OW0004 - Infrared detector IFM - Free user manual and instructions

Brand	IFM
Model	OW0004
Category	Infrared detector
Type	efector600® OWS / OWL
Switching temperature	350°C / 750°C depending on variant
Opening angle	0.6° to 2° depending on variant
Detection distance	Up to 5 m (beyond, atmospheric losses)
Detection diameter	Depends on angle and distance
Supply voltage	DC 10-30 V (PNP/NPN) or AC/DC 24 V
Output	Switch (PNP, NPN, or AC/DC depending on model)
Short-circuit protection	No (for AC/DC version) – risk of destruction
Electrical connection	3 wires: BN (brown), BU (blue), BK (black), GN/YE (green/yellow)
Mounting	Aim at object, optional base (ref. E20426)
Recommended accessories	Mounting base E20426, protective sleeve E20427
Maintenance	Clean optics with compressed air via protective sleeve
Environmental conditions	Avoid dust, vapor, parasitic thermal radiation
Dimensions (estimated)	Length 80 mm, diameter 30 mm
Weight (estimated)	200 g
Housing material	Metal (stainless steel or brass)
Protection degree	IP65 (estimation)
Repairability	Spare parts: base and protective sleeve available
Recommended fuse	According to datasheet, protect the power supply

Frequently Asked Questions - OW0004 IFM

How to install the OW0004 infrared detector?

Aim the detector at the object to be detected and mount it using the optional mounting base (ref. E20426). Ensure the object temperature is at least equal to the switching temperature (350°C or 750°C depending on variant).

What is the maximum detection distance?

Up to 5 meters for reliable detection. Beyond that, radiation losses in the air require an object temperature significantly higher than the switching temperature.

How to electrically connect the detector?

Power off the installation. Connect according to the diagram: for DC PNP (brown = L+, blue = L-, black = output), for DC NPN (identical), for AC/DC (brown = L1/L+, blue = N/L-, black = output). The green/yellow wire is ground. Use a fuse according to the datasheet.

What to do in case of parasitic background radiation?

If parasitic radiation (e.g., from an oven) disturbs detection, use a detector with a higher switching temperature or a protective sleeve (ref. E20427) with compressed air to clean the optics.

How to calculate the detection diameter?

Use the formula: d = 2 * I * tan(α/2) + ∅, where I is the distance, α the opening angle, and ∅ the lens diameter. The table in the manual gives typical values.

Is the detector short-circuit protected?

The AC/DC version is not protected; a short circuit can immediately destroy the device. For DC versions, check the datasheet. It is recommended to insert a fuse.

What accessories are available for this detector?

A mounting base (ref. E20426) and a protective sleeve (ref. E20427) are available as options. The sleeve allows blowing compressed air to clean the optics in dusty environments.

How to maintain the detector?

Use the protective sleeve with compressed air to clean the lens. Avoid accumulation of dust or vapor. Check proper operation regularly.

What is the meaning of the indicators or outputs?

The detector switches when it detects a sufficient temperature. The output is either PNP (positive switching), NPN (negative switching), or AC/DC depending on the model. No indicator is mentioned in the manual.

What to do if the device does not detect correctly?

Check the orientation, distance, object temperature, and absence of parasitic radiation. If necessary, use a detector with a higher switching temperature. Ensure the optics are clean.

USER MANUAL OW0004 IFM

Pure technical line drawing of a mechanical component without any text, numbers, or symbols

Function and features

Infrared heat sensors absorb the heat radiation of objects and convert it into a switching signal.

They are used for object detection or temperature monitoring.

Switching temperature 350^ C/ 750^ C (depending on the type of unit).

Installation

Align the sensor towards the object to be detected and mount it. A special mounting base is available as accessory (order no. E20426) for simple mounting.

The object must at least have the switching temperature of the sensor and must cover the visible area which depends on the chosen angle of aperture and sensing distance.

Calculation of diameter of visible area/sensing distance/angle of aperture

$$ d = 2 \times I \times \tan \frac {\alpha}{2} + \varnothing $$

$$ I = 0. 5 \times \frac {d - \varnothing}{\tan \frac {\alpha}{2}} $$

$$ \alpha = 2 \times \tan^ {- 1} \left(\frac {d - \emptyset}{2 \times I}\right) $$

α = angle of aperture

I = sensing distance

d = diameter of visible area

∅ = lens diameter

Sensing range diagram:

In the event of ranges of >5m radiation losses must be taken into account. The temperature of the object should therefore be much higher than the switching temperature of the sensor.

Electrical connection

Disconnect power, then connect the unit according to the wiring diagram.

DC PNP

graph TD
    A["Input Line"] --> B["Node 1"]
    A --> C["Node 2"]
    A --> D["Node 3"]
    B --> E["L+"]
    C --> F["L-"]
    D --> G["Load Resistor"]

DC NPN

graph TD
    A["Symbol"] --> B["1"]
    A --> C["2"]
    A --> D["3"]
    B --> E["L+"]
    C --> F["L-"]
    D --> G["L-"]

AC/DC*

Note: insert a miniature fuse according to the technical data sheet, if specified.

Recommendation: check the unit for reliable function after a short circuit.

Core colours of ifm sockets: BN = brown, BU = blue, BK = black,

GN/YE = green/yellow.

*Output not short-circuit protected.

Short circuit can lead to immediate destruction of the unit.

Operation

Check the safe functioning of the sensor.

If in the application wrong switching occurs due to background radiation (e.g. ovens), use units with higher switching temperatures.

For applications in difficult environments (e.g. dust, vapour) or in the event of heat reflections of the environment use infrared heat sensors with a protective tube (order no. E20427).

If necessary, keep the optics clean by means of passing compressed air into the connection piece of the protective tube.