US-N300

Thru-beam Type Ultrasonic Sensor

Suitable for detecting

transparent films or
transparent bottles

Reliable detection of transparent objects Only 16 mm 0.630 in thick Simple operation mode selection
The sensor reliably detects transparent Its 16 mm 0.630 in thick compact body The operation mode can be selected
films or transparent objects. allows mounting in a narrow space. either sound-received-ON or sound-
blocked-ON simply by changing the
connection of the control input wire.

APPLICATIONS

Detecting transparent film or Detecting transparent bottles Detecting transparent and opaque
transparent glass objects

752 ECFA S.R.L. Av. San Juan 4063 (1233) Buenos Aires - Argentina- Tel.:+54 11 4923-6566 Fax:+54 11 4925-3232 Internet: www.ecfa.com.ar e-mail: ventas@ecfa.com.ar
 US-N300
ORDER GUIDE

Type Appearance Sensing range Model No.

Thru-beam

300mm US-N300

SPECIFICATIONS

Type Thru-beam
Item Model No. US-N300
Sensing range 300mm

Sensing object Transparent, translucent or opaque object: 2020mm or more, Hole: 1010mm or more

Supply voltage 12 to 24V DC10% Ripple P-P 10% or less

Current consumption Transmitter: 35mA or less, Receiver: 35mA or less

NPN transistor universal

Output • Maximum sink current: 100mA
• Residual voltage: 1V or less (at 100mA sink current)

Output operation Selectable either sound-received-ON or sound-blocked-ON by the control input

Short-circuit protection Incorporated

Response time 5ms or less

Operation indicator Red LED (lights up when the output is ON)

Sensitivity adjuster Continuously variable adjuster

Transmission frequency 220kHz approx.

Protection IP62 (IEC)

0 to50C (No dew condensation), Storage:25 to70C

Environmental resistance

Ambient temperature

Ambient humidity 35 to 85% RH, Storage: 35 to 85% RH

Noise immunity Power line: 1,000Vp, and 1!s pulse width; Radiation: 2,000Vp, and 1!s pulse width (with noise simulator)

Voltage withstandability 1,500V AC for one min. between all supply terminals connected together and enclosure

Insulation resistance 20MΩ, or more, with 500V DC megger between all supply terminals connected together and enclosure

Vibration resistance 10 to 55Hz frequency, 1.5mm amplitude in X, Y and Z directions for two hours each

Shock resistance 100m/s2 acceleration (10G approx.) in X, Y and Z directions for three times each

Material Enclosure: Polycarbonate

Cable 0.2mm2 4-core (transmitter: 2-core) cabtyre cable, 2m long

Cable extension Extension up to total 100m is possible, for both transmitter and receiver, with 0.2mm2, or more, cable.

Weight Transmitter: 80g approx., Receiver: 85g approx.

Accessories MS-N30 (Sensor mounting bracket): 2 sets, Adjusting screwdriver: 1 No.

ECFA S.R.L. Av. San Juan 4063 (1233) Buenos Aires - Argentina- Tel.:+54 11 4923-6566 Fax:+54 11 4925-3232 Internet: www.ecfa.com.ar e-mail: ventas@ecfa.com.ar 753
 US-N300
I/O CIRCUIT AND WIRING DIAGRAMS

I/O circuit diagram Wiring diagram

Color code

(Brown)V
D1 Brown
D2
Load
Sensor circuit

4.7kΩ  12 to 24V DC Load

(Black) Output 10% Black  12 to 24V DC
 10%

Tr 100mA max.
ZD
(Blue) 0V Blue
m1
(Pink) Control input m1
Pink

Internal circuit Users’ circuit

Note: The transmitter has only two power supply wires (V and 0V). m1
Non-voltage contact, NPN open-collector transistor or
NPN non-contact transistor
Symbols ... D1: Reverse supply polarity protection diode
D2: Reverse current protection diode
ZD: Surge absorption zener diode
Tr : NPN output transistor
or or

Low (0.5 to1.5V, or connected to 0V): sound-received-ON

High (6V to supply voltage, or open): sound-blocked-ON

SENSING CHARACTERISTICS (TYPICAL)

Parallel deviation Angular deviation Sensing field

400 400 400
Receiver 5050mm
#
Sound insulation board
Setting distance L (mm)
Setting distance L (mm)

Setting distance L (mm)

300 300 300

L

Transmitter
200 # 200 200
Transmitter
L Transmitter
100 Receiver 100 100
$
L

Receiver
0 0 0
40 20 0 20 40 40 20 0 20 40 20 10 0 10 20
Left Center Right Left Center Right Left Center Right
Operating point#(mm) Operating angle $(  ) Operating point #(mm)

754 ECFA S.R.L. Av. San Juan 4063 (1233) Buenos Aires - Argentina- Tel.:+54 11 4923-6566 Fax:+54 11 4925-3232 Internet: www.ecfa.com.ar e-mail: ventas@ecfa.com.ar
 US-N300
PRECAUTIONS FOR PROPER USE

This product is not a safety sensor. Its use is not Influence of surrounding objects
intended or designed to protect life and prevent body Influence of an object parallel to the sensing axis
injury or property damage from dangerous parts of • If there is a wall or a curtain near the sensing axis, the
machinery. It is a normal object detection sensor. sound reflection may cause the operation to be unstable.
Mounting
<Countermeasure>
• The tightening torque should be 0.49N m or less. Sensing axis
Transmitter Receiver

Keep a distance of 20mm or more

Wall or curtain

Influence of background objects

2-M415mm • If sensor heads are installed as shown in the figure below,
screws with
washers the operation may become unstable by the reflected sound
wave.
Sensor mounting
bracket An object, hard and
MS-N30 plain like a glass plate, Background
(Accessory) reflects the sound
wave.

Sensitivity adjustment
• Normally, use the sensor at the maximum sensitivity.
However, if the sensing is not proper due to surrounding Transmitter Receiver
Sensing object Placed perpendicular
objects (reflection from surrounding objects, etc.), adjust to the sensing axis.
the sensitivity as follows.
<Countermeasure>
Object absent Object present The receiver should be placed away from the object and at
Transmitter Receiver Transmitter Object Receiver an angle to it as shown below.
Receiver

10 approx.

Transmitter

Object

sound-received state sound-blocked state

Mutual interference
1 Set the adjuster to Min. Then, without any sensing • When two or more sensors are mounted closely, the sen-
object, turn the adjuster gradually clockwise, while see- sors may not enter the ‘sound-blocked state’ due to mutu-
ing the operation indicator, to determine the point where al interference.
the sensor enters the ‘sound-received state’.
2 With a sensing object between the sensor heads, turn <Countermeasure>
the adjuster further clockwise until the sensor enters the
‘sound-received state’ again. Then, turn the adjuster Parallel mounting Face-to-face mounting
back a little to determine the point where the sensor just
1
enters the ‘sound-blocked state’. Receiver Transmitter Transmitter Receiver Transmitter Receiver
3 Set the adjuster at the center of the two points described
in 1 and 2, which is the optimum sensitivity position.
Optimum sensitivity
Keep a distance of 10mm or more
sound-received state sound-blocked state
without sensing object with sensing object
2
Sensing range
Transmitter Receiver Transmitter Receiver Receiver Transmitter Transmitter

Keep a distance of
100mm or more
Back-to-back mounting is possible.

Min. Max.

Sensitivity adjuster

ECFA S.R.L. Av. San Juan 4063 (1233) Buenos Aires - Argentina- Tel.:+54 11 4923-6566 Fax:+54 11 4925-3232 Internet: www.ecfa.com.ar e-mail: ventas@ecfa.com.ar 755
US-N300
PRECAUTIONS FOR PROPER USE

Traveling speed and minimum sensing object width • In case noise generating equipment (switching regulator,
• Minimum sensing object width is 2020mm in the station- inverter motor, etc.) is used in the vicinity of this product,
ary condition. connect the frame ground (F.G.) terminal of the equipment
The minimum sensing width of a traveling object is related to an actual ground.
to the traveling speed and the sensor response time by the • Do not run the wires together with high-voltage lines or
following formula. power lines or put them in the same raceway. This can
W: Minimum sensing object width (m) cause malfunction due to induction.
W VTA (m) V : Traveling speed of the object (m/sec.)
T : Sensor response time 0.005 (sec.) Others
A : Minimum sensing object width in the stationary • Do not use during the initial transient time (50ms) after the
condition 0.02 (m) power supply is switched on.
Example: If V 10m/sec.
W 100.0050.02 0.07m
• The ultrasonic sound propagates through the air.
70mm If the sensor is used at a place where air blows or the tem-
perature suddenly changes (near a door, an air condi-
Wiring tioner, etc.) the operation may become unstable. Avoid
• Make sure to carry out the wiring in the power supply using US-N300 at such places.
off condition. • Take care that the sensor may malfunction due to an
• Verify that the supply voltage variation is within the rating. intense extraneous sound, such as, metal impact
• If power is supplied from a commercial switching regulator, sound.
ensure that the frame ground (F.G.) terminal of the power • Do not expose the transmitting element or the receiving
supply is connected to an actual ground. element to moisture or dust. It may affect the sensing
operation.

DIMENSIONS (Unit: mm)

US-N300 Sensor

12.6 12.1
8.3 7.4 Sensitivity adjuster (receiver only)
Operation indicator (Red) (Receiver only)
20
28 16
(2)

13

60
43

7.5 2-M40.7
4 thru-hole threads
"4.8 cable 2m long
"13
20

MS-N30 Sensor mounting bracket (Accessory)

Assembly dimensions
4.3 Mounting drawing 20
4 4.3
19 12
with the receiver
4
4.3 4 4.3 4 39
20 32

30
20
8 (2) 28

37 32 20
12

t2 4-"4.3 holes 88
75

Material: Cold rolled carbon steel (SPCC) 32

Two M4 (length 15mm) screws with washers are attached. 28 t2
12 4-"4.3 holes
5 20 5 19
30 35
39

756 ECFA S.R.L. Av. San Juan 4063 (1233) Buenos Aires - Argentina- Tel.:+54 11 4923-6566 Fax:+54 11 4925-3232 Internet: www.ecfa.com.ar e-mail: ventas@ecfa.com.ar