Leuze DB 12 B Operating Instructions

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DB 12 B

Double Sheet Testing Unit

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TECHNICAL DESCRIPTION

Leuze electronic GmbH + Co. KG In der Braike 1 D-73277 Owen / Germany Phone: +49 7021 573-0 Fax: +49 7021 573-199 http://www.leuze.com

Leuze electronic DB 12 B

Table of contents

1 General information ........................................................................................................... 2

1.1 Explanation of symbols ........................................................................................................ 2

1.2 Declaration of conformity ..................................................................................................... 2

2 Safety notices..................................................................................................................... 3

2.1 Safety standards ..................................................................................................................3

2.2 Intended use ........................................................................................................................ 3

2.3 Areas of application ............................................................................................................. 3

2.4 Organisational measures .....................................................................................................3

3 Device overview .................................................................................................................4

4 Specifications..................................................................................................................... 6

5 Mounting the transmitter and receiver............................................................................. 8

6 Electrical connection ......................................................................................................... 9

7 Commissioning ................................................................................................................10

8 Operation - inputs and outputs....................................................................................... 14

9 Diagnosis in the case of error ........................................................................................ 15

10 Application-specific extension types............................................................................. 16

10.1 VDB 12 B/6.10P - Detection of splices on blister material ................................................. 16

10.2 VDB 12 B/6.11N - Automatic teach on first sheet .............................................................. 16

10.3 VDB 12B/6.12P - without teach button in the cover ........................................................... 16

Leuze electronic DB 12 B 1

General information

For UL applications: only for use in "Class 2" circuits according to NEC.

1 General information

1.1 Explanation of symbols

The symbols used in this technical description are explained below.

Attention!

This symbol appears before text passages which must absolutely be observed. Failure to heed this information can lead to injuries to personnel or damage to the equipment.

Notice!

This symbol indicates text passages containing important information.

1.2 Declaration of conformity

The DB 12 B double sheet testing unit sensor system has been developed and manufactured in adherence with the applicable European standards and directives.

Notice!

The corresponding declaration of conformity can be requested from the manufacturer.

The manufacturer of the product, Leuze electronic GmbH + Co. KG in D-73277 Owen/Teck, possesses a certified quality assurance system in accordance with ISO 9001.

2 DB 12 B Leuze electronic

2 Safety notices

2.1 Safety standards

The DB 12 B double sheet testing unit has been developed subject to the applicable safety standard EN 60947-5-2 (IEC 60947-5-2).

2.2 Intended use

The DB 12 B double sheet testing unit has been conceived as a monitoring device mainly for paper working machines. It monitors incoming paper sheets at machines designed to process single sheets. It is used to detect and signal double sheets in the sheet feeder during operation.

Attention!

The DB 12 B is not a safety module acc. to EU machine guidelines.

The protection of machine and the device cannot be guaranteed if the device is operated in a manner not corresponding to its intended use.

Access to or changes on the device, except where expressly described in this manual, are not authorised.

2.3 Areas of application

Safety notices

Double sheets made of the following materials can be reliably detected by the DB 12 B:

• Paper

• Plastic

• Metal foils

For paper, the measurement range is 20g/m cardboard).

(airmail paper) to 1200g/m2 (homogeneous

2.4 Organisational measures

All entries in this operating manual must be heeded, in particular those in the section "Safety notices" and "Commissioning".

Keep this technical description in a safe place. It should be accessible at all times.

Safety regulations

Observe the locally applicable safety regulations.

Qualified personnel

Mounting, commissioning and maintenance of the device may only be carried out by qualified personnel.

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Device overview

A M8 connector for transmitter DB 18 UP.1. … B M8 connector for receiver DB 18 UP.1. … C Indicator diodes D Push button TEACH IN E Alternative 42mm housing length (DB 18 UP.1-40, 2500)

3 Device overview

The ultrasonic double sheet testing system consists of a VDB 12 B… analysis amplifier and a pair of DB 18 UP ultrasonic sensors.

It detects and checks primarily paper, plastic and metal foils which are guided in by feeders. The device functions as a presence monitor by constantly applying a signal at the single sheet output when an object is located between the sensors. It functions as a double sheet testing unit by comparing each sheet with the stored reference value. A detected double sheet is signalled at the double sheet output.

Figure 3.1: Device overview - dimensions

4 DB 12 B Leuze electronic

Controls and indicators

A Green/yellow/red LED TEACH IN

B Ye l l o w L E D SINGLE SHEET

C Red LED DOUBLE SHEET

D Ye l l o w L E D READY

E Ye l l ow L ED TRIGGER IN

F Red LED TRIGGER OUT DOUBLE SHEET

T Push button TEACH IN

VDB 12 B/6.1P VDB 12 B/6.1N

VDB 12 B/6P VDB 12 B/6N

Device overview

Figure 3.2: Controls and indicators

Order guide

Designation Model Part No.

Sensor pair M18 x 25 mm, cable length 1.5m DB 18 UP.1-25,1500 501 09014 Sensor pair M18 x 25 mm, cable length 2.5m DB 18 UP.1-25,2500 501 08998 Sensor pair M18 x 42 mm, cable length 2.5m DB 18 UP.1-40,2500 501 08997 Amplifier (positive logic) VDB 12 B/6P 501 04021 Amplifier (negative logic) VDB 12 B/6N 501 04402 Amplifier with TRIGGER input (positive logic) VDB 12 B/6.1P 501 04038 Amplifier with TRIGGER input (negative logic) VDB 12 B/6.1N 501 04403

Accessories

Designation Model Part No.

Cable 5m, PVC, 5-pin, with M12 connectors K-D M12A-5P-5m-PVC 501 04557 Cable 5m, PUR, 8-pin, with M12 connectors K-D M12A-8P-5m-PUR 501 04590

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Specifications

4 Specifications

Technical data for sensor DB 18 UP

Sensor data

Operating range 20 … 60mm Converter frequency 200kHz ±2% Ultrasonic lobe approx. 12°

Mechanical data

Housing nickel-faced brass Weight 30g Connection type 1.5/2.5m cable with M8 connector,

Technical data for analysis amplifier VDB 12 B/…

Timing

Switching frequency 200Hz Input pulse min. 5 ms Delay before start-up ≤ 300ms

Electrical data

Operating voltage U

Residual ripple ≤ 15% of U Open-circuit current ≤ 75mA Switching output …/6… 2 push-pull switching outputs

Function all types

Signal voltage high/low ≥ (UB- 2V) / ≤ 2V Output current max. 100mA per output TEACH-/TRIGGER input R TEACH-/TRIGGER IN active/not active5)…/…P (PNP): ≥ 10V / ≤ 2V or not connected

TRIGGER IN pulse duration ≥ 1ms TEACH-/TRIGGER IN duration max. 100ms TEACH IN delay

Indicators

all models:

LED green A double sheet testing unit ready LED A yellow teach-in process LED A red flashing error (see chapter 9) LED yellow B single sheet detected LED red C double sheet detected

only …/6.1…:

LED yellow D ready for function READY LED yellow E inquiry signal TRIGGER IN LED red F double sheet triggered TRIGGER OUT

Mechanical data

Housing aluminium, black powder-coated Weight 400g Connection type M12 connector,

3-pin, bending radius r > 25mm

…/6.1… 4 push-pull switching outputs 1

all types only …/6.1… only …/6.1…

18 … 30VDC (incl. residual ripple)

single sheet detected, or ≥ 1 sheet double sheet detected, or ≥ 2 sheets double sheet triggered double sheet testing unit ready to operate

=10kΩ

…/…N (NPN): ≤ 2V / ≥ 10V or not connected

approx. 300ms

…/6…:5-pin …/6.1…:8-pin

6 DB 12 B Leuze electronic

Specifications

Environmental data

Ambient temp. (operation/storage) 0 °C … +50°C / -40°C … +70 °C Protective circuit VDE safety class III Protection class IP 65 Standards applied EN 60947-5-2 Certifications UL 508, C22.2 No.14-13

1) For UL applications: only for use in "Class 2" circuits according to NEC.

2) Function: …/…P = active high (+24V); inactive low (0V),

The push-pull switching outputs must not be connected in parallel

3) Is set during low/high transition (…/…P) or high/low transition (…/…N) of the TRIGGER IN input and reset when the measurement field becomes vacant; trigger delay response time from edge until switching of the switching output is

4) Is set when the operating voltage is applied if the receiving level is adequate as well as after the teach event if the calibration was successful.

5) Setting the Teach IN input disables the TEACH IN button (see page 10)

6) Only applies for automatic calibration during sheet movement (automatic teach)

7) 1=transient protection, 2=polarity reversal protection, 3=short circuit protection

8) These proximity switches shall be used with UL Listed Cable assemblies rated 30V,

0.5A min, in the field installation, or equivalent (categories: CYJV/CYJV7 or PVVA/PVVA7)

…/…N = active low (0V); inactive high (+24V).

1,2,3

1) 8)

≤ 1ms

≤ 1ms, i.e.,

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Mounting the transmitter and receiver

A Receiver B Angle of inclination C Sheet material D Transmitter

Sheet material Recomm. angle of inclination B

0° 15° … 25° 25° … 35° Standard paper up to 150g/m² X X X Cardboard X X Plastics X

A Receiver B Machine direction C Sheet material D Transmitter

5 Mounting the transmitter and receiver

The transmitter and receiver (DB 18 UP) are identical in construction and are to be mounted according to the table in figure 5.1 at an angle which varies depending on the sheet material. A larger angle of inclination increases the flutter range; e.g. with a 35° pitch, flutter is permissible within 50% of the measurement field. The distance between transmitter and receiver must be at least 20mm and can be max. 60mm.

Ensure that alignment is exact (± 1°). If the alignment does not run along the axis, the working range is reduced.

Notice!

When aligning the transmitter and receiver, take care to ensure the most exact alignment possible. See "Alignment mode" on page 10. To ensure proper function, the sensors must be inclined by the angle "B" towards the vertical.

Figure 5.1: Mounting the transmitter and receiver

Figure 5.2: Recommended configuration for maximum functionality

8 DB 12 B Leuze electronic

6 Electrical connection

Connect the transmitter and receiver at the appropriate M8 connectors of the VDB 12 B… analysis amplifier.

Connect the analysis amplifier acc. to connection diagram (figure 6.1).

Figure 6.1: Connection diagrams VDB 12 B…

Circuit logic

VDB 12B/…P -> positive logic

VDB 12B/…N -> negative logic

Electrical connection

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Commissioning

7 Commissioning

Notice!

If the indicators flash during the initial commissioning, a calibration must first be performed on a single sheet.

First apply operating voltage. An alignment mode is available for commissioning. This can be used to check the alignment of the transmitter and receiver.

Alignment mode

Press the TEACH IN button for > 5s and < 10 s

LEDs and flash synchronously at 3 Hz



LED green:

LED yellow:

LED red: Alignment bad

Notice!

After exiting alignment mode, it is absolutely necessary to perform a calibration.

Calibrating on the material to be detected

For reliable detection of double layers of the medium being processed, it is always necessary to perform a calibration on a single sheet of the medium.

Calibration of the material to be detected can be performed by either pressing the TEACH IN button on the analysis amplifier for 0.3s to 5s or by means of a control command at the Teach IN input (pin 5).

Alignment OKExit:

Alignment critical

press the TEACH IN button < 5s

Align transmitter and receiver until LED is green. Only then is it possible to exit alignment mode! Extraordinary exiting of alignment mode is possible only by means of Power OFF!



Notice!

Setting the Teach IN input (pin 5) disables the TEACH IN button. As soon as a signal is applied once via the Teach IN input for the purpose of calibration, the TEACH IN button remains inactive (disabled) until the next Power On.

10 DB 12 B Leuze electronic

Commissioning

During the calibration process, LED illuminates yellow.

If the calibration was successful, LED illuminates green and LEDs and yellow. The single sheet and ready outputs are activated. The reference value remains stored until the next calibration process.

If the calibration process was not successful, LED flashes red and LEDs and illuminate red. The double sheet and TRIGGER OUT outputs (double sheet triggered) are activated.

Notice!

Causes of unsuccessful calibration include e.g.:

• More than 1 sheet between the sensors.

• Unsuitable sheet material, e.g. due to lamination or coating, too thin, too thick, or air pockets present.

• Pitch to sensors too low.

For devices VDB 12 B/6.1N and VDB 12 B/6.1P with trigger input Trigger IN (pin 6), it is recommended that the device be configured in such a way that, for Trigger IN, the threshold signals be adapted so that the amplifier always operates in the optimum range (1., standard mode). This mode is especially recommended when the material consistency changes during operation (moisture, density, …).

The VDB 12 B analysis amplifier can be operated in 3 different operating modes (teach modes):

1. Standard mode: Teach with intelligent transmitter/receiver control for covering a wide spectrum of materials. Automatic signal adaptation (averaging) during operation for VDB 12 B/

6.1….

2. Automatic teach: 300ms after sheet detection by the ultrasonic sensors, teach-in occurs automatically. In this operating mode, manual or external teaching is not necessary. Automatic signal adaptation (averaging) possible during operation for VDB 12 B/6.1…. Another automatic teach-in is carried out when the ultrasonic path is clear for more than 2s.

3. Fixed switching threshold: This operating mode is recommended when the process does not permit manual or external teaching. In this operating mode, the variety of materials to be detected is limited.

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Leuze electronic DB 12 B 11

Commissioning

Selecting the operating mode (teach mode)

Press the TEACH IN button for >10s and <15s

1. LED green:

2. LED red:

3. LED off:

Attention!

After selecting the operating mode (teach mode), a calibration must be performed!

LEDs and flash alternately at 3 Hz



Manual teach (standard mode)

Automatic teach on the first sheet

Permanently stored switching threshold

To select and exit: press the TEACH IN button > 3s (LED yellow) To advance to next: press the TEACH-IN button <3s



To select and exit: press the TEACH IN button > 3s (LED yellow)

To advance to next: press the TEACH-IN button <3s



To select and exit: press the TEACH IN button > 3s (LED yellow)

To advance to next: press the TEACH-IN button <3s



Adapting the averaging calculation (VDB 12 B/6.1… only)

For device variants VDB 12 B/6.1… with trigger input, it is possible to adapt the signals during running control operation (operating mode 1, standard mode).

Signal adaptation is performed by averaging measurement values which are detected at the respective Trigger IN. A lower value, e.g. 4, means that an average value is calculated from 4 trigger IN measurement values; a higher value, e.g. 128, means that an average value is calculated from 128 trigger-in measurement values. Signal adaptation occurs every time the set number of trigger pulses is reached.

Signal adaptation (averaging) is also possible in operating mode 2, automatic teach.

Attention!

After changing the averaging, recalibration must be performed!

12 DB 12 B Leuze electronic

Commissioning

Press the TEACH IN button for > 15s and < 20s

LED flashes red, LED illuminates yellow. The other LEDs display the current configured average value



Average value

via

off =

no signal

adaptation

LED LED LED

off off off



4 values

(trigger pulses)

on off off



8 values

(trigger pulses)

off on off



16 values

(trigger pulses,

default)

on on off



32 values

(trigger pulses)

off off on



64 values

(trigger pulses)

on off on



128 values

(trigger pulses)

off on on



No change back on on on