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          Expandable Area SensorPJ series

          PJ-L21

          Expansion Unit

          [Discontinued model]

          This model has been discontinued.

          Recommended Replaceable Products
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          SPECIFICATIONS

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          Model

          PJ-L21

          Type

          Extension unit A

          No. of beam axes

          8

          No. of connectable units

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

          Beam axis spacing

          20mm 0.787"*2

          Maximum optical axis number

          64 (PJ-L20 × 1 + PJ-L21 × 7)*3

          Detection area

          140 mm 5.512" (8 optical axes) to 1260 mm 49.6" (64 optical axes)

          Detecting distance

          7m

          Detectable object

          Opaque material with a diameter of 28 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

          Cable

          Transmitter

          Receiver

          Extend

          Control output

          Output specifications

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

          Rating

          Power voltage

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

          Current consumption

          30 mA (total of T, R)

          Environmental resistance

          Enclosure rating

          IP65

          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

          Material

          Case : aluminum, lens cover : polyarylate

          Weight

          Approx. 320 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 or 40 mm pitch, there is no limit on the number of axes if the number of connected units is 8 or less.

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