OW0002 - Infrared detector IFM - Free user manual and instructions

USER MANUAL OW0002 IFM

Technical line drawing of a mechanical component with threaded fastener and shaft (no text or symbols)

1 L1 L+ 3 N L- 2

Technical diagram of a mechanical assembly with numbered components labeled 1 to 4

Betrieb

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 500^ C/ 900^ C (depending on the type of unit).

Installation

Mount the switching amplifier outside the hot area (ambient temperature max. 60°C). A special mounting base is available as accessory (order no. E20426) for simple mounting. Mount the fibre optics in the hot area (max. 250°C) in the required sensing distance. Use a lens attachment to extend the distance and to set the switch point more accurately (available as accessory).

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.

Notice! Do not bend the fibre optics sharply.

α d l

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

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

DC NPN

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

AC/DC*

graph TD
    A["Diamond Symbol"] --> B["1"]
    A --> C["2"]
    A --> D["3"]
    B --> E["L1 L+"]
    C --> F["N L-"]
    D --> G["⊥"]

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.

Replacement of fibre optics

Remove the nut 1 and washer 2.

Carefully remove the rubber packing 3 from the connection piece.

Remove the faulty fibre optics 4.

Slide the supplied new nut 1, washer 2, packing 3 onto the replacement fibre optics.

Insert the replacement fibre optics until the end into the hole of the switching amplifier provided for this.

Press the packing 3 into the connection piece.

Secure the replacement fibre optics by tightening the nut 1.

Technical diagram of a mechanical assembly with numbered components labeled 1 to 4

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.

1 2 3 L+ L-

AC/DC*

graph TD
    A["Component"] -->|1| B["L1"]
    A -->|3| C["N"]
    A -->|2| D["L-"]
    B --> E["Ground"]
    C --> F["Ground"]

Technical diagram of a mechanical assembly with numbered components for identification

Fonctionnement