CAUTIONS
3
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This product has been developed / produced for industrial use only.
Make sure that the power supply is off while wiring.
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 run the wires together with high-voltage lines or power lines or put
them in the same raceway. This can cause malfunction due to induction.
Do not use during the initial transient time (0.7 sec.) after the power sup-
ply is switched on.
Take care that the sensor is not directly exposed to fluorescent lamp
from a rapid-starter lamp, a high frequency lighting device or sunlight
etc., as it may affect the sensing performance.
Extension up to total 100m, or less, is possible with 0.3mm
2
, or more,
cable. However, take care against any noise added to the input wire of
PX-24
,
PX-24ES
,
PX-23ES
or
PX-26
.
Since the voltage drops due to cable extension, make sure that the sup-
ply voltage is within 10 to 31V DC at the sensor.
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Note that a rush current (1.5A approx. at 10V, 5A approx. at 31V) flows
when the power is supplied.
When using several sensors, one sensor should not simultaneously
receive light from more than 25 other sensors.
The sensor must be used where no specular objects, such as, a mirror,
exist in the background beyond the object.
The sensing range varies with color, gloss or size of the object. Check
the sensing range using the actual object before operation.
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Make sure that stress by forcible bend or pulling is not applied to the
sensor cable joint.
This sensor is suitable for indoor use only.
Do not use this sensor in places having excessive vapor, dust, etc., or
where it may come in contact with corrosive gas.
Take care that the sensor does not come in direct contact with oil, grease,
organic solvents, such as, thinner etc., or strong acid, and alkaline.
Within 100m
Extension cable connection
Extension cable
Attached cable,
0.5m long
V
+
-
V: Supply voltage
(Dark color object)
[Sensing range decreases]
(Light color object)
[Sensing range increases]
I/O CIRCUIT DIAGRAMS
4
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PX-22, PX-21
Symbols...D: Reverse supplypolarity protection diode
Z
D1
, Z
D2
: Surge absorption zener diode
T
r1
, T
r2
: NPN output transistor
*1
Non-voltage contact or NPN open-collector transistor
Low (0 to 1V): Sleep condition
High [(supply voltage - 1V) to 31V, or open]: Operational condition
or
D
+
-
10 to 31V DC
Internal circuit
Users' circuit
Load
Load
(Black) OUT 1
(White) OUT 2
(Blue) 0V
(Pink / Violet) Sleep input
(Brown) +V
*1
T
r1
Z
D1
Z
D2
T
r2
100mA max.
100mA max.
Color code
Sensor circuit
٨
PX-24, PX-26
*1
Non-voltage contact or NPN open-collector transistor
Auxiliary area ineffective input
Low (0 to 1V): Area ineffective
High (4.5 to 31V, or open): Area effective
Sleep input
Low (0 to 1V): Seep condition
High [(supply voltage - 1V) to 31V, or open]: Operational condition
or
D
+
-
10 to 31V DC
+
-
(Black) OUT 1
(White) OUT 2
(Black / White) Extraneous light monitor output
(Violet) Auxiliary right OUT 1 area
ineffective input
(Brown) +V
(Pink / Gray) Eternal sensitivity
adjustment input
(Input impedance: 1k
ǡ
approx.)
*1
(Violet / Black) Auxiliary left OUT 1
area ineffective input
(Pink / Violet) Sleep input
T
r1
Z
D1
Z
D2
T
r2
100mA max.
100mA max.
100mA max.
(Blue) 0V
Z
D3
T
r3
0 to +5V DC
6mA max.
Internal circuit
Users' circuit
Load
Load
Load
Color code
Sensor circuit
Symbols...D: Reverse supply polarity protection diode
Z
D1
, Z
D2
, Z
D3
: Surge absorption zener diode
T
r1
, T
r2
, T
r3
: NPN output transistor
٨
PX-24ES, PX-23ES
*1
Non-voltage contact or NPN open-collector transistor
or
Area selection input
Low (0 to 1V): Depends on the logic combination
(Refer to '
EXPLANATION OF FUNCTIONS
' of
٨
External control function
)
High (4.5 to 31V, or open): Depends on the logic combination
(Refer to '
EXPLANATION OF FUNCTIONS
' of
٨
External control function
)
Auxiliary area ineffective input
Low (0 to 1V): Area ineffective
High (4.5 to 31V, or open): Area effective
Sleep input
Low (0 to 1V): Sleep condition
High [(supply voltage - 1V) to 31V, or open]: Operational condition
6
6
D
+
-
10 to 31V DC
+
-
(Black) OUT 1
(White) OUT 2
(Black / White) Extraneous light monitor output
(Pink) Area selection input 1
(Brown) +V
(Pink / Gray) Eternal sensitivity
adjustment input
(Input impedance: 1k
ǡ
approx.)
*1
(Pink / Black) Area selection input 2
(Pink / White) Area selection input 3
(Violet) Auxiliary right OUT 1 area
ineffective input
(Violet / Black) Auxiliary left OUT 1
area ineffective input
(Pink / Violet) Sleep input
T
r1
Z
D1
Z
D2
T
r2
100mA max.
100mA max.
100mA max.
(Blue) 0V
Z
D3
T
r3
0 to +5V DC
6mA max.
Internal circuit
Users' circuit
Load
Load
Load
Color code
Sensor circuit
Symbols...D: Reverse supply polarity protection diode
Z
D1
, Z
D2
, Z
D3
: Surge absorption zener diode
T
r1
, T
r2
, T
r3
: NPN output transistor
