Description
Keyence LR-W500C | 500 mm Full-Spectrum Sensor
Product Introduction
A sensor replacement can become a controls problem when the connector, output logic, or detection range does not match the original installation. The KEYENCE LR-W500C is the M12 connector version of the LR-W500 full-spectrum photoelectric sensor, designed for non-contact detection at distances from 30 to 500 mm.
KEYENCE specifies a white LED light source, adjustable spot size, selectable NPN/PNP output, and IO-Link 1.1 support. The four-pin M12 connection makes it distinct from the LR-W500 cable version, so confirm the existing cable and control-system interface before ordering a replacement.
For maintenance teams, the LR-W500C can serve as a replacement sensor or a new detection point in compatible automation equipment. However, detection performance depends on target material, surface characteristics, mounting distance, and sensor settings. Verify the application on the actual production target rather than relying on nominal range alone.
LR-W500C
Key Technical Specifications
- Model: LR-W500C
- Series: KEYENCE LR-W
- Sensor Type: Self-contained full-spectrum photoelectric sensor
- Detection Range: 30–500 mm
- Light Source: White LED
- Spot Size: Adjustable
- Approximate Spot Diameter: 3.5 mm at 100 mm; 9 mm at 250 mm; 18 mm at 500 mm
- Connection Type: M12, 4-pin connector
- Control Output: NPN/PNP open collector, selectable
- Output Voltage Limit: 30 VDC or less
- Output Current Limit: 50 mA or less
- Output Logic: N.O./N.C. selectable
- Response Time: Selectable 200 µs, 1 ms, 10 ms, 100 ms, or 500 ms
- Power Supply: 10–30 VDC, including 10% peak-to-peak ripple
- Current Consumption: 65 mA or less at 24 VDC without load; 120 mA or less at 12 VDC without load
- IO-Link: Version 1.1, COM2, 38.4 kbps
- Enclosure Rating: IP65/IP67
- Ambient Temperature: −20°C to +50°C, no freezing
- Ambient Humidity: 35–85% RH, no condensation
- Weight: Approximately 110 g
Specifications are based on KEYENCE’s published LR-W500C model data. Confirm the current regional datasheet and wiring diagram before installation.
Global Sourcing & Live-Test SOP
For used, surplus, or refurbished LR-W500C inventory, verify both the physical sensor and its electrical behavior before releasing it for production use.
5.1 Inbound Verification
- Photograph the full sensor body, label, and connector.
- Confirm the exact model designation.
- Distinguish the M12 connector version from the LR-W500 cable version.
- Inspect the sensing face for scratches, contamination, or impact damage.
- Check the M12 connector threads and contacts for corrosion or mechanical damage.
- Record available serial, lot, and traceability information.
- Confirm whether the mating cable or other accessories are included; do not assume they are supplied.
5.2 Power-Up and Detection Test
- Use a regulated 10–30 VDC supply within the OEM limits.
- Verify the wiring against the KEYENCE instruction manual before energizing.
- Confirm startup and indicator behavior.
- Test detection using a representative target at several distances within the specified range.
- Verify output switching with the intended NPN/PNP configuration.
- Check N.O./N.C. behavior and the configured response time.
- Confirm stable detection under the actual mounting geometry and ambient lighting conditions.
5.3 IO-Link and PLC Diagnostics
- Verify IO-Link master compatibility if IO-Link is used.
- Confirm the sensor’s communication and parameter configuration.
- Check the PLC input type and expected output logic.
- Validate detection status and switching behavior in the controller.
- Record the final sensor settings and any application-specific tuning.
5.4 Extended Run and Final Preparation
- Run repeated detection cycles using the intended target.
- Monitor for intermittent switching, unstable detection, or connector issues.
- Record the applied supply voltage, output configuration, response-time setting, and test results.
- Protect the sensing face and connector during packing.
- Use ESD-conscious handling and suitable protective packaging.
- Clearly identify the unit’s condition as tested, untested, used, or refurbished according to the actual inspection performed.
Field Engineer’s Pitfall Guide
❗ Do not confuse LR- with LR-W500
The LR- uses a 4-pin M12 connector, while the LR-W500 is the 2 m cable version. They share the 30–500 mm detection range, but the connection arrangement is different. Confirm the installed cable and connector before ordering.
❗ NPN/PNP selection must match the PLC input
The LR- supports selectable NPN and PNP open-collector output. A mismatch between sensor output configuration and PLC input wiring can result in a sensor that powers up but does not register correctly in the control system. Verify the wiring diagram and input type before commissioning.
❗ Do not treat the 500 mm rating as a guaranteed detection distance for every target
The published 30–500 mm range is a model specification, not a guarantee of identical performance on every material or surface. Validate detection reliability using the actual target, installation angle, spot size, and operating environment.
Intent-Driven FAQ
What is the KEYENCE LR- used for?
The LR- is a full-spectrum photoelectric sensor used for non-contact object detection in industrial automation systems.
What is the detection range of the LR-?
KEYENCE specifies a detection range of 30 to 500 mm. Actual application performance should be verified using the intended target and mounting conditions.
Does the LR- use an M12 connector?
Yes. The LR- is the 4-pin M12 connector version. The LR-W500 is the corresponding cable-type model.
Does the LR- support IO-Link?
Yes. KEYENCE specifies IO-Link Version 1.1, COM2, at 38.4 kbps. Confirm the IO-Link master and parameter configuration for the intended installation.
Is the LR- compatible with NPN and PNP PLC inputs?
The sensor supports selectable NPN or PNP open-collector output. Compatibility depends on the selected output configuration, PLC input type, and correct wiring.
Can the LR- replace an LR-?
Not as a direct cable-for-cable replacement without checking the connection arrangement. The LR- uses an M12 connector, while the LR- has a 2 m cable. Confirm the required connector, cable, wiring, and mounting arrangement before substitution.
What should buyers verify before purchasing a used LR-?
Confirm the complete model number, connector condition, sensing-face condition, output operation, and included accessories. For production use, request evidence of functional testing and verify the sensor against the machine’s wiring and detection requirements.
Bottom Line for Buyers
The KEYENCE LR- is a 30–500 mm full-spectrum photoelectric sensor with a 4-pin M12 connector, selectable NPN/PNP output, white LED sensing, and IO-Link capability.
For replacement procurement, verify the exact model, connector arrangement, PLC input compatibility, and detection performance on the actual target. A matching model number is the starting point; a verified electrical and application fit is what makes the spare usable.
