VDCᜡ

Reverse power protection circuit, output short overcurrent protection

Protection circuit

circuit

Insulation

≥ 20 MΩ (500 VDCᜡ megger)

resistance

± 240 V the square wave noise (pulse width 1㎲) by the noise

Noise immunity

simulator

Dielectric strength

1,000 VACᜠ 50 / 60 Hz for 1minute

1.5 mm double amplitude at frequency of 10 to 55 Hz (for 1 min) in

Vibration

each X, Y, Z direction for 2 hours

Shock

500 m/s² (≈ 50 G) in each X, Y, Z direction for 3 times

Ambient illumination

Ambient light: ≤ 100,000 ㏓

(receiver)

Ambient

-10 to 55 ℃, storage: -20 to 60 ℃ (no freezing or condensation)

temperature

35 to 85 %RH, storage: 35 to 85 %RH (no freezing or condensation)

Ambient humidity

Protection rating

IP65 (IEC standard)

Cable spec.

Ø 5 mm, 4-wire, 300 mm

M12 plug connector

Connector spec.

Material

Case: AL, front cover and sensing part: acryl

Troubleshooting

Malfunction

Cause

Power supply

Cable incorrect connection, or

Non-operation

disconnection

Out of rated sensing distance

Pollution by dirt of sensor cover

Non-operation in

sometimes

Connector connection failure

Out of the rated sensing distance

There is an obstacle to cut off the

Control output is

emitted light between emitter

OFF even though

and receiver.

there is not a target

There is strong electric wave or

object.

noise generator such as motor,

electric generator, or high voltage

line, etc.

LED displays for

Break of emitter

failure of emitter

LED displays for

Break of receiver

failure of receiver

LED displays for

break of light

Break of light emitting element

emitting element

Synchronous line incorrect

connection or disconnection

LED displays for

synchronous line

Break of synchronous circuit of

emitter or receiver

LED displays for

Break of emitter

emitter malfunction

Control output line is shorted

LED displays for

out.

over current

Over load

BW40-□(P)

≥ Ø 50 mm

4 to 24

120 to 920 mm

40 mm

01)

ᜢ ᜫ

Troubleshooting

Supply the rated power.

Check the wiring connection.

Use it within rated sensing distance.

Remove dirt by soft brush or cloth.

Check the assembled part of the

connector

Use it within the rated sensing

distance.

Remove the obstacle.

Put away the strong electric wave or

noise generator.

Contact Autonics Corp.

Check the wiring connection.

Contact Autonics Corp.

Treat after checking the emitter

display LED.

Check the wiring connection.

Check the rated load capacity.

Functions

■ Interference protection

In case of using 2 sensors in parallel in order to extend sensing width, it may cause

sensing error because as light interference. This function is operating a sensor as

MASTER and another sensor as SLAVE to avoid these sensing errors by the light

interference. Connect '(TEST)M/S' of SLAVE emitter to 'SYNC' of MASTER.

• Time chart for MASTER/SLAVE transmission pulse

MASTER

SLAVE

• MASTER / SLAVE connections

(NPN open collector output)

MASTER

Brown

White

SYNC

Black

TEST

(M/S)

Blue

0 V

Brown

White

SYNC

Black

LOAD

OUT

Blue

0 V

SLAVE

Brown

White

SYNC

Black

TEST

(M/S)

Blue

0 V

Brown

White

SYNC

Black

LOAD

OUT

Blue

0 V

■ Emitter OFF (external diagnosis)

When 0 V is applied to the TEST input of the emitter, the light emission is forcibly

stopped and the external system can check whether the sensor is operating normally.

When the emission is stopped, the light is blocked. In the case of Light ON mode, the

control output turns OFF. If the emitting stops, sensor is in light OFF status and control

output of receiver turns OFF.

• Connections for TEST input

Vcc

(For

contact relay)

Input part

solid state relay)

Black (TEST)

internal circuit

GND

Blue (0 V)

■ Optical axis misalignment alarm (low light intensity alarm)

This function outputs optical axis misalignment alarm, when front screen is

contaminated with dust, optical axis is misaligned due to vibration, emitter is

damaged due to the longterm usage, or light t is not received due to obstacle such

as leaves and trash on the product. The control output is changed according to the

degree of optical axis misalignment, and the red and green operation indicators of the

receiver flash alternately in 0.5 sec, and the yellow operation indicator turns on.

■ Self-Diagnosis

If there is checked malfunction during normal operation by regular self-diagnosis,

control output turns OFF and operation indicator displays the state.

For more information, see the "Operation Indicator"

• Break of emitter

• Break of emitter circuit

• M alfunction of MASTER / SLAVE line

(operation in MASTER)

• MASTER / SLAVE connections

(PNP open collector output)

MASTER

Brown

White

SYNC

Black

TEST

(M/S)

Blue

0 V

Brown

White

SYNC

Black

OUT

LOAD

Blue

0 V

SLAVE

Brown

White

SYNC

Black

TEST

(M/S)

Blue

0 V

Brown

White

SYNC

Black

OUT

LOAD

Blue

0 V

• Control output pulse by TEST input

(contact relay)

OFF

Emitter black

(TEST)

T1 ≥ 50 ms

Receiver black

(OUT)

OFF

T2 ≥ 20 ms

Normal

Abnormal

• Break of receiver

• Control output over current

• Noise of synchronous line