IFM SI5100 User manual

Operating instructions
Flow monitors
SI5100 UK
80261855 / 00 03 / 2017

2
Contents
1 Preliminary note���������������������������������������������������������������������������������������������������3
2 Safety instructions �����������������������������������������������������������������������������������������������3
3 Functions and features ����������������������������������������������������������������������������������������4
3�1 Application area ��������������������������������������������������������������������������������������������4
3�2 Operating principle flow monitoring ���������������������������������������������������������������4
4 Installation������������������������������������������������������������������������������������������������������������5
4�1 Installation location ����������������������������������������������������������������������������������������5
4�2 Sources of interference in the pipe system ���������������������������������������������������6
4�3 Mounting operation����������������������������������������������������������������������������������������6
5 Electrical connection��������������������������������������������������������������������������������������������7
6 Operating and display elements ��������������������������������������������������������������������������7
7 Set-up and settings for water�������������������������������������������������������������������������������8
7�1 Change the switch point (optional) ����������������������������������������������������������������8
7�2 High flow adjustment (optional) ���������������������������������������������������������������������9
8 Additional settings (optional)��������������������������������������������������������������������������������9
8�1 Low flow adjustment ��������������������������������������������������������������������������������������9
8�2 Configure the switching output ����������������������������������������������������������������������9
8�3 Restore the factory setting (reset) ���������������������������������������������������������������10
8�4 Lock / unlock the unit�����������������������������������������������������������������������������������10
8�5 Remote adjustment �������������������������������������������������������������������������������������10
9 Troubleshooting �������������������������������������������������������������������������������������������������10
10 Operation��������������������������������������������������������������������������������������������������������� 11
11 Maintenance ���������������������������������������������������������������������������������������������������� 11
12 Technical data�������������������������������������������������������������������������������������������������� 11

3
UK
1 Preliminary note
Technical data, approvals, accessories and further information at
www�ifm�com�
►Instructions
> Reaction, result
[…] Designation of keys, buttons or indications
→Cross-reference
Important note
Non-compliance may result in malfunction or interference�
Information
Supplementary note�
CAUTION
Warning of personal injury�
Slight reversible injuries may result�
2 Safety instructions
• 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 environ-
mental conditions without any restrictions�
• Only use the product for its intended purpose (→ 3 Functions and features)�
• Only use the product for permissible media (→ 12 Technical data)�
• 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 unit
must be carried out by qualified personnel authorised by the machine operator�
• Protect units and cables against damage�

4
3 Functions and features
3.1 Application area
The unit monitors the flow of liquid and gaseous media�
3.2 Operating principle flow monitoring
• The unit detects the flow speed to the calorimetric measuring principle and
switches the output: output closed if medium is flowing / output open if no
medium is flowing�
This applies to the unit on delivery: output = normally open�
In case of need you can change the output to normally closed (→ 8.2)�
It then applies: output open if medium is flowing�
• If the flow speed increases, the switching status changes when the switch point
is reached�
• If the flow speed falls again, the switching status changes if the value "SP
minus hysteresis" is reached�
The hysteresis changes with the flow speed 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 speeds�
• The typical response time of the unit 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�

5
UK
4 Installation
Using process adapters the unit can be adapted to different process connections�
• Adapters have to be ordered separately as accessories�
• A correct fit of the unit and ingress resistance of the connection are only en-
sured using ifm adapters�
• For small flow rates ifm adapter blocks are available�
4.1 Installation location
General
• The sensor tip is to be completely
surrounded by the medium�
• Insertion depth of the sensor: minimum
12 mm�
Recommended
• For horizontal pipes: mounting from
the side�
• For vertical pipes: mounting in the rising
pipe�
Conditional
• Horizontal pipe /mounting from the bot-
tom: if the pipe is free from build-up�
• Horizontal pipe /mounting from the
top: if the pipe is completely filled with
medium�
To avoid
• The sensor tip must not be in contact
with the pipe wall�
• Do not mount in downpipes that are
open at the bottom!

6
4.2 Sources of interference in the pipe system
Components integrated in the pipes, bends, valves, reductions, etc� lead to turbu-
lence of the medium� This affects the function of the unit�
Recommendation: Adhere to the distances between sensor and sources of inter-
ference:
D = pipe diameter; S = sources of interference
4.3 Mounting operation
►Ensure that the system is free of pressure during installation�
►Ensure that no media can leak at the mounting location during installa-
tion�
►Grease the threads of the process connection (1), adapter (2) and nut (3)�
The sensor tip (A) must not be in contact with grease�
►Screw the suitable adapter into the process connection�
►Place the flow monitor onto the adapter and tighten the nut� Tightening torque
25 Nm� Ensure that the unit is correctly oriented�

7
UK
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�
►Connect the unit as follows:
Core colours of ifm sockets:
P: programming wire (for remote adjustment → 8.5)
1 = BN (brown), 2 = WH (white), 3 = BU (blue), 4 = BK (black)
Use 4-wire connection cables without a link between pins 2 and 4�
With 3-wire sockets with a link between pin 2 and pin 4 switching of the
output stage triggers the remote adjustment�
6 Operating and display elements
1: Operation display
• The green LEDs indicate the current flow (the LEDs 0 to 9 represent the range between
no flow and maximum flow)�
• A lighting LED indicates the position of the switch point (orange = output closed, red =
output open)�
2, 3: Setting buttons for adjustment and configuration

8
7 Set-up and settings for water
(For media other than water → 8.1 Low flow adjustment)�
►Switch on the supply voltage�
> All LEDs light and go out again step by step� During this time the output is
closed (if configured as normally open)� The unit is in the operating mode�
►Let the normal flow circulate in the installation�
►Check the display and determine further actions�
1
The factory setting is suitable for the appli-
cation�
►No further settings are required�
2
Your normal flow is below the representation
range of the display�
2 setting options:
► Change the switch point (→ 6.1).
► Carry out high flow adjustment (→ 6.2).
3
Your normal flow exceeds the representation
range of the display (LED 9 flashes)�
► Carry out high flow adjustment (→ 6.2).
You can restore the factory setting any time (→ 8.3)�
7.1 Change the switch point (optional)
For the factory setting the switch point is at LED 7� A change makes sense if:
• the display shows example 2�
• the flow fluctuates much or pulsates�
• if a faster response time of the unit is requested (low switch point = fast re-
sponse with rising flow, high switch point = fast response with falling flow)�
►Briefly press the pushbutton [ ] or [ ]�
> The switch point LED flashes�
►Press the pushbutton [ ] or [ ] as often as required� Each press of the
pushbutton shifts the LED by one position in the indicated direction�
If no pushbutton is pressed for 2 s, the unit returns to the operating mode
with the newly set value�

9
UK
7.2 High flow adjustment (optional)
►Let the normal flow circulate in the installation�
►Press [ ] and keep it pressed�
> LED 9 lights, after approx� 5 s it flashes�
►Release [ ]�
> The unit is now adapted to your flow conditions� It passes into the operating
mode, the display should now show example 1�
The adjustment affects the switch point: It is increased proportionally
(maximum up to LED 7)�
→ 8.5 Remote adjustment�
8 Additional settings (optional)
8.1 Low flow adjustment
If the unit is used in media other than water, you should additionally adapt the unit
to the minimum flow�
The following adjustment must only be carried out after the high flow adjust-
ment�
►Let the minimum flow circulate in the installation or ensure flow standstill�
►Press [ ] and keep it pressed�
> LED 0 lights, after approx� 5 s it flashes�
►Release [ ]�
> The unit adopts the new value and passes into the operating mode�
→ 8.5 Remote adjustment�
8.2 Configure the switching output
The unit is delivered as normally open� In case of need you can change the output
to normally closed:
►Press [ ] for at least 15 s�
> LED 0 lights, after approx� 5 s it flashes�
> After 10 s the current setting is displayed: LEDs 5���9 light orange (= output
normally open)�
> After approx� 15 s LEDs 0���4 flash orange�
►Release [ ]� The output is changed to normally closed operation�
For a new changeover repeat the operation�

10
8.3 Restore the factory setting (reset)
►Press [ ] for at least 15 s�
> LED 9 lights, after approx� 5 s it flashes�
> After approx� 15 s LEDs 0���9 flash orange�
►Release [ ]�
> All settings are reset to the factory setting:
- operating area: 5 ���100 cm/s for water
- switch point: LED 7
- output function: NO
- unlocked�
8.4 Lock / unlock the unit
The unit can be locked electronically to prevent unintentional settings�
►Press both setting pushbuttons simultaneously for at least 10 s in the operating
mode�
> The indication goes out, the unit locks or unlocks�
On delivery: unlocked�
8.5 Remote adjustment
You can adapt the unit to new flow conditions any time�
• Apply the operating voltage for > 5 ��� < 10 s to Pin 2 = high flow adjustment�
• Apply the operating voltage for > 10 ��� < 15 s to Pin 2 = low flow adjustment�
This adjustment does not affect the switch point (the relative position is not chan-
ged)�
9 Troubleshooting
If no adjustment is possible, all LEDs flash red� The unit then passes into the
operating mode with unchanged values�
Possible cause aid
Error during installation�
►Read chapter → 4 Installation�
Check whether all requirements have
been met�
The difference between maximum flow and
minimum flow is too small�
►Increase the flow difference and carry
out the adjustment once again�
The sequence high flow /low flow adjust-
ment was not adhered to�
►Carry out the two adjustment operations
again in the right sequence�

11
UK
10 Operation
After every power on all LEDs light and go out again step by step (during this time
the output is closed if configured as normally open)� The unit is then ready for
operation�
In case of power failure or interruption all settings remain�
Operating indicators
Green LED bar: Current flow within the represen-
tation range�
Indication of the switch point (SP):
- LED orange: output closed�
- LED red: output open�
LED 9 flashes: current flow above the
representation range�
LED 0 flashes: current flow far below the represen-
tation range�
Interference indicator
Short circuit at the switching output:
The operating indicator and red LEDs light
alternately�
If the short circuit has been rectified, the unit imme-
diately passes into the normal operating state�
The current operating state is displayed�
Display OFF
(no LED lights):
Operating voltage too low (< 19 V) or failed�
►Check the supply voltage�
11 Maintenance
Recommended maintenance:
►Check the sensor tip for build-up from time to time�
►Clean it using a soft cloth� Stubborn build-up (e�g� lime) can be removed using
a common vinegar cleaning agent�
12 Technical data
Technical data and scale drawing at www�ifm�com�
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