OA0123 - Motion detector IFM - Free user manual and instructions

Product Type	Photoelectric barrier (non-contact motion detector)
Brand	IFM
Model	OA0123
Range	See label (not specified in the manual)
Power Supply	10–30 VDC (DC devices)
Power Consumption	Indicated by green LED (voltage OK)
Detection Type	Non-contact, by interruption of light beam
Output	Switched (transistor) with yellow LED for switching status
Diagnostic Output	5 Hz signal in case of poor detection (dirt, misadjustment)
Indicator LEDs	Green: voltage OK; Red (receiver): on if light received, flashes if poor reception; Yellow: output switched
Settings	Function selector (S1, S3): sensitivity, output function, timing (delay on activation/deactivation)
Timing	Configurable via selector: delay on rising/falling edge, resettable by pulse
Test Input (Emitter)	Disables light emission for test (DC devices)
Mounting	Receiver on mounting bracket; emitter oriented towards receiver
Electrical Connection	Strictly according to label; provide miniature fuse if specified
Warning	Disconnect installation before connection; check after short circuit
Maintenance	Clean lenses regularly to avoid dirt buildup
Repairability	Spare parts not specified; contact IFM or authorized dealer
Certifications	Not specified

Frequently Asked Questions - OA0123 IFM

How to install the IFM OA0123 motion detector?

First mount the receiver (OAE...) on a mounting bracket, then orient the emitter (OAS...) towards the receiver and fix it. Connect the power supply according to the electrical diagram on the label, respecting polarity. Use a miniature fuse if specified.

What do the LEDs on the receiver mean?

The red LED is on when the light beam is received correctly (no object between emitter and receiver). If it flashes, this indicates degraded reception (dirty lenses, misalignment). The yellow LED lights up when the switching output is active.

How to set the output timing?

Use the selectors S1 and S3. For example, if S3 is set to 'a', the output is delayed after the falling edge of the 'no object' signal. If S3 is set to 'b', the delay applies to the rising edge of the 'object present' signal. The duration t is adjustable (not specified in the manual). A pulse during t resets the timing.

What to do if the red LED on the receiver flashes?

Flashing means poor light reception. First check that the lenses are clean. Then realign the emitter and receiver precisely using the red LED (steady on when aligned correctly). If the problem persists, check for obstacles.

How to test the detector's operation?

Activate the test input (test at L-) on the emitter (only for DC models): the light emission is disabled. If there is no object between emitter and receiver, the red LEDs on the receiver should turn off and the output state should change. This checks the correct functioning of the photocell.

What type of power supply does the OA0123 require?

The detector operates on direct current (DC). The exact supply voltage is indicated on the device label. Generally, it is a voltage of 10 to 30 V DC. The green voltage indicator LED lights up if the power supply is correct.

How to clean the detector lenses?

For reliable operation, clean the lenses of the emitter and receiver regularly with a soft, dry cloth. Avoid abrasive products or solvents that could damage the optical surface. Dirt reduces range and may cause LED flashing.

What does the diagnostic output mean?

The diagnostic output delivers a 5 Hz signal when object detection is degraded (e.g., dirty lenses or misadjustment). As soon as detection becomes reliable again, the output returns to a steady signal. It allows remote monitoring of the system status.

Can the OA0123 be used outdoors?

The manual does not explicitly specify outdoor use. Check the IP rating on the label. If the device is not specifically protected against moisture and dust, it is recommended to install it indoors or in a sealed enclosure.

How to precisely align the emitter and receiver?

After fixing the receiver, orient the emitter towards the receiver. Check alignment using the red LED on the receiver: it should be steady on. If it flashes, readjust the orientation. For optimal range, alignment must be precise. You can use the LED assistance for fine adjustment.

USER MANUAL OA0123 IFM

Through-beam sensor OA

Barrages

photoelectriques OA

Functions and features

The through-beam sensor detects objects and materials without contact and indicates their presence by a switched signal.

Range: see type label.

Controls and indicators

Electrical connection

Disconnect power before connecting the sensor.

Connection strictly to the indications on the type label.

Note: insert a miniature fuse according to the technical data sheet, if specified.

Recommendation: check the unit for reliable function after a short circuit

Installation

Fix the receiver (OAE...) in position.

Align the transmitter (OAS) towards the receiver and tighten in the same way.

Following electrical connection the transmitter can be set exactly by means of the LED display:

• The red LEDs of the receiver light if setting is exact.
• They flash if setting is inexact.
  Maximum range only with precise alignment.

Test input of the transmitter (only for DC units)

By activating the test input (test at L-) the transmitter is deactivated. When no object is in the light beam between transmitter and receiver the LEDs indicating the reception of light must go off and the switching state of the output must change.

Setting

Set the sensitivity, the output function, the time function as well as the type and duration of the time delay.

Switch 3 = a

The signal "no object present" is transferred to the switching output after a delay.

• In the case of S1 = the output switches OFF after the falling edge + t.

• In the case of S1 = the output switches ON after the falling edge + t.

A pulse during the time t triggers the timer again.

Switch 3 = b

The signal "object present" is transferred to the switching output after a delay.

In the case of S1 = the output switches ON after the rising edge + t.
In the case of S1 = the output switches OFF after the rising edge + t.

A pulse during the time t triggers the timer again.

Operation

Check the safe functioning of the through-beam sensor.

Display by LEDs and function check output.

• Green LEDs are lit = supply voltage o.k.
• Red LEDs are lit (receiver) = light reception (no object between transmitter and receiver).
• Red LEDs flashing = reception deteriorating (e.g. by soiling of the lenses or maladjustment).
• Yellow LED is lit = output switched.

The function check output indicates a wrong object detection (soiling of the lenses, maladjustment) by means of a 5 Hz signal.

When the object is again clearly detected, the output provides again a continuous signal.

Maintenance: Keep the lens of the sensor free from soiling.