IFM Electronic VS2000 Exi Operating Instructions Manual

Operating instructions

Control monitor

VS2000 Exi

PTB 01 ATEX 2075

7390212/01 07/03

ENGLISH

ifm electronic Ltd. • Hampton, Middlesex TW12 2HD • Tel. 0208 / 213-0000

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The operating instructions
... apply to all control monitors of type VS2000 Exi. The only difference between the
individual units is the height of the permissible AC or AC/DC power supply which is
indicated on the type label of the unit.
... are part of the unit. They contain information about the correct handling of the
product. Read them before use to familiarise yourself with operating conditions,
mounting and operation. Follow the safety instructions.

Contents

1. Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2

2. Function and features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3

3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3

4. Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4

5. Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6

6. Function diagram flow monitoring . . . . . . . . . . . . . . . . . . . . . page 6

7. Installation and set-up / operation . . . . . . . . . . . . . . . . . . . . . page 7

8. Maintenance, repair, disposal . . . . . . . . . . . . . . . . . . . . . . . . . page 7

9. Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 7

1. Safety instructions

T

he unit must be installed, connected and put into operation by a qualified

electrician as during the installation dangerous contact voltage occurs
and the safe function of the unit and the plant is only guaranteed when
installation is correctly carried out.

B

e careful when handling the connected unit. Due to the protection rating

IP 20 this is only allowed by qualified staff.

T

he design of the unit corresponds to the protection class II except for the

terminal blocks where protection against accidental contact (safety from
finger-touch to IP20) for operation by qualified staff is only guaranteed if the
terminal screw has been completely screwed in. This is why the unit always
has to be mounted in a control cabinet of at least IP 54 which can only be
opened by means of keys.

I

n case of malfunction of the unit or uncertainties please contact the manu-

facturer. Tampering with the device can seriously affect the safety of peo­ple and equipment. This is not permitted and leads to an exclusion of liabil­ity and warranty.

Page 2

2. Function and features

The VS2000 Exi control monitor is designed to work with flow sensors of intrinsi-

cally safe design Ex"i". It meets the requirements according to EN50014 and

EN50020 (intrinsic safety "i").

The explosion group indicated on the unit as well as special conditions have to be

taken into account according to EC type test certificate PTB 01 ATEX 2075.

Marking:

• The unit provides intrinsically safe voltage supply for the sensors, evaluates the
signals from the sensors and signals whether a preset flow value has been
reached:

• Flows of either liquids or gases can be monitored.

• In addition the VS2000 Exi monitors the sensor cable: In the case of wire break
and short circuit the monitoring relay deenergises, the red LED is on.

3. Installation

The VS2000 Exi must be mounted outside the Ex zone.

• Mount the unit in a control cabinet with a protection rating of at least IP 54 to
guarantee protection against accidental contact with dangerous contact voltages
and against atmospheric influence.

• The control cabinet should be installed in accordance with local and national rules
and regulations.

• Mount the unit on a DIN rail.

• Mount the unit vertically and leave enough space between the unit and the top
and bottom of the control cabinet to enable air circulation to avoid excessive heat­ing.

When several units are mounted side by side the internal heating of all
units has to be considered. The ambient temperature for the individual unit
must not exceed the permissible value of +60°C.

Page 3

flow above the preset value output relay is energised
flow below the preset value output relay is deenergised

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