OB5027 - Detector IFM - Free user manual and instructions

Product type	Fiber optic amplifier
Brand	IFM
Model	OB5027
Category	Detector
Supply voltage	10-30 V DC
Max output current (diagnostic)	10 mA
Pulse extension	0 or adjustable from 2 to 90 ms
LED indicators	Green (availability, reserve capacity), Red (error), Yellow (switching state)
Electrical connection	Cable, colors: BN (brown), BU (blue), BK (black), VT (violet)
Mounting	On DIN rail or mounting bracket
Protection	IP65 (cover closed)
Compatible optical fibers	FE-50 and FT-50
Main functions	Contactless detection, automatic and manual adjustment of switching threshold, pulse extension
Maintenance and cleaning	Clean the optical fibers if dirty
Safety	Disconnect the installation from power before connection
General information	24-page manual in French

Frequently Asked Questions - OB5027 IFM

How to automatically adjust the switching threshold with moving objects?

Pass the objects through the optical beam, then press T1 until the LED ramp flashes. Press twice more: the green LED lights up to indicate operating mode.

How to automatically adjust the switching threshold with stationary objects?

Press T1 until the ramp flashes. Place the object in the beam, press once. Remove the object, press once. The green LED lights up.

How to manually adjust the switching threshold with a direct reflection fiber?

Press T1 until flashing. Place the object, measure the signal. Remove the object, measure the background. Use the + or - buttons to set the threshold in the middle. Press T1 to confirm.

How to adjust the pulse extension?

Press T2 until the yellow and green LEDs flash alternately. Use + or - to adjust the delay (1 press = approx. 1 ms). Wait 10 s: the green LED lights up.

What does the illuminated red LED mean?

The red LED indicates a detection error: incorrect adjustment or dirty optical fibers.

What to do if the LED ramp flashes quickly?

Rapid flashing indicates a short circuit at the output. Check the wiring after disconnecting power.

How to mount the optical fibers?

Unscrew screw A, insert the fibers into holes B until the stop, then tighten screw A. Do not reduce the range by not inserting them fully.

What is the electrical connection?

Disconnect the installation from power. Connection according to colors: BN (brown) = +, BU (blue) = -, BK (black) = output, VT (violet) = diagnostic output.

How to check proper operation?

Observe the LEDs: green on = availability, yellow = switching state. The diagnostic output activates in case of error or short circuit.

What is the IP protection of the device?

The device offers IP65 protection when the cover is closed. Open only for adjustment.

USER MANUAL OB5027 IFM

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

Deutsch

Controls and indicators 10

Mounting 11

Mount the fibre optics 11

Electrical connection 11

Automatic setting of the switching threshold (1) 12

Automatic setting of the switching threshold (2) 13

Manual setting of the switching threshold (1) 14

Manual setting of the switching threshold (2) 15

Adjust of the pulse stretching 16

Operation 16

Français

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-50 and FT-50.
• Sensing range depends on the fibre optic.
• Pulse stretching 0 or adjustable between 2 and 90ms.

(Each input pulse is stretched to the set value).

Controls and indicators

green LEDs:

• in operating mode: excess gain in %
• in programming mode: strength of input signal red LED:
  lights in the uncertain reception zone (maladjustment, soiling of the lens)

T2: starts the setting of the pulse stretching

yellow LED:

switching status, lights when the output is switched

green LED:

lights when ready for operation

T1: starts the manual setting of the switching

T1 + T2: starts the automatic 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.
2. Push the fibre optics into the sensor holes B until you feel a stop and hold them.
3. Tighten the screw A.

If the fibre optics are not in contact with the internal optics, 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, VT = violet.
• Programming of the output function by wiring (see the last page or the type label).
• Load of the function check output (fc-output): max. 10mA.

Automatic 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 row of LEDs 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,
				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 row of LEDs flashes after step 3. The unit then passes into the operating mode with the switching threshold being unchanged.

Automatic 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 row of LEDs 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 row of LEDs flashes after step 3. The unit then passes into the operating mode with the switching threshold being unchanged.

Manual setting of the switching threshold (1)

- Stationary objects / Diffuse reflection fibre (FT ...)

1	Press until the row of LEDs flashes.		Green LED flashes,yellow LED indicates theswitching status(= unit is in theprogramming mode).
2	Place the object into the detection area.		Object signal is measured and indicated (= row of dimly lit LEDs)brightly flashing LED = current switching threshold.
3	Remove the object.		Background signal is measured and indicated(= row of dimly lit LEDs).
4	Press the "+" or "-" button until the switching threshold is in the middle between the background signal and the object signal;(here: reducing the switching threshold).
5	Press until the row of LEDs flashes.		Green LED lights(= unit is in the operating mode).

Manual setting of the switching threshold (2)

- Stationary objects / through-beam fibre (FE ...)

1	Press until the row of LEDs flashes.		Green LED flashes,yellow LED indicates theswitching status(= unit is in theprogramming mode).
2	Press the “-” button until therow of LEDs indicates thelowest switching threshold.
3	Place the object into thedetection area.Press the “+” button until theunit switches (yellow LED lightsor goes out).		or
4	Press until the row of LEDs flashes.		Green LED lights(= unit is in theoperating mode).

Adjust of the pulse stretching

1	Press until the row of LEDs flashes.		Yellow and green LEDs flash alternately (= unit is in the programming mode).
2	Press the "+" or "-" button to set the desired delay time (here: increasing delay time).1 x = about 1ms; hold the button pressed for fast setting.
3	Wait for approx. 10s.		Green LED lights (= unit is in the operating mode).

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. Indication by LEDs and by the function check output:

• Red LED lights: wrong sensing of the object (maladjustment, soiling of the lens).
• Row of LEDs flashes qickly: output short-circuited / slowly: internal malfunction.

The function check output switches in the case of

• wrong sensing of the object (maladjustment, soiling of the lens), reset after the object has been sensed again properly;
• a short circuit of the switching output, reset about 4s after the fault has been eliminated.

DC PNP + Fiberoptik FE... / + fibre optic FE... / + fibre optique FE...

DC NPN + Fiberoptik FT... / + fibre optic FT... / + fibre optique FT...

DC NPN + Fiberoptik FE... / + fibre optic FE... / + fibre optique FE...

PIN2 = fc-output