IFM Electronic VNB211 Operating Instructions Manual

Operating instructions

Vibration sensor

VNB211

80270676/00 12/2017

Content

1 Preliminary note �� 4

1�1 Notes on this document �� 4 1�2 Symbols used ��4

2 Safety instructions ��4

2�1 General �� 4 2�2 Installation and connection ��4 2�3 Tampering with the device ��5

3 Functions and features ��5

4 Installation��6

5 Electrical connection �� 7

5�1 M8/USB interface ��7 5�2 History values ��7 5�3 Real-time clock ��8

6 Functions ��8

6�1 Monitoring function ��8 6�2 Input function ��8 6�3 Output function (switching output and analogue output) ��9 6�4 Self-test��9 6�5 Averaging of a vibration characteristic value ��9

6�5�1 Calculation �� 9 6�5�2 Settings ��10 6�5�3 Diagram averaging ��10

6�6 Measuring function ��10

7 Operating and display elements �� 11

7�1 LED display �� 11 7�2 7-segment display ��12 7�3 Operating mode �� 12

7�3�1 Examples in the operating mode ��12

7�4 Operating mode external process value �� 13

7�4�1 Example display change (v

- external process value) ��13

rms

8 Device configuration ��14

8�1 Programming via pushbuttons �� 14

8�1�1 Global VNB parameters ��14

8�1�2 Characteristic vibration value ��14 8�1�3 External process value ��14

9 Menu �� 14

9�1 Menu structure �� 15 9�2 Main menu �� 15

9�2�1 V1 menu ��16 9�2�2 V2 menu ��16 9�2�3 EV1 menu �� 16 9�2�4 EV2 menu �� 17 9�2�5 EP1 menu �� 17 9�2�6 EP2 menu �� 18 9�2�7 Ext menu ��18 9�2�8 Out menu �� 19

9�3 Explanation of the menu �� 20

10 Parameter setting via the pushbuttons on the unit ��22

10�1 Parameter setting in general ��22

10�1�1 Change from menu level 1 to the sub-menu ��23 10�1�2 Locking / unlocking ��24

11 Maintenance, repair and disposal �� 24

12 Scale drawing ��24

13 Time diagrams ��25

13�1 Averaging for a characteristic vibration value ��25 13�2 Switching delay for the upper limit monitor �� 26 13�3 Switching delay for the lower limit monitor ��28

14 Factory setting ��29

1 Preliminary note

Technical data, approvals, accessories and further information at www�ifm�com�

1.1 Notes on this document

This document applies to devices of the type "vibration sensor" (art� no�: VNB211)� It is part of the device and contains information about the correct handling of the product�

This document is intended for qualified electricians� These specialists are people who are qualified by their training and their experience to see and to avoid possible hazards that may be caused during operation of the device�

► Read this document before using the device� ► Keep this document during the service life of the device�

1.2 Symbols used

► Instructions

> Reaction, result

→ Cross-reference

LED on LED flashes

Important note Non-compliance may result in malfunction or interference�

Information Supplementary note

2 Safety instructions

2.1 General

► Observe these operating instructions� ► Observe the warning notes in these instructions�

Non-observance of the instructions, operation which is not in accordance with use as prescribed below, wrong installation or incorrect handling can affect the safety of operators and machinery�

2.2 Installation and connection

The device must only be installed, connected and put into operation by a qualified electrician as the safe function of the device and machinery is only guaranteed 4

when installation is correctly carried out� The installation and connection must comply with the applicable national and international standards� Responsibility lies with the person installing the device�

This is a class A product which is intended for use in industrial applications� The unit may cause radio interference in domestic areas� In this case it can be necessary for the user to take appropriate measures�

2.3 Tampering with the device

Tampering with the device is not allowed and will lead to an exclusion of liability and warranty� Tampering with the device can affect the safety of operators and

machinery�

3 Functions and features

The parameters of the device are mainly set via the VES004 PC software�

The device manual can be found at www�ifm�com

Monitoring of

• 2 sensor-internal characteristic vibration values (a/v, RMS/peak)

• 2 external characteristic vibration values (a/v, RMS/peak via VNA001 accelerometer) or two external process values (current value above and/or below limit value)

Visualisation of

• Measured values

• Switching states

• Measured data via PC software

4 Installation

Please note the following points when installing the unit:

► Mount only in a thick housing wall

(e�g� crane hook thread)�

► Mount vertically to the machine

surface using the spacer adapter in the direction of the strongest vibrations� This is usually the radial direction�

► Tighten the M5 screw with a

tightening torque of 7 Nm�

► Ensure a reliable vibration

transmission� Avoid any elastic intermediate layers�

2 3

1: Measurement axis

2: M5 screw

3: Spring washer

4: M8 x M5 adapter

5: Machine surface

5 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� Voltage supply to EN 50178, SELV, PELV� Disconnect power before connecting the unit�

 

M12









Pin 1: L+ 9�6��30 V DC Pin 2: Out 1 Switching output or current output

Pin 3: L Pin 4: Out 2 Switching output Pin 5: IN Current input 0/4��20 mA

Pin 1: VCC (5 V) Pin 2: USB DPin 3: LPin 4: USB D+



5.1 M8/USB interface

0/4��20/22 mA (configurable)

► First connect the interface cable to the device and then to the USB interface of

the computer�

• Communication with the PC software for parameter setting of the objects to be monitored, to read and reset the history data and to visualise measured data�

• The devices have a serial number that can be read via the PC software�

• The sensor can also be supplied via the USB interface�

Switching and analogue outputs are not supported if a USB power supply is used�

5.2 History values

The unit has an internal history memory� The memory interval can be configured for each object via the PC software (min� 1 s)� The maximum value and optionally the average value in this interval are stored together with the time stamp in the memory�

The memory's capacity is 685,000 values; beyond this the oldest values are overwritten (ring memory, FIFO)�

The history can be configured, read and reset via the PC software�

5.3 Real-time clock

The unit has an integrated real-time clock including a buffer battery for the time stamp in the history memory� The time is synchronised with the system clock when the history is reset via the PC software�

6 Functions

The basic functions of the unit are set via the PC software� Only parameters for alarming and scaling of the signals can be set via the buttons

on the unit → 8.1 Programming via pushbuttons

6.1 Monitoring function

The VNB211 can monitor up to two internal characteristic vibration values� The characteristic values are activated and configured via the PC software� Monitoring can be effected in acceleration or vibration velocity in a frequency range that can be set�

On delivery, the first characteristic value monitors the effective value of the vibration velocity to ISO 10816 in the frequency range of 10��1000 Hz�

On delivery, the second characteristic value monitors the maximum peak of the acceleration in the frequency range of 10��6000 Hz�

6.2 Input function

Monitoring can be extended by another vibration measuring point or a process value via the external input of the VNB211�

For the external input it is also possible to monitor up to two characteristic values� With an extension by a vibration measurement point (with a VNA001 accelerometer + Y cable) the same parameters can be configured as with internal characteristic vibration values�With an extension by a process value (via an analogue 4��20 mA current signal) the process value (e�g� a storage temperature or pressure) can be monitored for exceeding and/or falling below the limit value�

On delivery, the first characteristic value for the external input is configured as temperature monitoring (e�g� connection of a TT3237)�

The second characteristic value is deactivated on delivery�

6.3 Output function (switching output and analogue output)

The two outputs of the VNB211 are used for the alarm (pre-alarm, main alarm)� The first output (OU1) can be used as digital or analogue output� The switching logic (which characteristic values are alarmed in which way) can be set only in the PC software�

System errors (e�g� a failed self-test) are also signalled on the first output (OU1)� If the output is used as digital output, the output pulses with a frequency of 1 Hz in case of a fault� A current of 22 mA is provided as analogue output in case of a system error�

6.4 Self-test

The self-test checks the function of the VNB's measuring cell� The self-test is made during power-on and can in addition be started manually via the PC software or the buttons on the unit�

Displays on the unit:

• Self-test passed → [PASS]

• Self-test failed → [FAIL]

> LED OU1 flashes Output OU1

- pulsing if "digital" output function (NC, NO)

- supplies 22 mA if "analogue" output function

6.5 Averaging of a vibration characteristic value

6.5.1 Calculation

Formula to determine the new diagnostic value: ("previous diagnostic value" x (1 - averaging)) + ("new measurement" x averaging)

= new diagnostic value Example Averaging 0�25; "previous diagnostic value" 17�3 mm/s;

"new measurement" 14�7 mm/s (17�3 mm/s x (1 - 0�25)) + (14�7 mm/s x 0�25) = 16�65 mm/s

For the VNB211 the measurement time between "previous diagnostic value" and "new measurement” can be configured via the PC software�

6.5.2 Settings

4710 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94 97

Averaging = 1: averaging deactivated Averaging 0�01; strong averaging

6.5.3 Diagram averaging

1: Measured value 2: Averaged diagnostic value (averaging = 0�125)

6.6 Measuring function

The device can be set to the measurement mode via the VES004 software� In this mode, you have access to the raw data (time signal) of the acceleration or of the external input (4��20 mA)� The data can be visualised, recorded, analysed and processed in the software�

If the device remains connected to the software, the user has to actively (manual ly) finish the time signal monitoring� If the device is separated from the software, it automatically returns to the monitoring function�

If the unit is in the measurement mode, there is no monitoring� "rSc3" is displayed

on the unit�

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