Leuze RKU 420 Data Sheet

12 - 30 V

DC

20 Hz

IEC 60947...

IEC 60947...

IP 67

42

6,5

9,5

3,2

14

M8 x 1

5,7

11,8

15

LEDTeach-In

20

29,5

A

B

RKU 420 Retro-reflective ultrasonic sensor

Dimensioned drawing

en 02-2016/02 50130124

0 … 400 mm

 Small retro-reflective ultrasonic sensor in

plastic housing with degree of protection
IP 67

 No dead zone on the sensor
 Switching behavior largely independent of

surface properties

 Reflector distance pre-set to 122mm
 Teach-in via teach button or cable
 Protection against erroneous operation by

automatically locking teach button

Accessories:

(available separately)

 M8 connectors (D M8…)
 Ready-made cables (K-D …)

A Active surface
B Green indicator diode

Electrical connection

We reserve the right to make changes • DS_RKU420_en_50130124.fm

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

RKU 420… - 02

Distance x [mm]

Misalignment y [mm]

Typ. response behavior (object 30 x 30mm)

RKU 420

Specifications

Ultrasonic data RKU 420/…

Operating range 0 … 400mm
Reflector distance 100 … 400mm
Reflector size > 30 x 30mm
Sound frequency 290kHz
Repeatability ≤ 1.5mm (relative to the reflector distance)
Temperature drift ≤ 2%/K (relative to the reflector distance)

Timing

Switching frequency 20Hz
Response time ≤ 25ms
Decay time ≤ 25ms
Readiness delay ≤ 200ms

Electrical data

Operating voltage UB
Residual ripple ≤ 10% of U
Open-circuit current ≤ 35mA
Switching output/function …/4NO… pin 4: PNP transistor, make-contact (NO)

Output current ≤ 200mA
Load C
Teach input pin 2: active high
Signal voltage high/low ≥ (U

2)

…/4NC… pin 4: PNP transistor, break-contact (NC)
…/2NO… pin 4: NPN transistor, make-contact (NO)
…/2NC… pin 4: NPN transistor, break-contact (NC)

12 … 30VDC incl. taking into account the residual ripple

max

B

Indicators

Green LED switching state (off = object detected)
Green LED slowly flashing teach event active
Green LED quickly flashing teaching error

Mechanical data

Housing plastic (PE), color: red (RAL 3000)
Active surface plastic (PC)
Standard measurement object 15 x15mm 30 x30 mm 30 x30mm
Fastening through-holes for 2 x M3
Weight ~ 10g
Connection type M8 connector, 4-pin

Environmental data

Ambient temp. (operation/storage) -10°C … +60°C/-40 °C … +85°C
Protective circuit
VDE safety class III
Degree of protection IP 67
Standards applied IEC/EN 60947-5-2
Certifications UL 508

1) Aligned perpendicular to sensor reference axis

2) Observe the safety regulations and installation instructions regarding power supply and wiring;
for UL applications: only for use in "Class 2" circuits acc. to NEC

3) 1=polarity reversal protection, 2=short circuit protection, 3=overload protection for all outputs

3)

1, 2, 3

B

= 10nF, L

-2V)/≤ 2V

2)

1)

max

= 20μH

Tables

10 400

RKU 420/…

1

Scanning range [mm]

Diagrams

RKU 420/…

30
24
18
12

6
0

-6

-12

-18

-24

-30
0 100 200 300 400

x

y2

y1

y2

y1

RKU 420… - 02 2016/02

Remarks

Operate in accordance with
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 the intended use.