Keyence LR-W70C White LED Color Sensor

Keyence LR-W70C Dual-Spot Color Sensor with M12 Connector

Product Introduction

The LR-W70C belongs to the Keyence LR-W series of self-contained full-spectrum color sensors. This model uses a white LED light source with a small, dual-spot design. Moreover, it features an M12 connector 4-pin type interface, which allows quick replacement without rewiring.

Production teams often need compact sensors for small-part color inspection. Specifically, the LR-W70C covers a detecting distance of 30 to 70 mm. Its minimum spot diameter measures approximately 1.6 x 2.9 mm at 50 mm. As a result, it detects tiny marks, labels, and color differences on crowded lines. Besides, the dual-spot function supports difference and 2-point matching modes.

Technical Specifications

The LR-W70C operates on a supply voltage of 10 to 30 VDC, including 10% ripple (P-P). It also requires a Class 2 or LPS power source. Current consumption stays at 60 mA or less at 24 VDC, and 110 mA or less at 12 VDC, with no load.

Output options include NPN open collector or PNP open collector, which users can select. Meanwhile, the output handles 30 VDC or less, 50 mA or less, and residual voltage of 2 V or less. N.O. and N.C. modes are also selectable. For external input, tuning and transmission OFF are available.

Communication support covers IO-Link v1.1 and COM2 at 38.4 kbps on connector-type models. However, this unit has no built-in ports beyond that. In addition, communication expansion is not available.

Response Time and Detection Modes

Response time depends on the selected detection mode. For 1-spot mode, users can choose 200 µs, 1 ms, 10 ms, 100 ms, or 500 ms. Furthermore, 2-spot difference mode offers 500 µs, 2.5 ms, 20 ms, 200 ms, or 999 ms. Meanwhile, 2-spot 2-point matching provides 400 µs, 2 ms, 20 ms, 200 ms, or 999 ms.

The built-in timer supports OFF, ON-delay, OFF-delay, and one-shot modes. Therefore, engineers can fine-tune output timing for sorting, sealing, or rejection tasks.

Mechanical and Environmental Parameters

The LR-W70C weighs approximately 75 g, making it lighter than cable-type models. Its protection rating reaches IP65 and IP67 under IEC60529. This means it resists dust and water jets in demanding factory settings.

Operating temperature spans -20 to +50 °C with no freezing. Relative humidity should stay between 35 and 85 % RH with no condensation. These ratings suit most indoor industrial environments.

Installation Guide

First, mount the sensor near the target using its compact housing. Next, connect the M12 4-pin cable to the supply within the 10 to 30 VDC range. Then, select NPN or PNP output to match the controller. After that, choose the detection mode and response time for the application.

For dual-spot work, align both spots on the reference and target areas. Besides, keep the lens clean to avoid false readings. Finally, verify the output with a test sample before full production.

Packaging List

• 1x Keyence LR-W70C color sensor

• 1x M12 connector 4-pin mating cable

• 1x Mounting bracket and screws

• 1x Quick setup guide

FAQ

Q1: What is the detecting distance of the LR-W70C?
A: The LR-W70C detects from 30 to 70 mm, with a spot size of about 1.6 x 2.9 mm at 50 mm.

Q2: Which detection modes does this sensor offer?
A: It supports 1-spot, 2-spot difference, and 2-spot 2-point matching modes.

Q3: Does the LR-W70C offer IO-Link communication?
A: Yes, it supports IO-Link v1.1 and COM2 at 38.4 kbps on connector-type models.

Q4: What is the response time range?
A: It depends on the mode, ranging from 200 µs in 1-spot mode to 999 ms in dual-spot modes.

Q5: How is the LR-W70C shipped?
A: We ship via Fedex, UPS, and DHL for fast global delivery.