KN5113 - Detector IFM - Free user manual and instructions

Product type	Capacitive level detector
Brand	IFM
Model	KN5113
Category	Detector
Power supply	DC 10-30 V, 3-wire
Switching output	Normally open (NO) or normally closed (NC), adjustable
Connection	Cable or connector, wires BN (brown), BU (blue), BK (black)
Housing material	Metal (threaded housing)
Thread	M30 (estimation)
Weight	Approx. 100 g
LED indications	Green (power), yellow (output active), red (error / critical zone)
Programming	By push-button, empty/full adjustments, electronic lock
Main functions	Level detection of liquids and bulk solids, automatic adjustment
Operating mode	High/low level switching depending on mounting
Operating temperature	Not specified (estimation -25°C to +70°C)
Protection	IP67 (estimation for threaded housing)
Maintenance	Cleaning of active face, re-adjustment if dirty
Safety	Electronic lock against unintentional programming
Repairability	No spare parts, device replacement
Documents supplied	User manual (23 pages)

Frequently Asked Questions - KN5113 IFM

How do I connect the KN5113 detector?

Connect the brown wire (BN) to a DC 10-30V voltage, the blue wire (BU) to 0V, and the black wire (BK) to the control input. Observe the label on the device.

How do I perform the empty state adjustment?

Power on the device, make sure the tank is empty. Press the programming button with a non-pointed object until the green LED blinks slowly (1 Hz). Release the button. The setting is saved.

How do I perform the full state adjustment?

After the empty adjustment, fill the tank so that the detector senses the fluid. Press the button until the green LED blinks quickly (2 Hz). Release. The full adjustment is optional but recommended for better reliability.

What does a fast blinking red LED mean?

It indicates an adjustment error. Possible causes: signal difference too small between empty and full, reversed adjustment order, or empty adjustment performed with the active face immersed. Press the button or briefly cut power to clear the error.

How to lock the detector against changes?

Hold the programming button pressed for 10 seconds. Release: the green LED turns off, indicating lock. To unlock, hold again for 10 seconds.

How to change the output function from NO to NC?

Power off the device. Reverse the polarity of the power supply (BN to 0V, BU to +). Power on again. The output changes function. Restore normal polarity afterwards.

What to do if the red LED stays on during operation?

A permanently lit red LED signals that the internal signal is close to the switching threshold, which may indicate soiling or a change in range. Clean the active face and repeat the empty/full adjustment.

Can the detector be mounted horizontally?

Yes, horizontal mounting is possible. Refer to the mounting diagram in the manual. After mounting, perform an adjustment to adapt the detector to your application.

What type of fluids can the KN5113 detect?

It detects liquids and dry bulk solids (granules, powders). Avoid highly conductive or corrosive substances without further information.

How to clean the detector?

Clean the active face with a soft cloth and a mild detergent. Avoid aggressive solvents. After cleaning, repeat the empty/full adjustment if necessary.

USER MANUAL KN5113 IFM

Adernfarben: BN = braun, BU = blau, BK = schwarz

3 Montage

1 Function and features 9
2 Electrical connection 9
3 Mounting 10
4 Operation 10
5 Programming 10
6 Set-up/operation 14

(1) Electrical connection (plug or cable)
(2) LEDs red, yellow, green
(3) Programming button
(4) Threaded sleeve
(5) Active face

1 Function and features

The capacitive level switch monitors levels of liquids and dry bulk material in vessels, preferably plastic granulates. Depending on the setting a switched signal is provided when the current level falls below or exceeds the mounting position.

• Automatic adjustment to the medium to be detected by means of programming button.

2 Electrical connection

Disconnect power before connecting the unit (see type label).

Core colours: BN = brown, BU = blue, BK = black

3 Mounting

Mount the proximity switch as shown and then program it.

4 Operation

Adjust the sensor. To do so, press the programming button with a blunt object.

5 Programming

Operating mode

Immediately after power on the proximity switch is in the operating mode. In this mode all normal sensor functions are active.

You can also make the following settings on the unit:

• Adjustment mode

• Switch point setting by adjustment to the empty and full state.

• Locking mode

• Electronic lock to avoid tampering.

• Setting the output function as normally closed or normally open.

Adjustment mode empty state

The sensor is adjusted to the empty vessel. If it detects material, the switched signal changes.

Then carry out steps 1 and 2.

Adjustment mode full state

Fill the vessel so that the sensor detects the material.

Then carry out steps 1 and 2.

Note:

The adjustment to the full state is not absolutely necessary for the operation of the unit but it is recommended. On the basis of the values for the empty state/full state the internal microprocessor determines the optimum position of the switching thresholds. If you use both adjustment criteria (adjustment to the empty and full state), you obtain the maximum operational reliability for your individual application.

Locking mode

The stored adjustment values can be protected against unauthorised programming as follows (output state not locked):

When the programming button is released the unit is locked and all programming functions are inactive. The unit returns to the operating mode.

If this operation starts from the locked state, the green LED does not react at first to avoid any hint to a hidden function.

If you want to release the locking, proceed as follows:

When the programming button is released the unit is unlocked and all programming functions are active again. The unit returns to the operating mode.

Setting the output function as normally closed or normally open

The switching output of the unit can be operated as normally closed or normally open. To do so, the unit must first be disconnected. To generate the inverted output response the operating voltage is connected again by reversing the wires.

Error messages

If the adjustment to the empty or full state is not possible, the red LED flashes quickly after the adjustment attempt (about 2Hz).

To delete this error message press the programming button once or disconnect and then connect power again. The adjustment values successfully read so far remain unchanged.

Possible reasons for an error message:

• The signal difference between the empty and full state is too small (e.g. adjustment to the empty and full state without sufficient change of the level).

• The signal change between the empty and full state is in the wrong order (e.g. adjustment to the empty state when the vessel is full and then adjustment to the full state when the vessel is empty).

• Adjustment to the empty state outside the operating range (e.g. adjustment to the empty state with direct contact with an electrically grounded medium, e.g. if the active face is immersed in water).

Help: Avoid the above-mentioned errors and repeat the adjustment.

Further faults:

• Electronic fault or sensing zone of the unit damaged
• Internal fault (can only be deleted by disconnecting and connecting power again, hardware reset).

6 Set-up / operation

Check the safe functioning of the unit. Display by LEDs.

LED green	ON = unit is ready for operation flashes slowly (1 Hz) = adjustment mode empty state flashes quickly (2 Hz) = adjustment mode full state OFF = locking mode
LED yellow	OFF = switching output disabled ON = switching output enabled
LED red	flashes quickly (2 Hz) = error message ON = undefined operating range
LED yellow and red	flash quickly simultaneously (2Hz) = short circuit of the switching output

The red LED indicates no malfunction of the unit, it indicates that the internal sensor signal is near the switching threshold.

Two cases can be distinguished:

- Normal operation/safe operation

The red LED is lit temporarily during the change between "medium" and "no medium".

- Warning of possible malfunction

If the red LED is lit continuously, the operating conditions are no longer optimum.

For example a change of the sensing range caused by deposits of dirt can be detected.

You can take preventive measures to avoid a malfunction. For example readjust or clean the unit.

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