Keyence LR-ZB240CB CMOS Laser Sensor

Keyence LR-ZB240CB CMOS Laser Sensor for Distance and Contrast Detection

The Keyence LR-ZB240CB is a self-contained CMOS laser photoelectric sensor from the LR-Z series. It uses U.C.D. (distance/contrast detection) technology, so it handles both presence checks and difference detection. Because the housing uses an M18 threaded mount, installation into standard brackets takes little time. Meanwhile, the M12 4-pin connector keeps wiring clean and serviceable. This combination suits automotive, food, and packaging equipment.

Technical Specifications of the LR-ZB240CB

The LR-ZB240CB covers a detecting distance of 25 to 240 mm. Its standard detectable deviation changes with range, which engineers should note during setup. Specifically, the deviation is 9 mm from 25 to 170 mm and 25 mm from 170 to 240 mm. The display resolution spans 1 to 3 (1 to 3 mm), so fine tuning stays simple. Furthermore, the spot diameter is approximately 2.4 x 1.2 mm at 240 mm, which supports small target detection.

A red laser at 660 nm provides the light source. The laser class is Class 1 under IEC60825-1 and FDA CDRH Part1040.10. Additionally, the response time is selectable at 1.5 ms, 10 ms, or 50 ms. The timer offers OFF, ON-delay, OFF-delay, and one-shot modes. For communication, IO-Link v1.1 at COM2 (38.4 kbps) is available on CB/C3P connector-type models. However, no built-in ports or expansion ports exist beyond that.

Electrical and Output Details

The supply voltage ranges from 10 to 30 VDC with 10% ripple (P-P), Class 2 or LPS. Power consumption stays at 450 mW or less, which equals 18 mA or less at 24 V and 34 mA or less at 12 V. The output type is NPN+PNP open collector. It handles an applied voltage of 30 VDC or less and a control current of 100 mA or less. Besides, residual voltage stays at 1.2 V or less at 10 mA or less. Output operation supports Light-ON and Dark-ON selection.

Mechanical and Environmental Parameters

The LR-ZB240CB weighs approximately 55 g in connector type. Its protection rating reaches IP68 under IEC60529 and IP69K under DIN40050-9. Moreover, it meets NEMA 4X, 6P, and 13 standards. Therefore, high-pressure washdown and dust exposure cause no damage. Operating temperature ranges from -10 to +50 °C with no freezing. Storage temperature spans -25 to +75 °C, also with no freezing. In addition, relative humidity must remain between 35 and 85 % RH with no condensation.

Installation Guide for the LR-ZB240CB

First, mount the M18 threaded body into a rigid bracket at the target distance. Next, connect the M12 4-pin cable to the supply and output circuit. Then, select the response time that matches your line speed. After that, choose NPN or PNP wiring and Light-ON or Dark-ON logic. Finally, teach the reference distance or contrast value using the display and buttons. Keep the laser beam away from reflective surfaces, because stray light can shift readings. Additionally, confirm the supply uses a Class 2 or LPS source within 10 to 30 VDC.

Packaging List

• 1 × Keyence LR-ZB240CB laser sensor

• 1 × M18 mounting nut set

• 1 × M12 4-pin connector fitting

• 1 × Quick start sheet

Shipping

Orders ship by Fedex, UPS, or DHL. Tracking numbers go out after dispatch. Packing uses anti-static bags and foam for safe transit.

FAQ

Q1: What is the detecting distance of the Keyence LR-ZB240CB?
A: It covers 25 to 240 mm, with deviation values that change across two range zones.

Q2: Which laser class does the LR-ZB240CB use?
A: It uses a red laser at 660 nm, classified as Class 1 under IEC60825-1.

Q3: Does the LR-ZB240CB offer IO-Link?
A: Yes, IO-Link v1.1 at COM2 (38.4 kbps) is available on CB/C3P connector-type models.

Q4: What protection rating does this sensor carry?
A: It carries IP68, IP69K, and NEMA 4X / 6P / 13 ratings for harsh environments.

Q5: What output type does the LR-ZB240CB provide?
A: It provides an NPN+PNP open collector output with Light-ON and Dark-ON selection.