Expandable Area Sensor

PJ series

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This model has been discontinued.

Recommended Replaceable Products: Base Unit - PJ-50A

Base Unit PJ-50

PJ-50 - Base Unit





Base unit

No. of beam axes


Beam axis spacing

40 mm 1.57"

Maximum optical axis number

16 (PJ-50A × 1 + PJ-55A × 6)

Detection area

120 mm 4.72" (4 optical axes) to 600 mm 23.62" (16 optical axes)

Detecting distance

5 m 16.40'

Detectable object

Opaque material with a diameter of 50 mm or more

Light source

Infrared LED

Indicator lamp

Output (PJ-50R) and power (PJ-50T) : red LED, stable operation (PJ-50R) : green LED

Response time

15 ms or less


Control output

NPN open collector 100 mA max. (40 V max.), Residual voltage : 1 V max.

Control output

Operation mode

LIGHT-ON/DARK-ON (switch-selectable)

Noise resistance (power supply line)

350 V, pulse width : 1 µs (by way of a noise simulator)

Protection circuit

Reversed polarity, overcurrent protection, surge absorber


Power voltage

12 to 24 VDC ±10 %, Ripple (P-P) 10 % or less

Current consumption

90 mA (total of T, R)*1

Environmental resistance

Enclosure rating


Ambient light

Incandescent lamp: 3,500 lux or less, sunlight: 12,000 lux or less

Ambient temperature

-20 to +50 °C -4 to 122 °F (No freezing)

Relative humidity

35 to 85 % RH (No condensation)

Vibration resistance

10 to 55 Hz, Double amplitude 1.5 mm 0.06", 2 hours in each of the X, Y, and Z directions

Shock resistance

100 m/s2, 3 times in each of the X, Y, and Z directions


Housing : Glass-fi bre reinforced plastic, Lens cover : PFA


Approx. 785 g*2

*1 This is the value with a power supply voltage of 24 V. (80 mA for the PJ-50A with a power supply voltage of 12 V.)
*2 This is the weight including the 5 m cord.

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