OJ5144 - Motion detector IFM - Free user manual and instructions

Product Type	Direct reflection motion detector with background suppression
Brand	IFM
Model	OJ5144
Category	Motion detector
Technology	Optoelectronic (direct reflection cell)
Range	Up to 2 m (according to label, measured on white paper 200x200 mm)
Power supply	10-30 V DC
Output	PNP or NPN programmable
Connection	4 wires: BN (brown) = L+, BU (blue) = L-, BK (black) = output, WH (white) = programming
LED indication	Green: device operational; Yellow: switched output; Red: programming or fault
Programming functions	Setting with/without object, maximum range, electronic lock, output function
Mounting	Supplied mounting clip or side holes for screws
Housing material	Plastic
Weight	Approximately 50 g
Dimensions	Approximately 50 x 50 x 20 mm
Operating temperature	-25 °C to 60 °C
Protection rating	IP67
Maintenance	Clean the lenses with a soft, dry cloth
Safety	Disconnect power before any electrical connection
General information	Manual available in several languages on notice-facile.com

Frequently Asked Questions - OJ5144 IFM

How to connect the OJ5144 detector?

Connect the wires as follows: BN (brown) to L+ (10-30 V DC), BU (blue) to L-, BK (black) to output, WH (white) for programming. Always disconnect power before connection.

How to program the detector to detect an object?

1. Press the button for about 2 seconds until the red LED flashes. 2. Place the object and press once. 3. Remove the object and press again. The LEDs confirm the setting.

How to set the maximum range?

In programming mode, point the detector without object or background in the field, then press the button twice. You can also use the programming wire (WH) by connecting it to L+ or L- depending on the PNP/NPN type.

What do the LEDs mean?

Green LED on: device operational. Yellow LED on: switched output. Yellow and red LEDs flash alternately at 2 Hz: short circuit; at 1 Hz: internal error (output not switched).

How to lock the detector to prevent accidental changes?

Activate the programming wire (WH) by connecting it to L+ (PNP) or L- (NPN) for about 15-20 seconds. Repeat the operation to unlock.

What is the detection principle of the OJ5144?

It is a direct reflection detector with background suppression. It emits a light beam and detects objects without contact, even on poorly reflective surfaces.

The detector does not switch, what to do?

Check the power supply (10-30 V DC), wiring (BN, BU, BK, WH), and LED status. An alternating yellow+red flash indicates a short circuit or internal error. Clean the lenses if they are dirty.

How to mount the OJ5144 detector?

Use the supplied mounting clip: secure the clip with screws, then slide the detector until it clicks. For mounting without clip, use the two side holes for M3 screws. Orient the detector perpendicular to the object's movement.

What is the typical range of the OJ5144?

The range depends on the object and its background. The value on the label is measured on white paper 200x200 mm. Typically, it can reach 2 m. For less reflective objects, the range is reduced.

How to clean the detector?

Use a soft, dry cloth to clean the lenses. Avoid solvents or abrasive products. Regular maintenance ensures reliable detection.

USER MANUAL OJ5144 IFM

Function and features

The diffuse reflection sensor detects objects and materials without contact and indicates their presence by a switched signal.

Range (r):

see type label (value referred to white paper 200mm× 200mm ).

Electrical connection

Isolate power, then connect the unit.

DC PNP DC NPN

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

Programming of the output function by push button or programming wire (see page 12).

Installation

* In the following sections installation and set-up are described using the example of the type with front lens. The functions of the units with side lens are identical.

Align the photocell and fasten it to a mounting fixture.

Mounting of the series OJ51xx

The units of the OJ51xx series have two fixing holes on the side for mounting. A mounting fixture is not supplied.

Maximum range is only possible with precise alignment.

The objects to be detected are to move transversally to the lens of the

unit. In case of other directions of movement it should be tested before whether safe functioning is guaranteed.

For demanding applications (small distance between the object and the background) we recommend the following mounting positions:

• In case of shiny background surfaces and less shiny object surfaces the sensor should be mounted vertically to the background surface.
• In case of shiny object surfaces and less shiny background surfaces the sensor should be mounted at an angle of approx. 5 - 10^ .

Installation of the supplied mounting fixture

Secure the mounting fixture with the screws supplied, then slide the unit into the slot of the fixture until the spring clicks home.

To remove the unit press the spring down with a screwdriver and slide the unit out.

Setting of the sensitivity with stationary objects*

1	Activate the programming mode of the unit. Press for about 2s until the red LED flashes.
	The red LED goes out; the yellow and green LEDs flash alternately. The unit is in the programming mode.

2	Setting with object. Press once.
	The yellow and green LEDs go out for approx. 1s, then flash again alternately.

3	Setting without object. The background must be within the maximum range. Press once.
	The yellow and green LEDs go out for approx. 1s, after approx. 3s the green LED is on. The unit is in the operating mode.

You can also proceed in reverse order: first setting without the object, then with the object.

• The sensitivity can also be set in exactly the same way using the programming wire (pin 2 / WH). To activate the functions the programming wire is connected for the appropriate time to L+ (pin 1 / BN) for PNP units or to L- (pin 3 / BU) for NPN units. Feedback: If setting was not successful via the programming wire, the output will switch for 2s. The unit then reverts to the operating mode with the sensitivity unchanged.

If the setting of the sensitivity is not possible (e.g. object signal and background signal are about the same), the red LED flashes after step 3 for approx. 2s. The unit then passes into the operating mode with the sensitivity being unchanged.

If the setting button is not activated for 15 minutes during the programming process, the unit passes automatically into the operating mode with the sensitivity being unchanged.

Setting of the maximum sensitivity*

• Go into the programming mode (step 1).
• Align the unit so that no light is received by the object or the background (min. distance > max. range).

• Press the setting button twice (see steps 2 and 3).

• The maximum sensitivity can also be set in exactly the same way using the programming wire (pin 2 / WH). To activate the functions the programming wire is connected for the appropriate time to L+ (pin 1 / BN) for PNP units or to L- (pin 3 / BU) for NPN units.

Electronic lock

Activate the lock by connecting the programming wire for about 15s - 20s*.

De-activate the lock by connecting the programming wire again for 15s - 20s^* .

• To activate the functions the programming wire (pin 2 / WH) is connected to L+ (pin 1 / BN) for PNP units or to L- (pin 3 / BU) for NPN units for the appropriate time.

Programming the output function*

• The output function can be programmed in exactly the same way using the programming wire (pin 2 / WH). To activate the functions the programming wire is connected for the appropriate time to L+ (pin 1 / BN) for PNP units or to L- (pin 3 / BU) for NPN units.

Operation

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

LED green is lit U	Unit is ready for operation.
LED yellow is lit O	Output is switched.
LEDs yellow + red	Flash alternately, 2 Hz: output short-circuited. Flash alternately, 1 Hz: internal malfunction (output is not switched).

Maintenance

Keep the lens of the sensor free from soiling.