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Operating instructions

Airflow monitor

SL5105

80007358 / 0012 / 2021

GB

SL5105 Airflow monitor

2

Contents

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

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

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

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

4 Function ................................................................... 6

5 Installation.................................................................. 7

6 Electrical connection.......................................................... 8

7 Settings.................................................................... 9

Airflow monitor SL5105

3

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

SL5105 Airflow monitor

4

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.

Airflow monitor SL5105

5

3 Intended use

The unit monitors airflows and switches a relay.

SL5105 Airflow monitor

6

4 Function

• The unit detects flow based on the calorimetric measuring principle.

• The unit signals when a set airflow is reached by switching a relay and providing an LED signal:

Flow... Output relay* LED

above the set value • Normally open: relay energises.

• Normally closed: relay de-energises.

green

below the set value • Normally open: relay de-energises.

• Normally closed: relay energises.

red

*Information on the unit type (NO or NC) Ò Technical data at http://documentation.ifm.com.

Airflow monitor SL5105

7

5 Installation

uDrill a hole with a diameter of 24 mm in the pipe.

uMount the unit using the supplied mounting clamp:

• Use the supplied seal for a hermetically sealed installation.

• The sensor head must protrude completely into the airflow and should be in the area of the highest

flow velocity. Installation depth: min. 32 mm, max. 120 mm.

≥32 mm ≤120 mm

Fig.1: Process connection, installation depth

uAlign the unit in the airflow. The arrow on the cap must point in the direction of flow:

arrow

(must be on top)

arrow

potentiometer

potenti-

ometer

LEDs

LEDs

Fig.2: Orientation

≥5 x D ≥3 x D

D

Fig.3: Interference

Structures in the pipe, bends, valves, reducing pieces and the like

affect the function of the unit.

uAdhere to the distances between sensor and interference.

SL5105 Airflow monitor

8

6 Electrical connection

The unit must be connected by a qualified electrician.

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

Voltage supply according to SELV, PELV.

The design of the unit complies with protection class II.

uInsert a miniature fuse according to IEC 60127-2 sheet 1 (≤ 5 A fast acting), if specified in the data

sheet.

uCheck the safe functioning of the unit after a short circuit.

uObserve the applicable standards.

uDisconnect power.

uConnect the unit as follows:

BN

WH

BU

BK

L1

N

L+

L

Fig.4: Wiring diagram (colours to DINEN60947-5-2)

BK: black BN: brown

BU: blue WH: white

Airflow monitor SL5105

9

7 Settings

setting potentiometer

sensitivity

LEDs

Fig.5: Operating and display elements

Flow adjustment for setting the switching point:

uSwitch on the power supply.

uLet the normal flow circulate in the installation and keep it constant.

uContinue with step 1 or 2.

1. If the red LED is on:

uTurn the potentiometer slowly clockwise until the red LED goes out and the green LED comes on.

2. If the green LED is on:

uTurn the potentiometer slowly anti-clockwise until the green LED goes out and the red LED comes

on.

uTurn the potentiometer slowly clockwise again until the red LED goes out and the green LED

comes on.

If fluctuations which may result during operation shall be compensated for:

uWhen the green LED has come on, continue to turn the potentiometer clockwise.