IFM Electronic VKV021 Manuale utente

Operating instructions

Vibration sensor

VKV021

704575 / 02 08 / 2014

Contents

1 Safety instructions ��3

2 Functions and features ��4

3 Installation ��4

4 Electrical connection��4

5 Settings��4

5�1 Measuring range��5

5�2 Switching output behaviour ��5

6 Operating and display elements ��6

7 Scale drawing ��7

8 Maintenance, repair, disposal��7

9 Technical data��7

Preliminary note

• Aninstructionisindicatedby"►":

Example:►Checkwhethertheunitoperatescorrectly.

Important note

Non-compliance can result in malfunctions or interference�

Information

Supplementary note�

1 Safety instructions

• Please read the product description prior to set-up of the unit� Ensure that the

product is suitable for your application without any restrictions�

• TheunitconformstotherelevantregulationsandECdirectives.

• Improper or non-intended use may lead to malfunctions of the unit or to

unwanted effects in your application�

• That is why installation, electrical connection, set-up, operation and

maintenance of the unit must only be carried out by qualified personnel

authorised by the machine operator�

2 Functions and features

The vibration sensor detects the vibration in the system (measured / evaluated

physical unit = vibration velocity)� This is converted into an analogue signal at the

current output� The switching output behaviour is determined using the two setting

rings�

3 Installation

► Mountonlyinathickhousingwall(e.g.transportthread).

►Ensure that the signal direction is correct�

►Ensure a safe vibration transmission and allow no elastic intermediate layers�

►Tighten the sensor with a tightening torque of 15 Nm�

4 Electrical connection

The unit must be connected by a qualified electrician� The national and

international regulations for the installation of electrical equipment must be

adhered to�

M12

L+

4...20 mA

Pin1:L+

Pin2:4...20mA

Pin3:GND

Pin4:digitaloutput

(normally closed)

5 Settings

RMS Set

Effective value of the switching threshold, defining the limit value of the vibration

velocity�

DelaySet

Time in seconds during which the limit value must be effectively above the swit-

ching threshold (RMS Set) to activate the switching output (normally closed pin 4)�

5.1 Measuring range

Veff mm/s 0��25

Iout mA 4��20

Response delay s 1��60

5.2 Switching output behaviour

  









1: Time delay after the switching threshold has been exceeded

2: Time delay after the switching threshold has been exceeded

3: Switch-off

4: Switching threshold

5: Delay

Vss = vibration velocity

t = time

Implementation of the time delays

The time delay starts when the defined switching threshold is exceeded (1) / (2)�

The time delay is cancelled when the value falls below the switching threshold

(without switch-off)� The switch-off is triggered when the switching threshold is

exceeded during a full time delay (3)�

6 Operating and display elements

RMS Set

Delay Set

L+

GND

4...20 mA

3 5

1:lockingring

2:settingrings(manuallyadjustableafterunlocking)

3:LEDgreen:voltagesupply

4:M8processconnection

5:LEDyellow:lightswhenswitchingthresholdandtimedelayareexceeded

6:settingmarks

Toachievethesettingaccuracy:firstpositiontheringstothelowerend

stop value, then set the requested value�

7 Scale drawing

63,7

M12x1

73,1

1: measurement axis

2: tightening torque 15 Nm

8 Maintenance, repair, disposal

The operation of the unit is maintenance-free� It is not possible to repair the unit�

After use dispose of the unit in an environmentally friendly way in accordance with

the applicable national regulations�

9 Technical data

Technical data and further information at

www.ifm.com-->Selectyourcountry-->Datasheetdirect:

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