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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

          Protection circuit

          Overcurrent protection, surge absorber, reversed polarity protection



          4-core shielded cable (0.5 mm2), length : 7 m (for the PJ-L**C, this is a 0.3 m cable with connector), gray sheath


          4-core shielded cable (0.5 mm2), length : 7 m (for the PJ-L**C, this is a 0.3 m cable with connector), 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


          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. 1,230 g*5

          *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).
          *5 This is the weight including the 7 m cord.

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