OB5020 - Amplifier IFM - Free user manual and instructions

Product type	Fiber optic amplifier
Brand	IFM
Model	OB5020
Category	Amplifier
Detection	Non-contact, via fiber optic
Compatible fibers	IFM FE-11 (through-beam) and FT-11 (direct reflection)
Range	Depends on the fiber optic used
Light indicators	Red LED: setup mode, error, short circuit; Yellow LED: switching state; Green LED: availability
Output function	PNP or NPN, programmable via wiring
Mounting	On standard DIN rail or mounting device
Electrical connection	Via cable, wires BN (brown), BU (blue), BK (black)
Protection	IP 65 after closing the cover
Threshold setting	Pushbutton with automatic procedure
Operating conditions	Moving or stationary objects
Operating temperature	Not specified

Frequently Asked Questions - OB5020 IFM

How to mount the fiber optics on the OB5020 amplifier?

Unscrew screw A, slide the fibers into the openings until a slight resistance is felt (O-ring), then advance until the stop (optical elements) and tighten screw A.

What do the different LEDs mean?

Red LED on: detection error (wrong setting or contamination); fast flashing: short circuit; slow flashing: internal error. Yellow LED on: switching state active. Green LED on: device ready.

How to set the switching threshold for moving objects?

Press the button until the red LED flashes (programming mode). Pass the objects through the beam. Press once to confirm the first measurement, then a second time to finish the setting. The green LED lights up in operating mode.

How to set the switching threshold for stationary objects?

Press the button until the red LED flashes. Place the object in the beam and press once. Remove the object and press once. The device calculates the optimal threshold and switches to operating mode.

What to do if the red LED flashes after setting?

This indicates that setting is not possible (object and background signals too similar). The device switches to operating mode without changing the threshold. Check the alignment and cleanliness of the fibers.

What is the electrical connection procedure?

Disconnect the installation from power. Connect the wires according to the colors: BN (brown) for positive supply, BU (blue) for negative, BK (black) for output. The output function (PNP/NPN) is determined by the wiring.

What type of fiber optics is compatible?

Only IFM fiber optics of type FE-11 (through-beam) and FT-11 (direct reflection).

How to mount the device on a DIN rail?

Clip the device onto a standard profile (DIN rail) or use a suitable mounting device. Ensure secure snap-in.

How to clean the amplifier?

Clean the fiber optics with a soft dry cloth. For the device, use a slightly damp cloth without solvent. Avoid contamination of the optical elements.

What is the meaning of the wire colors?

BN (brown) = positive supply; BU (blue) = negative supply; BK (black) = switching output.

USER MANUAL OB5020 IFM

Operating instructions

Switching amplifier for fibre optics

Controls and indicators 7

Mounting

Mount the fibre optics 8

Electrical connection 8

Setting of the switching threshold 9, 10

Connection 15

8

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-11 and FT-11.
• Sensing range depends on the fibre optic.

Controls and indicators

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.

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 through 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, 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).
			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 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.