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          Expandable Area SensorPJ series


          Base Unit

          [Discontinued model]

          This model has been discontinued.

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          Base unit

          No. of beam axes


          No. of connectable units

          8 (base unit × 1 + extension unit A or B × 7) or less*1

          Beam axis spacing

          40mm 1.575"*2

          Maximum optical axis number

          32 (PJ-F40 × 1 + PJ-F41 × 7)*3

          Detection area

          120 mm 4.72" (4 optical axes) to 1,240 mm 48.82" (32 optical axes)*4

          Detecting distance


          Detectable object

          Opaque material with a diameter of 48 mm or more

          Light source

          Infrared LED

          Indicator lamp

          A string of 8, 2-color LEDs (red and green) for the transmitter and receiver

          Response time

          When output turned off : 7.5 ms or less, when output turned on : 15 ms or less

          Control output

          Operation mode

          Turned on when light is being applied to all optical axes

          Self-diagnostic output

          Turned off when an error (control output damage, transmitter element or circuit damage, receiver element or circuit damage, ambient light input, cable disconnections, and LSI errors) is detected

          Protection circuit

          Overcurrent protection, surge absorber, reversed polarity protection



          4-core shielded cable (0.5 mm2), length : 7 m, gray sheath


          4-core shielded cable (0.5 mm2), length : 7 m, black sheath


          Use a shielded cable with a nominal cross section of 0.5 mm2 or more to extend the cable by up to 20 m for both the transmitter and receiver.

          Control output

          Output specifications

          Maximum NPN open-collector output : 100 mA (40V or less), residual voltage : 1.0 V or less

          Self-diagnostic output


          Power voltage

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

          Current consumption

          115 mA (total of T, R)

          Environmental resistance

          Enclosure rating


          Ambient light

          Incandescent lamp: 5,000 lux or less, sunlight: 20,000 lux or less

          Ambient temperature

          -10 to +55 °C 14 to 131 °F (No freezing)

          Relative humidity

          35 to 95 % RH (No condensation)

          Vibration resistance

          10 to 55 Hz, Double amplitude 0.7 mm 0.03", 20 times in each of the X, Y, and Z directions

          Shock resistance

          100 m/s2, 1,000 times in each of the X, Y, and Z directions


          Case : aluminum, lens cover : polyarylate


          Approx. 1,400 g

          *1 Mixed expansion at a 20 mm or 40 mm pitch is possible. The number of units that can be connected in a mixed expansion is 8 units or less.
          *2 When the PJ-F41 / F42 has been added to the PJ-F20 / F21, the optical axis pitch of added unit is 40 mm 1.575", and 20 mm 0.787" when the PJ-F21 / F22 has been added to the PJ-F40 / F41.
          *3 When performing mixed expansion at a 20 mm 0.78" or 40 mm 1.57" pitch, there is no limit on the number of axes if the number of connected units is 8 or less.
          *4 With mixed expansion, this becomes 140 mm 5.51" [when the PJ-F20 is used] or 120 mm 4.72" [when the PJ-F40 is used] +20 mm 0.78" x (the number of 20 mm 0.78" pitch extension optical axes) +40 mm 1.57" x (the number of 40 mm 1.57" pitch extension optical axes).

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