OB5024 - Amplifier IFM - Free user manual and instructions

Product type	Amplifier for fiber optics
Brand	IFM
Model	OB5024
Dimensions (approx.)	30 x 80 x 60 mm
Weight (approx.)	100 g
Supply voltage	24 V DC
Main functions	Contactless detection of objects; automatic and manual adjustment of switching threshold; adjustable pulse extension (0 or 2-90 ms)
LED indications	Green LED (availability), yellow LED (switching status), red LED (fault/contamination), LED bar (signal level)
Fiber optic connection	IFM fiber optics FE-11 and FT-11-AAJ
Electrical connection	Cable with wires BN (brown), BU (blue), BK (black), VT (violet)
Protection	IP65 (cover closed)
Maintenance and cleaning	Check cleanliness of fiber optics; clean tips with a soft, dry cloth if soiled
Safety	Disconnect installation from power supply before connection; do not open cover under power except for adjustment
General information	Mounting on DIN rail or mounting device

Frequently Asked Questions - OB5024 IFM

How to mount the OB5024 amplifier?

Mount the device on a standard DIN rail or using a provided mounting device.

How to connect the fiber optics?

Unscrew screw A, slide the fibers into openings B until light resistance (O-ring), then advance to the stop (optical elements) and tighten screw A. Ensure direct contact for optimal range.

How to perform automatic adjustment of the switching threshold with passing objects?

Pass the objects through the beam. Press T1 until the LED bar flashes (yellow and green LED flash alternately). Press once; LEDs turn off then flash again. Press once more; if adjustment succeeds, the green LED lights up.

How to perform automatic adjustment with stationary objects?

Press T1 until the bar flashes. Place the object in the beam and press once. Remove the object and press once. If successful, the green LED lights up. The order can be reversed.

How to manually set the switching threshold?

Press T1+T2 simultaneously until the bar flashes (manual prog mode). For FT fiber, place the object, measure signal, then remove object, measure background, adjust with +/- buttons, then press T1+T2 to confirm. For FE fiber, start by setting the lowest threshold with +/-, place object, then confirm.

How to set the pulse extension?

Press T2 until the bar flashes (yellow and green LEDs flash). Use +/- buttons to set the delay (1 press ~1 ms). The LED bar indicates the range. Wait approx. 10 s to confirm.

What do the LEDs mean?

Green LED steady: availability. Yellow LED: switching status (on if switched). Red LED: fault (incorrect adjustment or contamination). LED bar: in programming mode, indicates signal strength. Fast flashing: short circuit; slow: internal error.

What to do if the red LED is on?

The red LED indicates a detection error: incorrect adjustment or contaminated fibers. Check threshold adjustment and clean fiber optic tips. If problem persists, consult the manual.

How to program the output function?

The output function (normally open/closed) is programmed by the wiring of the output wire according to the diagram on the last page of the manual or on the device label.

How to maintain the device?

Regularly check cleanliness of fiber optics and tips. Clean with a soft, dry cloth if necessary. Keep the cover closed to maintain IP65. Avoid shocks and moisture.

USER MANUAL OB5024 IFM

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.
• 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 automatic setting of the switching threshold

T1 + T2: 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.

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, VT = violet.
• Programming of the output function by wiring (see the last page on 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).
			out on 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 the switching status (= unit is in the programming mode).
2	Place the object into the detection area.	%400 ms 90 70 50 30 10 Object signal is measured and indicated (= row of dimly lit LEDs) brightly flashing LED = current switching threshold.
3	Remove the object.	%400 ms 90 70 50 30 10 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).	%400 ms 90 70 50 30 10 Green LED lights (= unit is in the operating mode).
5	Press until the row of LEDs flashes.	out on

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 the switching status (= unit is in the programming mode).

2

Press the “-” button until the row of LEDs indicates the lowest switching threshold.

Press the “-” button until the row of LEDs indicates the lowest switching threshold.

Press the “-” button until the row of LEDs indicates the lowest switching threshold.

3	Place the object into the detection area.	Press the "+" button until the unit switches (yellow LED lights or goes out).		% 400 ms 90 70 50 30 10
				out on or out on

4

Press until the row of LEDs flashes.

→

Green LED lights (= unit is in the operating 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.	0 2 - 10 11 - 20 21 - 30 31 - 40 41 - 50 51 - 60 61 - 70 71 - 80 81 - 90 time (ms) lit LEDs
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 quickly: 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.

PIN2 / VT = fc-output