KD501A - Capacitive proximity sensor IFM - Free user manual and instructions

Product type	Capacitive proximity sensor
Brand	IFM
Model	KD501A
Detection function	Contactless detection of conductive and non-conductive materials
Detectable materials	Metals, plastics, glass, ceramics, wood, paper, oils, greases, water, aqueous fluids
Output	Normally open (NO) or normally closed (NC), programmable
Output technology	PNP/NPN or 2-wire AC/DC depending on version
Indication	Yellow LED (switching status)
Range adjustment	By potentiometer
Supply voltage	10-30 V DC (DC version) or 20-250 V AC/DC (AC/DC version)
Short-circuit protection	Yes, internal pulsed protection
Mounting	Flush or non-flush
Electrical connection	2 or 3 wires depending on version; connector possible
Safety instructions	Installation by qualified electrician, disconnect power before connection
Maintenance	No maintenance required; keep active face clean
Reparability	Not repairable
Disposal	According to applicable national regulations

Frequently Asked Questions - KD501A IFM

What materials can the KD501A detector detect?

The capacitive sensor contactlessly detects metals, almost all plastics, glass, ceramics, wood, paper, oils, greases, water, and all aqueous fluids.

How to program the NO/NC output?

Depending on the connection type, programming is done via shunt in the connector (for type KI) or via electrical connection (for types KDE, KGE). At delivery, the output is usually programmed as normally open (NO).

What is the supply voltage of the KD501A?

The supply voltage depends on the version: 10-30 V DC for DC versions (3-wire) or 20-250 V AC/DC for AC/DC versions (2-wire). Use a stabilized and well-smoothed voltage.

How to adjust the detection range?

Use the potentiometer located on the device (e.g., type KB) with the provided screwdriver. Turn in the + direction to increase the range, in the - direction to reduce it.

What does the yellow LED on the sensor mean?

The yellow LED indicates the switching output status: on = output active (object detected), off = output blocked (no object).

Is the sensor protected against short-circuits?

Yes, ifm ranges with overload and short-circuit protection have an internal pulsed protection ensuring non-destruction in case of short-circuit.

What maintenance is required for the KD501A?

The device requires no maintenance. Simply ensure that the active face and the free space are free of any deposits or foreign bodies.

Can the device be repaired in case of failure?

No, the device cannot be repaired. In case of malfunction, it must be replaced.

What minimum distance should be maintained between two sensors?

When several sensors of the same version are mounted, maintain a minimum distance of 3 x S_n (nominal range) to avoid interference. For type KD, a distance of 3 x d (diameter) is recommended.

How to dispose of the sensor at end of life?

Ensure environmentally friendly disposal according to applicable national regulations. The device does not contain any parts requiring special treatment.

USER MANUAL KD501A IFM

Operating instructions

Capacitive sensors

Simple line drawing of a rectangular object with a small protrusion on the left side (no text or symbols)

Inhalt

+U_B ② ③ 0V

Pure electrical circuit lines without any symbols

Diagram showing a device with labeled components and an electrical symbol, marked as figure 2.

AC; DC NPN 1 2 3 4 5 N+ L1 L-

AC: DC NPN 1 2 3 4 5 N+ L1- t

DC PNP 1 2 L+ 3 4 5 L-

DC PNP 1 2 L+ 3 4 5 L-

1 L+ 4 3 L-

BN L+ BK BU L-

Technical diagram showing two views of a mechanical component with labeled parts ① and ②

Technical diagram showing a mechanical component and its cross-sectional view with labeled parts 1 and 2.

LED1:

Potentiometer2:

Einstellungen6

Schaltabstand6.1

1 Safety instructions ....3
2 Functions and features ....4
3 Installation....4

3.1 Notes on flush and non-flush installation ....4

4 Electrical connection ....5

4.1 Wiring ....5
4.2 Programming 6
4.3 Type KI (with connector) 6

4.3.1 Programming via the link in the connector ....6

4.3.2 Programming via wiring (KGE - DC PNP/NPN) 6

4.4 Type KDE - two-wire technology 6
4.4.1 Programming via wiring (KDE - AC/DC PNP/NPN) 6
4.5 Type KDE - three-wire technology ....7
4.5.1 Programming via wiring (KDE - DC PNP/NPN) 7
4.6 Type KIE / KGE 8
4.6.1 Programming via the wire link 8

5 Operating and display elements ....8
5.1 Example type KB 8
6 Settings....9
6.1 Sensing range ....9
7 Operation....9
8 Maintenance, repair, disposal ....9
9 Definitions....9

Preliminary note

An instruction is indicated by "▶":•

Example: ▶ Check whether the unit operates correctly.

A reaction to the action is indicated by ">":•

Example: > Yellow LED lights.

Important note

Non-compliance can result in malfunctions or interference.

Information

Supplementary note.

Safety instructions1

Please read the product description prior to set-up of the unit. Ensure that the product is suitable for your application without any restrictions.

The unit conforms to the relevant regulations and EC directives.

Improper or non-intended use may lead to malfunctions of the unit or to • unwanted effects in your application.

That is why installation, electrical connection, set-up, operation and maintenance of the unit must only be carried out by qualified personnel authorised by the machine operator.

Functions and features2

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

Installation3

Notes on flush and non-flush installation3.1

In case of flush installation of non-flush units the sensor properties change and the sensor can remain permanently switched (loss of function).

Observe the free space around the sensing face.

flush1:

non-fl ush2:

S_n : nominal sensing range (see data sheet)

d: unit diameter

Observe the minimum distances when installing several sensors of the same type.

3 x Sₙ

d3xdd

S_n : nominal sensing range (see data sheet)

d: unit diameter

Observe the minimum distance when installing the type KD ▶

3 x Sn ①

1: sensor type KD (only non-flush installation)

UK

The distances need to be determined by the user in his application.

Electrical connection4

The unit must be connected by a qualified electrician. The national and international regulations for the installation of electrical equipment must be adhered to.

Disconnect power.

Connect the sensor according to the indications on the type label.

Note: use a miniature fuse according to the technical data sheet, if specified. Recommendation: check the safe functioning of the unit after a short circuit.

Wiring 4.1

2-wire

technology

3-wire

techni

+U_B/L1 ① ② ③ 0V/N

+U_B ② ③ 0V

miniature fuse (for AC units)1:

negative switching2:

positive switching3:

Programming4.2

Type KI (with connector)4.3

Programming via the link in the connector4.3.1

Simple line drawing of a device with a switch and circular button (no text or symbols)

Diagram showing a device with labeled components and an electrical symbol

programmed as normally open (factory setting)1:

programmed as normally closed2:

Programming via wiring (KGE - DC PNP/NPN)4.3.2

graph TD
    A["Input"] --> B["γ₃"]
    A --> C["γ₄"]
    B --> D["L+"]
    C --> E["L-"]

2/4 L+ 1/3 L-

Type KDE - two-wire technology4.4

Programming via wiring (KDE - AC/DC PNP/NPN)4.4.1

AC; DC NPN 1 2 3 4 5 N+ L1 L-

AC; DC NPN 1 2 3 4 5 L+ L1- t

DC PNP 1 2 L+ 3 4 5 L-

DC PNP 1 2 L+ 3 4 5 L-

Type KDE - three-wire technology4.5

Programming via wiring (KDE - DC PNP/NPN)4.5.1

NPN 1 L- 2 3 4 5 L+ NPN

NPN 1 2 3 4 5 L- L+

PNP 1 L+ 2 3 4 5 L-

PNP 1 L+ 2 3 4 5 L-

graph TD
    A["Switch"] --> B["Component 1"]
    A --> C["Component 2"]
    A --> D["Component 4"]
    B --> E["L+"]
    C --> F["L-"]

1 L+ 4 3 L-

BN L+ BK BU L-

Core colours of ifm sockets:

BN (brown), BU (blue), BK (black).

Type KIE / KGE4.6

Programming via the wire link4.6.1

Technical diagram showing two views of a mechanical component with labeled parts ① and ②

programmed as normally open (wire link closed, factory setting)1:

programmed as normally closed (wire link open)2:

Use an appropriate tool to disconnect the wire link.

Operating and display elements5

Example type KB5.1

Technical diagram showing a mechanical component and its cross-sectional view with labeled parts 1 and 2.

LED1:

potentiometer2:

Settings6

Sensing range6.1

Set the sensing range via the potentiometer using the enclosed screwdriver.

① - Φ + ② - Φ +

increase the sensing range1:

reduce the sensing range2:

Operation7

Check whether the unit operates correctly. Bring about a sensor response by taking suitable measures.

Display by LEDs:

LED yellow out: switching output disabled

LED yellow on switching output enabled

Maintenance, repair, disposal8

The operation of the unit is maintenance-free. To ensure a correct function:

keep the sensing face and a clear space, if any, free from deposits and foreign bodies.

It is not possible to repair the unit.

After use dispose of the unit in an environmentally friendly way in accordance with the applicable national regulations.

Definitions9

Active zone

Area above the sensing face in which the sensor reacts to the approach of the target.

Output function

Normally open: object within the active zone - output switched.

Normally closed: object within the active zone - output blocked.

Programmable: choice between normally closed or normally open.

Positive switching: positive output signal (to L-).

Negative switching: negative output signal (to L+).

Power-on delay time

The time the sensor needs to be ready for operation after application of the operating voltage (in the millisecond range).

Hysteresis

Difference between the switch-on and the switch-off point.

Leakage current

Current for the internal supply of 2-wire units, also flows through the load when the output is blocked.

Current consumption

Current for the internal supply of 3-wire DC units.

Switch point drift

Shifting of the switch point owing to changes of the operating conditions (e.g. temperature, pressure, air humidity).

Short-circuit protection

ifm sensors which are protected against excessive current by means of a pulsed short-circuit protection. The inrush current of incandescent lamps, electronic relays and low resistance loads may cause this protection to cut in and turn the sensor off!

Operating voltage

The voltage range in which the sensor functions safely. A stabilised and smoothed direct voltage should be used! Take into account residual ripple!

Technical data and further information at www.ifm.com → Select your country → Data sheet direct:

UK

Contenu

+U_B ② ③ 0V

Simple line drawing of a device with a switch and circular button (no text or symbols)

Diagram showing a device with labeled components and an electrical symbol

AC; DC NPN 1 2 3 4 5 N+ L1 L-

AC; DC NPN 1 2 3 4 5 L+ L1- t

DC PNP 1 2 L+ 3 4 5 L-

DC PNP 1 2 L+ 3 4 5 L-

Type KDE - technologie 3 fils4.5

1 L+ 4 3 L-

BN L+ BK BU L-

Technical diagram showing two views of a mechanical component with labeled parts ① and ②

Technical diagram showing a mechanical component and its cross-sectional view with labeled parts 1 and 2.

LED1:

Potentiomètre2:

Réglages6

Portée6.1

Zone active / face active