Expandable Area SensorPJ series


Expansion Unit


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Number of optical axes


Beam axis spacing

40 mm max.*1

Maximum optical axis number

28 optical axes (PJ-50A x 1) +
(PJ-55A + PJ-56) *2

Detection area

Detecting distance

5 m

Detectable object

Opaque materials (50 mm dia. min.) *3

Light source

Infrared LED

Indicator lamp

Output (PJ-50AR)/Power (PJ-50AT) : Red LED, Stable operation (PJ-50AR) : Green LED

Response time

15 ms or less


Control output

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


Operation mode

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

Noise resistance (power supply line)

350 V, 1 µs (noise simulator)

Protection circuit

Reversed polarity, overcurrent protection, surge absorber


Power voltage

12 to 24 VDC ±10%, Ripple (P-P) : 10% max.

Current consumption

50 mA (PJ-56T : 10mA, PJ-56R : 40 mA) (total of T, R)*4

Environmental resistance

Enclosure rating


Operating ambientluminance

Incandescent lamp : 3500 lux max., Sunlight : 12000 lux max.

Operating ambient temperature

-20 to +50°C (no freezing)

Operating ambient humidity

35 to 85 % RH (No condensation)


10 to 55 Hz, 1.5 mm double-amplitude in X,Y and Z directions, 2 hours respectively

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


PJ-56T : Approx 120 g
PJ-56R : Approx 125 g*5

*1 The optical axis pitch of the hinged section may be 40 mm or more depending on the mounting method.
*2 Up to two PJ-56 units can be used with each set of expandable area sensors.
*3 When the optical axis pitch of the hinged section is 40 mm .
*4 When supply voltage is 24 VDC. (When supply voltage is 12 VDC : 80 mA with, 20 mA with PJ-55A, 45 mA with PJ-56
*5 For models PJ-50AT and 50AR, the weight of the 5-m cable is included.

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