OB5028 - Amplifier IFM - Free user manual and instructions

USER MANUAL OB5028 IFM

• 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 thresholdENGLISH

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

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).

BAutomatic 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. 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.

Allow the objects to pass trough the detection area. Press until the row of LEDs flashes. Press once. Press once. Yellow and green LEDs flash alternately (= unit is in the programming mode). Yellow and green LEDs go out for a short time, then flash again alternately. Yellow and green LEDs go out for a short time, then the green LED is on (= unit is in the operating mode).ENGLISH Automatic setting of the switching threshold (2)

• 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.

• 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.

Place the object into the detection area.* Press until the row of LEDs flashes. Press once. Press once. Yellow and green LEDs flash alternately (= unit is in the programming mode). Yellow and green LEDs go out for a short time, then flash again alternately. Yellow and green LEDs go out for a short time, then the green LED is on (= unit is in the operating mode). Remove the object.*Manual setting of the switching threshold (1)

Press until the row of LEDs flashes. Green LED flashes, yellow LED indicates the switching status (= unit is in the programming mode).

Place the object into the detection area. Object signal is measured and indicated (= row of dimly lit LEDs) brightly flashing LED = current switching threshold.

Press until the row of LEDs flashes. Green LED lights (= unit is in the operating mode).

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).

Remove the object. Background signal is measured and indicated (= row of dimly lit LEDs).ENGLISH Manual setting of the switching threshold (2)

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

Press until the row of LEDs flashes. Green LED flashes, yellow LED indicates the switching status (= unit is in the programming mode).

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

Place the object into the detection area. Press the “+” button until the unit switches (yellow LED lights or goes out).

Press until the row of LEDs flashes. Green LED lights (= unit is in the operating mode).Adjust of the pulse stretching Operation Only open the cover to make adjustments. Close it after the adjust- ment 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.

Press until the row of LEDs flashes. Yellow and green LEDs flash alternately (= unit is in the programming mode).

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. time (ms) lit LEDs