Keyence PZ-G51CN Photoelectric Sensor 20 m

Keyence PZ-G51CN Thrubeam Sensor NPN M8

Product Introduction

The PZ-G51CN belongs to the Keyence PZ-G series. This built-in amplifier photoelectric sensor uses a thrubeam design for stable long-distance detection. Moreover, it reaches a maximum detecting distance of 20 m. The unit runs on a red LED light source and provides an NPN open collector output. Additionally, an M8 connector simplifies wiring on busy production lines. Its rectangular housing fits standard mounting brackets with ease. Meanwhile, the IP67 and IP69K ratings resist dust, water, and washdown cleaning. As a result, the PZ-G51CN suits material handling, logistics, and packaging equipment.

Technical Specifications

The PZ-G51CN delivers a detecting distance of 20 m maximum, equal to 65.6 ft. Sensitivity adjustment uses a 1-turn trimmer with a 230° range. Besides, the response time stays at 500 µs maximum for fast triggering. Operation mode switches between LIGHT-ON and DARK-ON. Four LED indicators support setup and troubleshooting. Specifically, power shows orange, output shows orange, stable operation shows green, and light receiving shows red. The lens cover uses polyarylate for durability. Spot diameter data is not available from the supplier.

Communication and Electrical Data

For communication, the PZ-G51CN provides no built-in ports and no supported protocols. However, the M8 connector handles all wiring needs. The supply voltage ranges from 10 to 30 VDC nominal with 10% ripple. Current consumption is 20 mA or less for the transmitter and 28 mA or less for the receiver. Output type is NPN open collector with 30 V maximum and 100 mA maximum. Residual voltage stays at 1 V maximum. Furthermore, protection circuits cover reversed polarity, overcurrent, and surge absorption. Interference suppression supports up to 2 units through polarization filters or automatic frequency switching.

Mechanical and Environmental Parameters

The operating temperature range is -20 to +55 °C without freezing. Relative humidity stays between 35 and 85 % RH without condensation. Protection ratings include IEC IP67, NEMA 4A / 6 / 12, and DIN IP69K. Ambient light resistance reaches 5,000 lux for incandescent lamps and 20,000 lux for sunlight. Vibration resistance covers 10 to 55 Hz with 1.5 mm double amplitude across X, Y, and Z axes. Shock resistance reaches 1,000 m/s² six times per axis. The housing uses glass-fiber reinforced PBT. Weight is approximately 10 g for the rectangular connector model. Mounting torque must not exceed 0.5 N·m.

Installation Guide

First, mount the transmitter and receiver units facing each other. Next, align both lenses so the red beam hits the receiver center. Then, secure the brackets with a torque of 0.5 N·m or less. After that, connect the M8 plug to the supply and output lines. Furthermore, set the sensitivity using the 1-turn trimmer while watching the indicators. Finally, choose LIGHT-ON or DARK-ON mode for your logic. For crowded panels, enable the automatic frequency function to avoid crosstalk. Besides, keep the lens cover clean because dust blocks the beam. The IP69K rating permits washdown, yet the connector must remain sealed.

Packaging List

• 1 x Keyence PZ-G51CN transmitter and receiver set

• 1 x M8 connector cable (if ordered)

• 1 x Mounting bracket set

• 1 x Instruction sheet

Shipping methods include Fedex, UPS, and DHL.

FAQ

Q1: What is the detecting distance of the PZ-G51CN?
A: The PZ-G51CN reaches 20 m maximum, which equals 65.6 ft. This suits long conveyor and gate applications.

Q2: What output type does this sensor use?
A: It uses an NPN open collector output. Maximum voltage is 30 V, and maximum current is 100 mA.

Q3: How fast is the response time?
A: The PZ-G51CN responds within 500 µs maximum, so it handles fast-moving objects with ease.

Q4: Can I use the PZ-G51CN in a washdown area?
A: Yes. It carries IEC IP67, NEMA 4A / 6 / 12, and DIN IP69K ratings for harsh environments.

Q5: How many units can run side by side without interference?
A: Up to 2 units can operate together using polarization filters or the automatic different frequency function.