Keyence LR-ZB250CN CMOS Laser Sensor NPN Output

Keyence LR-ZB250CN CMOS Laser Sensor for Short-Range Detection

Product Introduction

The LR-ZB250CN is a self-contained CMOS laser photoelectric sensor from the Keyence LR-Z series. This rectangular unit uses U.C.D. distance and contrast detection for stable sensing. Moreover, it covers a detecting distance of 35 to 250 mm. The compact body fits tight mounting spaces on automated equipment.

A red laser with a 660 nm wavelength serves as the light source. Specifically, this model holds a Class 1 rating under IEC60825-1 and FDA CDRH Part1040.10. Therefore, it needs fewer safety controls than Class 2 devices. The spot diameter measures approximately 2.4 x 1.2 mm at 250 mm, which supports small-target detection.

The LR-ZB250CN delivers an NPN open collector output. Users may select Light-ON or Dark-ON operation to match controller logic. Meanwhile, the M8 4-pin connector speeds up wiring and replacement. On CB/C3P connector-type models, IO-Link v1.1 and COM2 at 38.4 kbps are also available.

Technical Specifications

The detecting distance spans 35 to 250 mm for flexible mounting. Standard detectable deviation measures 9 mm from 35 to 180 mm. Furthermore, it reaches 25 mm from 180 to 250 mm. Display resolution ranges from 1 to 3, matching 1 to 3 mm settings.

Response time offers three selectable values: 1.5 ms, 10 ms, and 50 ms. Besides, a built-in timer provides OFF, ON-delay, OFF-delay, and one-shot modes. The supply voltage accepts 10 to 30 VDC with 10% ripple (P-P), using Class 2 or LPS sources. Power consumption stays at 450 mW or less, drawing 18 mA or less at 24 V and 34 mA or less at 12 V.

The output uses an NPN open collector design. Its applied voltage reaches 30 VDC or less, with control current at 100 mA or less. Residual voltage remains 1.2 V or less at 10 mA or less. Therefore, the sensor pairs well with common PLC input modules.

Mechanical and Environmental Parameters

The rectangular housing suits narrow installation areas. Although exact dimensions are not available, the connector type weighs approximately 55 g. The M8 4-pin connection keeps cable routing clean. Additionally, the protection rating includes IP68 (IEC60529), IP69K (DIN40050-9), and NEMA 4X / 6P / 13.

Operating temperature ranges from -10 to +50 °C without freezing. Storage temperature spans -25 to +75 °C, also without freezing. Relative humidity stays between 35 and 85 % RH with no condensation. Consequently, the sensor handles washdown and dusty environments with ease.

Installation Guide

First, mount the LR-ZB250CN on a rigid bracket to prevent vibration errors. Next, align the laser spot with the target at the required distance. Then, connect the M8 4-pin cable between the sensor and the controller. After that, set the response time and timer mode through the display.

Operators should confirm the Light-ON or Dark-ON setting before startup. Also, clean the lens regularly to preserve detection accuracy. For IO-Link models, configure COM2 parameters through the master device. Finally, verify the output signal with a multimeter or PLC monitor.

Packaging List

• 1 x Keyence LR-ZB250CN CMOS laser sensor

• 1 x M8 4-pin connector cable (as ordered)

• 1 x Mounting bracket

• 1 x Quick reference guide

Shipping
Fedex, UPS, DHL

FAQ

1. What is the detecting range of the LR-ZB250CN?
   The sensor covers 35 to 250 mm with range-dependent deviation values.

2. Which laser class does this model use?
   It uses a Class 1 red laser at 660 nm under IEC60825-1.

3. What output type does the LR-ZB250CN provide?
   It offers an NPN open collector output with Light-ON and Dark-ON selection.

4. Does this sensor support IO-Link communication?
   Yes, IO-Link v1.1 and COM2 at 38.4 kbps work on CB/C3P connector-type models.

5. What response time options are available?
   Users can select 1.5 ms, 10 ms, or 50 ms based on application needs.