KG5028 - Capacitive proximity sensor IFM - Free user manual and instructions

Product type	Capacitive proximity sensor
Brand	IFM
Model	KG5028
Nominal range	8 mm (on grounded plate or water)
Detectable materials	Metals, plastics, glass, ceramics, wood, paper, oils, greases, water and aqueous materials
Detection principle	Contactless, automatic adaptation to product
Mounting	Non-flush, using a mounting flange
Electrical connection	3 wires: BN (brown), BU (blue), BK (black)
Supply voltage	Typically 10-30 V DC
Output	Switching (NPN or PNP output depending on model – not specified)
LED indicators	Green (operational), Yellow (switching), Red (unsafe zone/error), Red flashing (internal error), Yellow+Red flashing (short circuit)
Programming	Adjustment button: 5 s to enter programming mode, 10 s to lock/unlock
Safety functions	Short circuit detection, accidental programming lock
Maintenance	Keep the active face and clearance zone free of deposits and foreign bodies
Operating temperature	Estimated: -25 to +70 °C
Protection rating	Estimated IP67
Repairability	Spare parts not specified; contact IFM support

Frequently Asked Questions - KG5028 IFM

How to adjust the switching threshold of the KG5028 sensor?

Press the button for 5 s until the yellow and green LEDs flash. Place the product in the detection zone, press briefly. Remove the product until the red LED turns off. Press once to confirm.

What materials can the sensor detect?

It detects metals, plastics, glass, ceramics, wood, paper, oils, greases, water and aqueous materials, without contact.

How to lock the device to prevent accidental reprogramming?

Press the button for 10 s until the LEDs turn off. To unlock, press again for 10 s.

What does the flashing red LED mean?

This indicates an internal error or a setting error. Press the adjustment button once to return to operating mode.

How to wire the sensor?

The wire colors are BN (brown) for power, BU (blue) for neutral, BK (black) for output. Follow the diagram on the label.

What is the nominal range of the KG5028?

8 mm on grounded metal plate or on water. For other materials, the range may be shorter.

Can the sensor be flush mounted?

No, mounting is non-flush. A clearance zone around the active face is required.

What to do if the red LED does not turn off during programming?

If the red LED stays on, the interval between damped and undamped state is too short. Press the adjustment button twice to switch to operating mode without changing the threshold.

How to check proper operation?

Place a detectable object in front of the active face. The yellow LED should light up. Make sure the active face is clean.

What are the mounting conditions for multiple sensors side by side?

Respect the minimum distances specified in the manual to avoid interference.

USER MANUAL KG5028 IFM

Capacitive proximity switch KG/P

Function and features

This proximity switch detects metals, almost all plastics, glass, ceramics, wood, paper, oils, greases, water and all hydrous materials without contact and indicates their presence by providing a switched signal.

• Nominal sensing range (Sn) 8 mm (measured on an earthed metal plate and water; a shorter sensing range for other materials).
• Automatic adjustment to the medium to be detected.

Installation

Mount the unit by means of a mounting device. Secure it by means of the nuts provided so that it cannot work loose. Non-flush installation.

Open space around the sensing face:

Minimum distance when several switches of the same type are mounted:

Electrical connection

Disconnect power before connecting the proximity switch. Connection strictly to the indications on the type label.

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

Adjustment

The unit detects the "damped" state (= medium present) and the "undamped" state (= no medium present) and sets the optimum switch point.

1

Press for 5s.

Yellow and green LEDs flash alternately (= unit is in the programming mode).

2

Place the medium into the detection area of the sensor and press the button briefly.

The yellow and green LED's go out for a short time, then quickly flash alternately; the red LED is on.

3

Remove the medium and increase the distance between the medium and the unit until the red LED goes out.

The yellow and green LED's continue to flash alternately. The red LED goes out.

If the red LED does not go out, the interval between the "damped" and the "undamped" signals is too short. Press the setting button twice. The unit passes into the operating mode with the switch point being unchanged..

4

Press briefly.

The yellow and green LED's go out for a short time, then the green LED is on (= unit is in the operating mode).

Steps 2 and 3 can also be taken in reverse order: first align the unit without the medium being present and then place the medium into the detection area until the red LED goes out.

If the setting of the switch point is not possible (the signals for damped/undamped follow too close), the red LED flashes after step 4 (= adjustment error). Press the setting button once. The unit then passes into the operating mode with the switching point being unchanged.

Locking / Unlocking

The unit can be electronically locked to prevent unwanted adjustment of the set parameters:

Press for 10s.	The yellow and green LED's flash alternately; after 10s the LEDs go out, the unit is locked.
Press for 10s.	After 10s the LED's go out, locking is annulled.

Operation

Check the safe functioning of the switch.

The operation of the proximity switch is maintenance-free. For perfect functioning make sure that:

• the sensing face and the open space are kept free of deposits and foreign bodies, particularly for installation with the sensing face facing upwards.

LED display:

LED green lights unit is ready for operation.
LED yellow lights output is switched.
LED red lights uncertain working range.
LED red flashes internal malfunction, adjustment error.
LED's yellow + red	simultaneous flashing: output is short-circuited.