Self-contained Photoelectric Sensor

PR-G series

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M18 Threaded type Thrubeam M12 Connector Type, 30 m PR-G51CBD

PR-G51CBD - M18 Threaded type Thrubeam M12 Connector Type, 30 m

*Please note that accessories depicted in the image are for illustrative purposes only and may not be included with the product.

Data Sheet (PDF)


CAD Data

  • CE Marking
  • UL Listing(c/us)







Threaded mount type



Cable connection

M12 connector (4 pin)

Detecting distance

30 m 98.43'

Number of control outputs


Output operation

Output 1


Output 2


Response time

1 ms

Sensitivity adjustment

One-turn trimmer (230°)

Spot diameter

Light source

4 elements, Red LED (631 nm)

Light interference prevention function

Indicator lamp

Transmitter: power supply indicator (green)
Receiver: output indicator (yellow),
Stable operation indicator (green)

Control output

NPN + PNP open collector
30 VDC or less, 100 mA or less
Residual voltage: 1.2 V or less at less than 10 mA, 2 V or less at 10 to 100 mA

Stop emission input

Non-voltage input
Input time ON: 1 ms or more,
OFF: 20 ms or more

Protection circuit

Protection against reverse power connection, power supply surge, output overcurrent, output surge, and reverse output connection


Power voltage

10 to 30 VDC, including Ripple (P-P) 10 %

Power consumption

Transmitter: 450 mW max.
(15 mA max. at 24 V, 15 mA max. at 12 V)
Receiver: 360 mW max.
(12 mA max. at 24 V, 15 mA max. at 12 V)

Environmental resistance

Enclosure rating

IP68 (IEC60529), IP69K (DIN40050-9), 4, 6, 13 (NEMA250)*2

Insulation resistance

20 MΩ or more (500 VDC)

Ambient light

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

Ambient temperature

-20 to +70 °C -4 to 158 °F (No freezing)*3

Storage temperature

-20 to +70 °C -4 to 158 °F

Relative humidity

35 to 85 % RH (No condensation)

Withstand voltage

1,000 VAC, 50/60 Hz, 1 min

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

1,000 m/s2, 6 times in each of the X, Y, and Z directions


Instruction Manual, M18 nut, Lock washer


Approx. 85 g

*1 Output 2 is not available on the threaded mount type or M8 3-pin type.
*2 For the connector type, the enclosure rating varies depending on the cable that is used.
*3 When the ambient temperature is 60 °C 140 °F or higher, the device should be powered with no more than 24 VDC and 50 mA.

Data Sheet (PDF) Other Models