AOTORO EK51-R6M4 (01) PDF Document

The model number AOTORO EK51-R6M4 can be broken down as follows:

EK: Photoelectric switch, Relay contact output type

51: Serial number (design series)

R: Detecting method (Retro reflective)

6: Detecting distance (6m)

M: Control output (Free power relay output)

4: Operation mode (Light ON/Dark ON switch selectable)

The wiring connections for the AOTORO EK51-R6M4 are as follows:

Power (24-240VAC / 24-240VDC):

• Blue wire

• Brown wire

Contact Output (1c):

• Gray wire: N.C. (Normally Closed)

• Black wire: N.O. (Normally Open)

• White wire: COMO (Common)

The AOTORO EK51-R6M4 has a selectable switch for Light ON and Dark ON modes, which affects when the output (TR output) is ON.

Light ON Mode:

• The Operation indicator (LED) and TR output turn ON when the receiver is receiving light from the reflector.

• The Operation indicator (LED) and TR output turn OFF when the light path is interrupted.

Dark ON Mode:

• The Operation indicator (LED) and TR output turn ON when the light path is interrupted.

• The Operation indicator (LED) and TR output turn OFF when the receiver is receiving light from the reflector.

Follow these steps to install and adjust the AOTORO EK51-R6M4:

1. Install the photoelectric sensor and the mirror (e.g., TD-08) so they are facing each other, then supply power to the sensor.

2. Adjust the mirror or the sensor right/left and up/down until the sensor is in the position where its operation indicator turns on.

3. After checking that the unit correctly detects the target, fix both the sensor and the mirror tightly in place.

To set the optimal sensitivity for the AOTORO EK51-R6M4, follow these steps:

1. Even if set to the maximum sensitive position, the sensitivity must be adjusted in accordance with any reflective material in the background.

2. Place the target in the detecting area. Turn the sensitivity adjuster from the minimum (MIN) position until the point where the indicator just turns ON. This is the first switching point.

3. Remove the target from the sensing area. Turn the adjuster until the indicator turns ON. If the indicator does not turn on, the maximum (MAX) position is the second switching point.

4. Set the adjuster to the center position between the two switching points found in steps 2 and 3. This is the optimal sensitivity position.

Parallel Use: If you use more than two AOTORO EK51-R6M4 photoelectric sensors in parallel, the space between them should be more than 30cm to prevent interference.

Highly Reflective Targets: If the reflectance of the target is higher than that of the mirror, it might cause a malfunction by reflecting light back to the sensor, especially when the target is close. To prevent this, ensure there is enough space between the target and the photoelectric sensor. Alternatively, the surface of the target should be installed at an angle of 30 to 45 degrees relative to the sensor’s optical axis.

For safe operation of the AOTORO EK51-R6M4, please adhere to the following precautions:

1. Do not use the sensor in an explosive or flammable gas environment.

2. Never disassemble, repair, or tamper with the product.

3. Keep the supply voltage within the specified rated area.

4. Use a load that is under the specified rated area for the output.

Do not use the AOTORO EK51-R6M4 under the following conditions:

(1) In a place exposed to direct sunlight.

(2) In a place where humidity is high and condensation may occur.

(3) In a place where corrosive gas exists.

(4) In a place where vibration or shock is directly transmitted to the product.

Connection:

• Before applying power, be sure that the supply voltage is less than the maximum rated supply voltage.

• If the photoelectric switch cable must be laid in a tube or duct with a high-tension or power line, this may cause induction, resulting in malfunction or damage. In principle, the cable should be laid separately or shielded.

Mounting:

• Do not apply excessive force (such as hitting with a hammer) to the sensor during installation, as this may damage its water-resistance.

Extending Wires:

• For extending wires, use a wire with a cross section greater than 0.3 sqmm and a total length of less than 100m.

• Do not pull on the wire with strong force.

Switching Regulator: When using a commercially available switching regulator, be sure to ground the FG (Frame Ground) terminals.

Power Supply Reset Time: The AOTORO EK51-R6M4 will begin sensing no later than 100ms after the power is turned on. If the load and the photoelectric switch are connected to different power supplies, the photoelectric switch must always be turned on first.

Turning Off Power: When turning off the power, an output pulse may be generated. It is recommended to turn off the power supply of the load or load line first.

The dimensions of the AOTORO EK51-R6M4 sensor body are:

• Height: 50 mm

• Width: 50 mm

• Depth: 18 mm

• Mounting Holes: Two M6 holes, spaced 42 mm apart.

• Cable: Round cable with a standard length of 2m and a diameter of 6mm.