IFM SI5012 User manual

Operating instructions
Flow monitor
SI5012
11458840 / 0005 / 2022
GB

SI5012 Flow monitor
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Contents
1 Preliminary note ............................................................. 3
1.1 Symbols used.......................................................... 3
1.2 Warnings used ......................................................... 3
2 Safety instructions............................................................ 4
3 Intended use................................................................ 5
4 Function ................................................................... 6
5 Installation.................................................................. 7
5.1 Installation position...................................................... 7
5.1.1 Immersion depth.................................................... 7
5.1.2 Recommended mounting position....................................... 7
5.1.3 Conditionally possible installation position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1.4 Impermissible installation position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2 Interference............................................................ 8
5.3 Process connection...................................................... 8
6 Electrical connection.......................................................... 10
7 Operating and display elements................................................. 11
8 Set-up..................................................................... 12
9 Settings.................................................................... 13
9.1 Changing the switch point................................................. 13
9.2 High-flow adjustment..................................................... 13
9.3 Low-flow adjustment..................................................... 13
9.4 Changing the switching logic............................................... 14
9.5 Restoring factory settings (reset)............................................ 14
9.6 Lock / unlock........................................................... 14
9.7 Remote calibration ...................................................... 14
10 Operation .................................................................. 15
11 Troubleshooting ............................................................. 16
12 Maintenance, repair and disposal................................................ 17

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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
CAUTION
Warning of personal injury
wSlight reversible injuries may result.

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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.

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3 Intended use
The device monitors liquids and gases.

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4 Function
The device detects flow based on the calorimetric measuring principle and switches the output.
For the factory setting the switch point is at LED 7 and the device is set to normally open. The output
can be switched to normally closed function. The switch point LED indicates the switching status:
orange = output closed; red = output open.
With normal flow, the output has the following status:
• output closed for normally open function
• output open for normally closed function.
Fig.1: Flow ≥ SP / normally open function Fig.2: Flow ≥ SP / normally closed function
If the flow velocity decreases, the switching status changes when the value falls below the switch point
SP minus the hysteresis.
Fig.3: Flow < SP / normally open function Fig.4: Flow < SP / normally closed function
The hysteresis changes with the flow velocity and it is essentially influenced by the set
monitoring range. It is 2...5 cm/s for the setting 5...100 cm/s (= factory setting), it increases with
higher flow velocities.
The typical response time of the device is 1 ... 10 s. It can be influenced by the setting of the switch
point:
• Low switch point = quick reaction with rising flow.
• High switch point = quick reaction with falling flow.
See: Changing the switch point (Ò/13).

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5 Installation
CAUTION
During installation or in case of mechanical failure, 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.
5.1 Installation position
5.1.1 Immersion depth
≥12 mm
Fig.5: Immersion depth
• The sensor tip must be completely surrounded by the medium.
• Recommended immersion depths: minimum 12 mm.
5.1.2 Recommended mounting position
Fig.6: Recommended mounting position
• For horizontal pipes: mounting from the side.
• For vertical pipes: mounting in the rising pipe.
5.1.3 Conditionally possible installation position
Fig.7: Conditionally possible installation position
• For horizontal pipes, if the pipe is free from build-up: mounting from below.
• For horizontal pipes, if the pipe is completely filled with medium: mounting from the top.

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5.1.4 Impermissible installation position
Fig.8: Impermissible installation position
• The sensor tip must not be in contact with the pipe wall.
• Do not mount in downpipes that are open at the bottom.
5.2 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.
S
5...10 x D
S
3...5 x D
Fig.9: Inlet and outlet pipe lengths
D: Outside diameter of the pipe
S: Interference
5.3 Process connection
Using process adapters the unit can be adapted to different process connections.
A correct fit of the unit and ingress resistance of the connection are only ensured using ifm adapters.
For small flow rates, ifm adapter blocks are available.
The device is supplied without accessories.
Information about available accessories at documentation.ifm.com.
The optimum function is not ensured when using components from other manufacturers.
2 4
13
Fig.10: Connect the device to the process using the adapter
1: Process connection 2: Adapter
3: Sensor tip 4: Coupling nut
uGrease the threads of the process connection, adapter and sensor. Use a lubricating paste which
is suitable and approved for the application.
Ensure no grease is applied to the sensor tip.
uScrew the suitable adapter into the process connection.

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uPlace the flow monitor onto the adapter and tighten the nut. Tightening torque 25 Nm. Ensure that
the unit is correctly oriented.

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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.
uDisconnect power.
uConnect the unit as follows:
43
2 1
L
1 BN
2 WH
4 BK
3 BU
OUT
IN
L+
Fig.11: Wiring diagram
1: Ub+ 2: Programming wire for remote setting
3: Ub- 4: OUT (PNP): switching signal for flow monitoring
Only use 4-wire sockets without bridge between pin 2 and pin 4.
If 3-wire sockets with a bridge between pin 2 and pin 4 are used, power on of the output stage
triggers the remote calibration.