Leuze RKU318 Data Sheet

10 - 30 V

DC

IP 67

IEC 60947...

IEC 60947...

RKU318 Ultrasonic sensors with 1 switching output

Dimensioned drawing

en 01-2017/02 50135809

0 … 400mm

0 … 1600mm

 Function largely independent of surface

properties, ideal for detection of liquids,
bulk materials, transparent media, …

 Small dead zone at long scanning range
 Adjustment of the reflector distance can be

taught

 NO/NC function reversible
 1 switching output (PNP or NPN)
 NEW – Stable plastic design
 NEW – Temperature-compensated

scanning range

Accessories:

(available separately)

 Mounting systems
 Mounting adapter M18-M30:

BTX-D18M-D30 (Part no. 50125860)

 Cables with M12 connector

(KD …)

 Teach adapter PA1/XTSX-M12

(Part no. 50124709)

We reserve the right to make changes • PAL_RKU318_400_1600_1SWO_en_50135809.fm

A Active sensor surface
B Teach-in button
C Indicator diodes

Electrical connection

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. [phone]
[e-mail] • www.leuze.com

RKU318-400…-M12 - 01

RKU318-1600…-M12 - 01

Object distance x [mm]

Width y of the sound cone [mm]

Typ. response behavior (plate 100x 100mm)

Reflector

-100

-50

0

50

100

0 100 200 300 400 500

y1

y2

Object distance x [mm]

Width y of the sound cone [mm]

Typ. response behavior (rod Ø 25 mm)

Reflector

-300

-200

0

100

-100

200

300

0 400 800 16001200

y1

y2

Object distance x [mm]

Width y of the sound cone [mm]

Typ. response behavior (plate 200x 200mm)

Reflector

-300

-200

0

100

-100

200

300

0 400 800 16001200

y1

y2

Object distance x [mm]

Width y of the sound cone [mm]

Typ. response behavior (rod Ø 25 mm)

Reflector

Object distance [mm]

Target (fixed):

plate or rod

Sound cone

= f (α,x)

RKU318

Technical data

Ultrasonic specifications RKU318-400/…-M12 RKU318-1600/…-M12

Operating range
Reflector distance 100 … 400mm 250 … 1600mm
Object distance to background (reflector) ≥ 100 mm ≥ 250 mm
Ultrasonic frequency 300kHz 230kHz
Typ. opening angle 8° ± 2 ° 8° ± 2°
Resolution <2mm <2mm
Direction of beam Axial Axial
Reproducibility ± 0.5%
Switching hysteresis 1% 3) 1%
Temperature drift ≤ 5%

Timing

Switching frequency 8Hz 1 Hz
Response time 62ms 500ms
Readiness delay < 500ms < 500ms

Electrical data

Operating voltage U
Residual ripple ± 5% of U
Open-circuit current ≤ 50mA
Switching output …/4…

Function NO (normally open), preset
Output current Max. 100 mA
Setting the reflector distance Teach-in button 2 … 7s
Changeover NO/NC Teach-in button > 12s

Indicators

Yellow LED OUT1: object detected
Flashing yellow and green LEDs Teach-in / teaching error
Green LED Object within the scanning range

Mechanical data

Housing Plastic (PBT)
Active surface Epoxy resin, glass fiber rein-

Weight 70g

Ultrasonic transducer Piezoceramic

Connection type M 12 connector, 4-pin
Fitting position Any

Environmental data

Ambient temp. (operation/storage) -20° … +70°C/-20° … +70°C
Protective circuit
VDE protection class III
Degree of protection IP 67
Standards applied EN 60947-5-2
Certifications UL 508, CSA C22.2 No.14-13

1) At 20°C

2) Target: 100mm x 100 mm plate

3) Target: 200mm x 200 mm plate

4) From end value

5) Over the temperature range -20°C … +70°C

6) For UL applications: use is permitted exclusively in Class 2 circuits according to NEC

7) The ceramic material of the ultrasonic transducer contains lead zirconium titanate (PZT)

8) 1=short-circuit and overload protection, 2=polarity reversal protection, 3=wire break and inductive protection

9) These proximity switches shall be used with UL Listed Cable assemblies rated 30V, 0.5 A min,
in the field installation, or equivalent (categories: CYJV/CYJV7 or PVVA/PVVA7)

1)

6)

B

0…400mm 2)

1) 4)

5)

0 … 1600mm 3)

±0.5% 1)

3)

≤ 5% 4)

10 … 30V DC (incl. ± 5% residual ripple)

B

3)

1 PNP transistor switching output

…/2…

1 NPN transistor switching output

forced

7)

8)

1, 2, 3

6) 9)

Diagrams

RKU318-400/…-M12

100

50

0

-50

-100
0 100 200 300 400 500

RKU318-1600/…-M12

y2

y1

RKU318-400…-M12 - 01 2017/02
RKU318-1600…-M12 - 01

Notes

Observe intended use!

 This product is not a safety sensor

and is not intended as personnel
protection.

 The product may only be put into

operation by competent persons.

 Only use the product in accor-

dance with its intended use.

RKU318 Ultrasonic sensors with 1 switching output

Part number code

RKU318-1600 . 3/4X-M12

Operating principle
HTU Ultrasonic sensor, scanning principle, with background suppression
DMU Ultrasonic sensor, distance measurement
RKU Ultrasonic sensor, retro-reflective ultrasonic sensor

Series
318 318 series, cylindrical short M18 design

Operating ranges in mm
400 0 … 400
1600 0 … 1600

Equipment (optional)
.3 Teach button on the sensor

Pin assignment of connector pin 4 / black cable wire (OUT1)
4 PNP output, NO contact preset
P PNP output, NC contact preset
2 NPN output, NO contact preset
N NPN output, NC contact preset
C Analog output 4 … 20 mA
V Analog output 0 … 10 V

Pin assignment of connector pin 2 / white cable wire (Teach-IN)
T Teach input
X Not assigned (n. c.)

Connection technology
M12 M12 connector, 4-pin

Order guide

The sensors listed here are preferred types; current information at www.leuze.com.

Designation Part no.

Operating range / switching output / teach-in

0 … 400mm / PNP / teach button RKU318-400.3/4X-M12 50136094
0 … 400mm / NPN / teach button RKU318-400.3/2X-M12 50136095
0 … 1600mm / PNP / teach button RKU318-1600.3/4X-M12 50136096
0 … 1600mm / NPN / teach button RKU318-1600.3/2X-M12 50136097

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. [phone] RKU318-400…-M12 - 01
[e-mail] • www.leuze.com RKU318-1600…-M12 - 01

Reflector

Dead zone

Permissible reflector distance =

100 … 400mm (RKU318-400…)

250 … 1600mm (RKU318-1600…)

OUT

On

Off

0

RKU318

Reflector

Dead zone

Object

RKU318

Device functions and indicators

The sensor detects objects from 0 mm to the reflector distance less the dead zone.
The dead zone is max. 10% of the selected reflector distance.

Note!

The switching behavior is not defined in the dead zone.

All settings on the sensor are taught-in via the teach button. Device status and switching states are indicated as follows by
means of a LED:

Without object With object

0

RKU318

On

OUT

Off

Switching output OUT 1 = not active (Off)
Green LED is on

Switching output OUT 1 = active (On)
Green LED is off

RKU318-400…-M12 - 01 2017/02
RKU318-1600…-M12 - 01

RKU318 Ultrasonic sensors with 1 switching output

Adjusting the reflector distance via the teach button

The reflector distance of the sensor is set to 400mm or 1600mm on delivery.

Through a simple teach event, the reflector distance can be taught in within the respective operating range. This is performed via
the teach button, which can also be used to easily changeover the output function from NO contact to NC contact.

Teach button

Place the reflector at the desired position
and perform the teach event

If the reflector is at the desired position, press the
teach button for 2 ... 7 s until the yellow LED flashes
briefly - release the button. Green LED on. The sensor
now detects objects that are located in the sound
path between sensor and reflector.

When an object is detected, the green LED is on.

Adjusting the switching function (NC/NO) via the teach button

The switching function of the sensor is set to normally open (NO) on delivery.

The output function can be switched from NO contact (NO - normally open) to NC contact (NC - normally closed) and vice versa.
If the switching function is changed, the switching output is changed to the opposite state (toggled).

Changeover of the switching function

1. To change the switching function, press the teach button for longer than 12s.
The current state of output OUT1 is frozen during the adjustment process.

2. The green and yellow LEDs flash alternately at 2Hz.

The switching function was changed over.

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen Tel. [phone] RKU318-400…-M12 - 01
[e-mail] • www.leuze.com RKU318-1600…-M12 - 01

Resetting to factory settings

The sensor can be reset to the factory setting (reflector distance at 400 mm or 1600 mm).

Resetting to factory settings

1. When switching on the supply voltage (during power-on), press the teach button for >5s.

2. Release the button. The green and yellow LEDs flash alternately and very quickly for a brief time.

The sensor was reset to the factory setting:
reflector distance

400 mm or 1600 mm.

RKU318

RKU318-400…-M12 - 01 2017/02
RKU318-1600…-M12 - 01