Lanbao PSM-BC40 Red Light | Diffuse Sensor | 40cm

Lanbao PSM-BC40 Red Light – M18 Diffuse Reflection Photoelectric Sensor

The Lanbao PSM-BC40 Red Light is an M18 cylindrical photoelectric sensor designed for 40 cm visible red-light diffuse detection where the light spot helps setup in a metal cylindrical housing. It uses diffuse reflection sensing, 40 cm rated distance, Red light, 640 nm, NPN NO/NC or PNP NO/NC switching, and a 10-30 VDC supply range, giving machine builders a compact sensor format for part presence, package detection, material handling, and automation input signals.

This PSM version uses fixed cable wiring, max. 0.5 ms response time, max. 20 mA consumption current, max. 200 mA load current, short-circuit protection, overload protection, reverse-polarity protection, IP67 protection, and CE certification. For nearby choices in the Lanbao photoelectric range, compare Lanbao PSM-BC40-E2 red-light connector version, Lanbao PSM-BC40 infrared version, and Lanbao PSM-BC100 longer-range sensor before selecting the final sensing mode or wiring format.

Commissioning should be done with the actual target, bracket, cable length, reflector where required, and machine background in place. Confirm the green stability indicator and yellow output indicator, verify the NO/NC wiring mode, and record the final sensor position so replacement units can be aligned consistently during maintenance.

Technical Specifications

Parameter	Value
Series	Lanbao PSM-BC40 Red Light
Model reference	PSM-BC40
Sensor format	M18 cylindrical photoelectric sensor
Housing family	PSM
Detection type	diffuse reflection
Rated or detection distance	40 cm rated distance
Light source	Red light, 640 nm
Spot or target reference	15 x 15 mm at 40 cm
Output type	NPN NO/NC or PNP NO/NC
Response time	max. 0.5 ms
Supply voltage	10-30 VDC
Consumption current	max. 20 mA
Load current	max. 200 mA
Voltage drop	max. 1 V
Circuit protection	Short-circuit, overload, and reverse-polarity protection
Connection	2 m PVC cable
Adjustment	Single-turn potentiometer
Ambient light immunity	Anti-sunlight interference up to 10,000 lux; incandescent interference up to 30,000 lux
Operating temperature	-25 to 55 deg C
Storage temperature	-35 to 70 deg C
Protection and certification	IP67, CE
Material	Nickel copper alloy housing with PMMA filter
SKU variants	Lanbao-PSM-BC40DPBR, Lanbao-PSM-BC40DNBR

Board Layout & Label Guide

• Optical face – Front sensing window for diffuse reflection; keep it clean, aligned, and protected from impact.
• M18 threaded body – Mounts through a bracket or panel using M18 nuts; avoid excessive torque.
• Power indicator – Green LED confirms power and stable operating state during setup.
• Output indicator – Yellow LED shows switching state, short-circuit, or overload reference condition.
• Sensitivity area – Single-turn potentiometer; adjust only after the sensor is mounted in the final position.
• 2 m PVC cable – Fixed cable output for direct cabinet wiring; provide strain relief near moving equipment.
• Brown lead – Connect to the positive 10-30 VDC supply in typical industrial wiring.
• Blue lead – Connect to 0 VDC common and share reference with the input module.
• Black lead – Main switching output to PLC, relay interface, or protected digital input.
• White lead – NO/NC mode reference; Lanbao documentation specifies positive or floating for NO mode and negative for NC mode.
• Installation note – Use the visible red spot to align the sensing point, then tune sensitivity on the real target surface.

Packing List

• 1 x Lanbao PSM-BC40 Red Light photoelectric sensor
• M18 nut set and instruction manual reference
• Current store bundle contents may vary by SKU and warehouse batch

FAQ

Q: What is the Lanbao PSM-BC40 Red Light used for?

A: It is used for industrial object detection in conveyors, packaging machines, fixtures, handling systems, and automated inspection stations.

Q: What sensing mode does this model use?

A: This model uses diffuse reflection sensing with 40 cm rated distance and Red light, 640 nm.

Q: Can it connect to a PLC?

A: Yes. Use a PLC digital input module that matches the selected NPN or PNP output and the 10-30 VDC supply system.

Q: What is the difference between NPN and PNP variants?

A: NPN variants sink current to the input common, while PNP variants source current to the input. Choose the type required by the controller input card.

Q: Is the sensor suitable for harsh equipment areas?

A: It has IP67 protection and CE certification, but the full installation still depends on cable sealing, connector tightening, mounting direction, and enclosure design.

Q: How is NO or NC mode selected?

A: Lanbao documentation uses the white wire as the NO/NC mode reference. Follow the wiring diagram for the exact variant being installed.

Q: Why does the output switch unreliably?

A: Check supply voltage, NPN or PNP wiring, indicator status, target position, and alignment; diffuse sensing depends on target reflectivity, color, angle, and distance.

Q: Should I choose cable or M12 connector?

A: Choose the cable version when fixed wiring is acceptable and the sensor will not be removed frequently.