OB5021 - Amplifier IFM - Free user manual and instructions

Product type	Fiber optic amplifier
Brand	IFM
Model	OB5021
Series	efector200®
Main function	Contactless detection of objects and materials with switching signal
Output type	PNP or NPN (depending on wiring)
Visual indicators	Red LED (mode/error), yellow LED (switching status), green LED (availability)
Mounting	On standard profile (DIN rail) or mounting device
Fiber optic connection	Only ifm fiber optics type FE-11 (through-beam) and FT-11 (direct reflection)
Power supply	DC 10-30 V (estimation, see manual for exact values)
Protection	IP65 (with cover closed)
Adjustment	Push button for switching threshold adjustment
Maintenance and cleaning	Clean the fiber optics if dirty; check proper operation periodically
Safety	Disconnect the installation from power before any connection
Spare parts and repairability	Compatible ifm fiber optics FE-11 and FT-11; no other spare parts indicated
General information	Range according to the fiber optic used; manual available in PDF

Frequently Asked Questions - OB5021 IFM

How to mount the OB5021 amplifier?

Mount the device on a standard profile (DIN rail) or using a mounting device. Ensure the cover is closed after adjustment to guarantee IP65 protection.

Which fiber optics are compatible with the OB5021?

Only ifm fiber optics type FE-11 (through-beam) and FT-11 (direct reflection) are compatible.

How to adjust the switching threshold?

Place objects in the optical beam or remove them according to the procedure. Press the push button until the red LED flashes, then follow the steps in the manual. The yellow and green LEDs flash alternately during programming.

What do the LEDs on the amplifier mean?

The red LED indicates adjustment mode or an error (incorrect setting, dirt, short circuit, or internal error). The yellow LED indicates switching status (on when the device is switched). The green LED indicates the amplifier is available.

How to electrically connect the OB5021?

Disconnect the installation from power before connection. Follow the indications on the last page of the manual or the label. Wire colors are: BN = brown, BU = blue, BK = black. The output function (PNP/NPN) is programmed by wiring.

What is the range of the amplifier?

The range depends on the fiber optic used. The manual does not give a fixed value; it is determined by the fiber type and installation conditions.

How to clean the amplifier or fiber optics?

Clean the fiber optics if they are dirty, as this may cause an error (red LED on). Use a soft, dry cloth. The amplifier itself does not require special cleaning.

What to do if the red LED stays on?

A red LED on indicates an error: incorrect threshold setting, dirty fibers, output short circuit (fast flashing) or internal error (slow flashing). Check the setting, clean the fibers, and check the wiring. If the problem persists, consult the manual.

Is the amplifier waterproof?

Yes, with the cover closed, the device offers IP65 protection, i.e., protection against dust and water jets.

Where can I download the manual for the OB5021?

The complete manual is available for free in PDF format on notice-facile.com. You can also request a translated version by selecting your language and entering your email address.

USER MANUAL OB5021 IFM

Switching amplifier for fibre optics

Technical line drawing of a mechanical component with threaded end and mounting holes (no text or symbols)

Deutsch Seite

Controls and indicators 7

Mounting 8

Mount the fibre optics 8

Electrical connection 8

Setting of the switching threshold 9, 10

Connection 15

Français

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Rote LED:

The switching amplifier senses objects and materials without contact and indicates their presence by a switching signal.

• Only for the connection of the ifm fibre optics type FE-11 and FT-11.
• Sensing range depends on the fibre optic.

Controls and indicators

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red LED:

• indicates the setting mode
• lights in the uncertain reception zone (maladjustment, soiling of the lens)
• flashes quickly: output short-circuited
• flashes slowly: internal malfunction

yellow LED:

switching status, lights when the output is switched

green LED:

lights when ready for operation

push button: starts the manual setting of the switching threshold

Mounting

Mount the unit on a DIN rail or by means of a mounting fixture.

Mount the fibre optics:

1. Loosen the screw A, fig. 1.
2. Place the fibre optics into the sensor holes B until you feel a slight resistance (O ring), fig. 2.
3. Push the fibre optics until they come to a stop (optical elements) and hold them, fig. 3.
4. Tighten the screw A.

1 A B

Pure electrical circuit lines without any symbols

Pure electrical connector diagram without any text, numbers, or symbols

If the fibre optics are not in contact with the optical elements, the sensing range is reduced.

Electrical connection

Isolate the power, then connect the unit as specified (see the last page or the type label).

• Core colours (for sensors with cable connection): BN = brown, BU = blue, BK = black.
• Programming of the output function by wiring (see the page 15 or the type label).

Setting of the switching threshold (1)

• Objects move through the detection area
• Diffuse reflection fibre (FT ...) and through-beam fibre (FE ...)

The unit detects input signals of various intensity in any sequence and calculates the optimum switching threshold.

1

Allow the objects to pass trough the detection area.Press until the red LED flashes.

→

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

2

Press once.

Yellow and green LEDs go out for a short time, then flash again alternately.

3	Press once.			Yellow and green LEDs go out for a short time,
			[XYYYX]	then the green LED is on (= unit is in the operating mode).

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

Setting of the switching threshold (2)

• Stationary objects
• Diffuse reflection fibre (FT ...) and through-beam fibre (FE ...)

The unit detects input signals of various intensity in any sequence and calculates the optimum switching threshold.

1

Press until the red LED flashes.

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

2

Place the object into the detection area.*Press once.

Yellow and green LEDs go out for a short time, then flash again alternately.

3	Remove the object.*Press once.			Yellow and green LEDs go out for a short time,
				then the green LED is on (= unit is in the operating mode).

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

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

Operation

Only open the cover to make adjustments. Close it after the adjustment has been made in order to maintain the protection IP65.

Check whether the unit functions properly.

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