IFM SBU3 Series User manual

Operating instructions

Mechatronic flow sensor

SBU3xx

11374543 / 0008 / 2021

SBU3xx Mechatronic flow sensor

Contents

1 Preliminary note ............................................................. 3

1.1 Symbols used.......................................................... 3

1.2 Warnings used ......................................................... 3

2 Safety instructions............................................................ 4

3 Intended use................................................................ 5

4 Mounting................................................................... 6

4.1 Process connection...................................................... 6

5 Electrical connection.......................................................... 7

6 Settings.................................................................... 8

6.1 Set the switch point on the unit............................................. 8

6.2 Carry out the flow adjustment.............................................. 8

7 Operation .................................................................. 9

8 Maintenance, repair and disposal................................................ 10

Mechatronic flow sensor SBU3xx

1 Preliminary note

You will find instructions, technical data, approvals and further information using the QR code on the

unit / packaging or at www.ifm.com.

1.1 Symbols used

Requirement

Instructions

Reaction, result

[...] Designation of keys, buttons or indications

Cross-reference

Important note

Non-compliance may result in malfunction or interference.

Information

Supplementary note

1.2 Warnings used

ATTENTION

Warning of damage to property

CAUTION

Warning of personal injury

wSlight reversible injuries may result.

SBU3xx Mechatronic flow sensor

2 Safety instructions

• The unit described is a subcomponent for integration into a system.

– The system architect is responsible for the safety of the system.

– The system architect undertakes to perform a risk assessment and to create documentation in

accordance with legal and normative requirements to be provided to the operator and user of

the system. This documentation must contain all necessary information and safety instructions

for the operator, the user and, if applicable, for any service personnel authorised by the

architect of the system.

• Read this document before setting up the product and keep it during the entire service life.

• The product must be suitable for the corresponding applications and environmental conditions

without any restrictions.

• Only use the product for its intended purpose (Ò Intended use).

• Only use the product for permissible media.

• If the operating instructions or the technical data are not adhered to, personal injury and/or damage

to property may occur.

• The manufacturer assumes no liability or warranty for any consequences caused by tampering with

the product or incorrect use by the operator.

• Installation, electrical connection, set-up, operation and maintenance of the product must be

carried out by qualified personnel authorised by the machine operator.

• Protect units and cables against damage.

Mechatronic flow sensor SBU3xx

3 Intended use

The unit detects liquid media (glycol solutions, industrial oils, coolants).

It detects the volume flow (flow rate/time) according to the principle of differential pressure and

switches the output.

The switch point is adjustable.

ATTENTION

Frost formation of the medium.

wThe sensor may be damaged.

uEnsure that the medium in the sensor does not freeze during operation and transport.

SBU3xx Mechatronic flow sensor

4 Mounting

CAUTION

During installation or in case of a fault (e.g. housing damage) media under high pressure or

hot media can leak from the system.

wRisk of injury caused by pressure or burns.

uEnsure that the system is free of pressure during installation.

uEnsure that no media can leak at the mounting location during installation.

uEquip the unit with suitable protection (e.g. cover) to avoid hazard to personnel from

leaking media.

4.1 Process connection

The unit provides 5 connections for pipe thread G½.

IN OUT1

OUT2

OUT3

Fig.1: Process connection

1: Connection for additional sensor

2: Inlet

OUT1…OUT3: 3 x outlet for different connection types

The connections 1, OUT2 and OUT3 are equipped with sealing plugs on delivery.

uRemove the sealing plugs if required.

Calming sections on the sensor's inlet or outlet side are not necessary.

Mechatronic flow sensor SBU3xx

5 Electrical connection

The device must be connected by a qualified electrician.

Observe the national and international regulations for the installation of electrical equipment.

Voltage supply according to EN50178, SELV, PELV.

uDisconnect power.

uConnect the unit as follows:

2 1

L+

BN1

4 BK

3 BU

Fig.2: Wiring diagram (colours in accordance with DIN EN60947-5-2)

BN: Brown BK: Black

BU: Blue

Information about available sockets / plugs at www.ifm.com.

SBU3xx Mechatronic flow sensor

6 Settings

There are 2 options to set the switch point:

• Set the switch point on the unit.

• Carry out the flow adjustment.

L/min

L/min 2

Fig.3: Switch point setting

1: Yellow LED (switching status) 2: Setting scale

3: Lock nut 4: Knurl

Do not turn the knurl beyond the maximum value of the setting range (Ò Technical data) to

avoid faulty switching.

6.1 Set the switch point on the unit

uLoosen the lock nut.

uTurn the knurl until the target value just becomes visible on the setting scale.

uTighten the lock nut.

6.2 Carry out the flow adjustment

uLet the normal flow circulate in the installation.

uLoosen the lock nut.

uSet the switch point by slowly turning the knurl:

wThe switch point has been reached as soon as the LED is on.

uTighten the lock nut.

Mechatronic flow sensor SBU3xx

7 Operation

After power on, the unit is ready for operation.

The unit detects the volumetric flow quantity and switches the output according to the setting.

• Output closed (LED = ON), if volumetric flow quantity ≥ switch point.

• Output open (LED = OFF), if volumetric flow quantity < switch point.

SBU3xx Mechatronic flow sensor

8 Maintenance, repair and disposal

The operation of the unit is maintenance-free.

Only the manufacturer is allowed to repair the unit.

uAfter use dispose of the device in an environmentally friendly way in accordance with the

applicable national regulations.

In case of heavily polluted media:

uMount a filter in front of the inlet (IN). Recommendation: use a 200-micron filter.

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