Keyence PZ-G51EN Thrubeam Sensor | PZ-G Series

Keyence PZ-G51EN Thrubeam Photoelectric Sensor

Product Introduction

The PZ-G51EN belongs to the Keyence PZ-G series of built-in amplifier photoelectric sensors. This model uses a thrubeam sensing method, which delivers reliable detection over long distances. Specifically, it reaches a maximum detecting distance of 20 m. The red LED light source makes alignment easy during setup. Meanwhile, the NPN open collector output supports stable signal transmission to PLCs and controllers. As a result, the PZ-G51EN suits many factory automation tasks, such as object counting, position detection, and safety gates.

Technical Specifications

The PZ-G51EN provides a 20 m maximum detecting distance (65.6 ft). Its light source is a red LED. Sensitivity adjustment uses a 1-turn trimmer with a 230° range. Additionally, the response time is 500 µs maximum, which supports fast moving targets. The operation mode is LIGHT-ON/DARK-ON and remains switch-selectable. For status monitoring, the sensor includes four LEDs. The power indicator (T) is orange, and the output indicator (R) is orange. Furthermore, the stable operation LED is green, while the light receiving LED is red.

Electrical Parameters

The supply voltage ranges from 10 to 30 VDC nominal, including ripple (P-P) 10%. Current consumption stays low: the transmitter uses 20 mA or less, and the receiver uses 28 mA or less. The output type is NPN open collector. Control output handles 30 V maximum and 100 mA maximum. Residual voltage is 1 V maximum. Besides, the cable connection uses an M12 pigtail connector. Protection circuits include reversed polarity, overcurrent protection, and a surge absorber. For interference suppression, the sensor supports up to 2 units through polarization filters or automatic different frequency function.

Mechanical and Environmental Parameters

The housing material is glass-fiber reinforced PBT, which offers strong durability. The lens cover uses polyarylate (PAR). The PZ-G51EN weighs approximately 30 g for the rectangular M12 pigtail model. Its protection rating meets IEC IP67, NEMA 4A, 6, 12, and DIN IP69K. Therefore, it withstands dust and water exposure in harsh areas. The operating temperature range is -20 to +55 °C with no freezing. Relative humidity stays between 35 and 85 % RH with no condensation.

Ambient light resistance reaches 5,000 lux maximum for incandescent lamps and 20,000 lux maximum for sunlight. Vibration resistance covers 10 to 55 Hz with 1.5 mm double amplitude for 2 hours in each X, Y, Z direction. Shock resistance is 1,000 m/s², tested 6 times in each X, Y, Z direction. These ratings ensure stable performance in demanding industrial environments.

Installation Guide

First, mount the transmitter and receiver on a firm bracket. Use the mounting hole part and tighten to 0.5 N·m maximum. Next, connect the M12 pigtail connector to the power supply and load. Then, set the operation mode to LIGHT-ON or DARK-ON based on your application. After that, adjust the 1-turn trimmer until the stable operation LED turns green. Finally, verify alignment by checking the light receiving LED. If interference occurs, change the frequency setting or add polarization filters.

Packaging List

• 1 × Keyence PZ-G51EN Thrubeam Photoelectric Sensor (Transmitter and Receiver)

• 1 × M12 Pigtail Connector Cable

• 1 × Mounting Bracket and Screw Set

• 1 × Original Keyence Packaging Box

• 1 × Quick Reference Sheet

Shipping Methods: Fedex, UPS, DHL.

FAQ

Q1: What is the maximum detecting distance of the PZ-G51EN?
A: The PZ-G51EN offers a maximum detecting distance of 20 m (65.6 ft). This makes it suitable for long-range thrubeam detection.

Q2: Does this sensor support both LIGHT-ON and DARK-ON modes?
A: Yes. The operation mode is switch-selectable between LIGHT-ON and DARK-ON. You can change it based on your control logic.

Q3: What output type does the PZ-G51EN provide?
A: It provides an NPN open collector output. The maximum load is 30 V and 100 mA, with residual voltage of 1 V maximum.

Q4: How do I adjust sensitivity on this Keyence sensor?
A: Use the 1-turn trimmer with a 230° range. Turn it slowly while watching the stable operation LED for the best setting.

Q5: What is the protection rating of the PZ-G51EN?
A: The sensor meets IEC IP67, NEMA 4A, 6, 12, and DIN IP69K. Therefore, it resists dust and water in tough environments.