SunX EX-21A, EX-21B, EX-29A, EX-22A, EX-29B User guide
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INSTRUCTION MANUAL
Ultra-compact Photoelectric Sensor Amplifier Built-in Type
EX-20 Series
Thank you very much for using SUNX sensors. Please read this Instruction Manual carefully and thoroughly for the correct and optimum use of this sensor. Kindly keep this manual in a convenient place for quick reference.
This product is not a safety sensor. Its use is not intended or designed to protect life and prevent body injury or property damage from dangerous parts of machinery. It is a normal object detection sensor.
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Thru-beam |
Retroreflective |
Diffuse reflective |
Convergent reflective |
Narrow-view reflective |
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Type |
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Diffused beam type Small spot beam type Long distance spot beam type |
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Model |
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Front sensing Side sensing Side sensing Side sensing Front sensing Side sensing Side sensing |
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Light-ON |
EX-21A(-PN) |
EX-23(-PN) |
EX-29A(-PN) EX-22A(-PN) EX-24A(-PN) EX-26A(-PN) EX-28A(-PN) |
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No. |
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Item (Note 1) |
Dark-ON |
EX-21B(-PN) |
(Note 2) |
EX-29B(-PN) EX-22B(-PN) EX-24B(-PN) EX-26B(-PN) EX-28B(-PN) |
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5 to 160mm |
2 to 25mm |
6 to 14mm |
45 to 115mm |
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Sensing range |
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1m |
2m |
30 to 200mm |
With 200 |
200mm |
(Conv. point: 10mm) |
(Conv. point: 10mm) |
With 100 100mm |
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white non-glossy |
With 50 50mm |
With 50 50mm |
white non-glossy paper, |
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(Note 3) |
white non-glossy |
white non-glossy paper, |
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paper |
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paper |
spot diameter ø1mm with |
spot diameter ø5mm with |
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(Note 4) |
setting distance 80mm. |
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setting distance 10mm. |
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Min. ø2.6mm |
Min. ø3mm |
ø15mm or more |
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Min. ø0.1mm Min. ø0.1mm Opaque, |
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opaque object |
opaque object |
Opaque, |
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copper wire |
copper wire |
translucent or |
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opaque or |
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Sensing object |
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transparent object |
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Setting distance |
Setting distance |
translucent object |
translucent or |
Setting |
Setting |
Min. ø1mm |
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between emitter and |
between emitter and |
(Note 3) |
transparent object |
distance: |
distance: |
copper wire wich |
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receiver: 1m |
receiver: 2m |
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10mm |
10mm |
setting distance 80mm |
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Hysteresis |
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15% or less of operation distance |
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Repeatability |
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0.05mm or less |
0.5mm or less 0.3mm or less |
0.1mm or less 0.05mm or less |
0.3mm or less |
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(perpendicular to sensing axis) |
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(Setting distance: 10mm) |
(Setting distance: 10mm) |
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Supply voltage |
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12 to 24V DC± 10% Ripple P-P 10% or less |
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Current consumption |
Emitter: 10mA or less, Receiver: 15mA or less |
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20mA or less |
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EX- A, EX- B, EX-23 |
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EX- A-PN, EX- B-PN, EX-23-PN |
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NPN open-collector transistor |
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PNP open-collector transistor |
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Output |
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• Maximum sink current: 50mA |
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• Maximum source current: 50mA |
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• Applied voltage: 30V DC or less(between output and 0V) |
• Applied voltage: 30V DC or less(between output and +V) |
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• Residual voltage: 1V or less(at 50mA sink current) |
• Residual voltage: 1V or less(at 50mA source current) |
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0.4V or less(at 16mA sink current) |
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0.4V or less(at 16mA source current) |
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Short-circuit protection |
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Incorporated |
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Response time |
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0.5ms or less |
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Operation indicator |
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Orange LED(lights up when the output is ON)(thru-beam type: located on the receiver) |
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Green LED |
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Green LED |
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Stability indicator |
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lights up under stable light received |
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(lights up under stable light received condition or stable dark condition) |
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condition or stable dark condition |
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located on the receiver |
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Sensitivity adjuster |
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Continuously variable adjuster, |
Continuously variable adjuster |
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Continuously variable adjuster |
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located on the emitter |
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Protection |
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IP67(IEC) |
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Ambient temperature |
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–25 to +55˚C(No dew condensation or icing allowed), Storage: –30 to +70˚C |
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Ambient humidity |
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35 to 85% RH, Storage: 35 to 85% RH |
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Emitting element |
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Red LED(modulated) |
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Material |
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Enclosure: Polyethylene terephthalate, Lens: Polyalylate |
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Cable |
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0.1mm2 3-core(thru-beam type sensor emitter: 2-core) cabtyre cable, 2m long |
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Weight |
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Emitter, receiver: 20g approx. each |
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20g approx. |
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Accessories |
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Adjusting screwdriver: 1 No. |
RF-200(Reflector): 1 No. |
Adjusting screwdriver: 1 No. |
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Adjusting screwdriver: 1 No. |
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Adjusting screwdriver: 1 No. |
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Notes: 1) Model Nos. having the suffix ‘-PN’ are PNP output type.
The retroreflective type having the suffix ‘-Y’ at the end of the model No. does not have the reflector RF-200 enclosed with it. Notes: 2) Either Light-ON or Dark-ON can be selected by the operation mode switch (located on the receiver).
Notes: 3) The sensing range and the sensing object of the retroreflective type sensor are specified for the RF-200 reflector. Further, the sensing range is the possible setting range for the reflector. The sensor can detect an object less than 30mm away. However, if the reflector is set 100mm or less away, the sensing object should be opaque.
Notes: 4) In case of using this product at a sensing range of 50mm or less, take care that the sensitivity adjustment range becomes extremely narrow.
EX-24A (-PN) and EX-24B (-PN) are not incorporated with a sensitivity adjuster. If there is a reflective object (conveyor, etc.) in the background, since it may affect the sensing, use these models by keeping enough distance from the reflective object.
If a reflective object is present in the background, the sensing of EX-28A(-PN) and EX-28B(-PN) may be affected. When setting the sensor, make sure to confirm that the reflective object has no effect. In case the reflective object affects the sensing, take measures such as removing the reflective object or coloring it in black, etc.
If sensors are mounted close together and the ambient temperature is near the maximum rated value, provide for enough heat radiation/ ventilation.
Make sure to carry out the wiring in the power supply off condition.
Take care that wrong wiring will damage the sensor.
Verify that the supply voltage variation is within the rating.
If power is supplied from a commercial switching regulator, ensure that the frame ground (F.G) terminal of the power supply is connected to an actual ground.
In case noise generating equipment (switching regulator, inverter motor, etc.) is used in the vicinity of this product, connect the frame ground (F.G.) terminal of the equipment to an actual ground.
Do not use during the initial transient time (50ms) after the power supply is switched on.
Extension up to total 50m (thru-beam type: both emitter and receiver) is possible with 0.3mm2, or more, cable.
Make sure that stress is not applied directly to the sensor cable joint.
Do not run the wires together with highvoltage lines or power lines or put them in the same raceway. This can cause malfunction due to induction.
Take care that the sensor is not directly exposed to fluorescent light from a rapid-starter lamp or a high frequency lighting device, as it may affect the sensing performance.
Avoid dust, dirt and steam.
Take care that the sensor does not come in direct contact with water, oil, grease, or organic solvents, such as, thinner, etc.
EX- 
A, EX- 
B, EX-23 / NPN output type
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Color code |
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(Brown)+V |
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| <![if ! IE]> <![endif]>circuit |
D |
+ |
12 to 24V DC |
(Black) Output (Note) |
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Load |
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| <![if ! IE]> <![endif]>Sensor |
Tr |
– |
±10% |
50mA max. |
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ZD |
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(Blue) 0V |
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Internal circuit
Users’ circuit
Note: The emitter of thru-beam type sensor does not incorporate the output.
. . .Symbols |
D : Reverse supply polarity protection diode |
Symbols . . . |
ZD: Surge absorption zener diode |
Symbols . . . |
Tr: NPN output transistor |
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EX- 
A-PN, EX- 
B-PN, EX-23-PN / PNP output type
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Color code |
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| <![if ! IE]> <![endif]>circuit |
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(Brown)+V |
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ZD |
+ |
12 to 24V DC |
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50mA max. |
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| <![if ! IE]> <![endif]>Sensor |
Tr |
(Black) Output (Note) |
– |
±10% |
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Load |
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D |
(Blue) 0V |
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Internal circuit
Users’ circuit
Note: The emitter of thru-beam type sensor does not incorporate the output.
. . .Symbols |
D : Reverse supply polarity protection diode |
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Symbols . . . |
ZD: Surge absorption zener diode |
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Symbols . . . |
Tr: PNP output transistor |
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Mount using M3 screws. The tightening torque should be 0.5N·m or less.
M3 screws
M3 pan head screws (Note)
Note: When mounting the front sensing type sensor, use M3 pan head screws without washers, etc.
Sensor mounting brackets (optional) are available. In case the sensor is mounted on a sensor mounting bracket the tightening torque should be 0.5N·m or less.
Sensor mounting bracket for front sensing type
MS-EX20-1 |
MS-EX20-3 |
Material: Stainless steel |
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(SUS304) |
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Two M3 (length 5mm) |
Material: Stainless steel (SUS304) |
pan head screws |
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[stainless steel (SUS304)] |
Two M3 (length 5mm) pan head screws |
are attached. |
[stainless steel (SUS304)] are attached. |
Sensor mounting bracket for side sensing type
MS-EX20-2
Material: Stainless steel (SUS304)
Two M3 (length 14mm) screws with washers [stainless steel (SUS304)] are attached.
MS-EX20-4
MS-EX20-5
[For EX-23 (-PN)]
Swivel:
360° rotation
Material:
Die-cast zinc alloy
Height adjustment: 15mm approx.
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Material: Nylon 6 |
Material: Stainless steel (SUS304) |
Two M3 (length 12mm) screws with washers |
[stainless steel (SUS304)], |
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Two M3 (length 14mm) |
one M3(length10mm) hexagon-socket-head bolt |
screws with washers |
[stainless steel (SUS304)], and |
[stainless steel (SUS304)] |
one M3 hexagon nut [stainless (SUS304)] are |
are attached. |
attached. |
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