Keyence PZ-G61EN Photoelectric Sensor NPN

Product Introduction

The Keyence PZ-G61EN is a built-in amplifier photoelectric sensor from the PZ-G series. Keyence engineered this rectangular retro-reflective model for long-range detection with the P.R.O. function. Specifically, it reaches 0.1 to 4.2 m when paired with the R-2L reflector. Therefore, it handles pallet detection, conveyor zone control, and wide-area presence checks.

Additionally, the PZ-G61EN provides a 500 µs maximum response time and a 1-turn trimmer for sensitivity adjustment. Users select LIGHT-ON or DARK-ON operation with a switch. The NPN open collector output supports up to 30 V and 100 mA. Meanwhile, the glass-fiber reinforced PBT housing and polyarylate lens cover resist industrial wear. Finally, the M12 pigtail connector speeds up replacement, and the IP67/IP69K rating supports washdown environments.

Technical Specifications

Detection Performance

The PZ-G61EN uses a red LED light source and works as a retro-reflective, long-range sensor with the P.R.O. function. Its detecting distance spans 0.1 to 4.2 m when the R-2L reflector is used. The P.R.O. function cuts false detection from shiny or transparent targets. Moreover, the 500 µs maximum response time keeps pace with fast conveyor lines.

Electrical Characteristics

The sensor accepts a supply voltage of 10 to 30 VDC nominal, including ripple (P-P) 10%. Current consumption stays at 34 mA or less. The PZ-G61EN delivers an NPN open collector output rated at 30 V maximum and 100 mA maximum. Residual voltage remains at 1 V maximum. Besides, built-in protection circuits cover reversed polarity, overcurrent, and surge absorption. Interference suppression supports up to 2 units through polarization filters or the automatic different frequency function.

Connection and Indicators

An M12 pigtail connector replaces the fixed cable on this model. A 1-turn trimmer with 230° rotation allows sensitivity adjustment. The operation mode switch selects LIGHT-ON or DARK-ON. An orange LED indicates output status, while a green LED shows stable operation. These indicators help technicians confirm reflector alignment during setup.

Mechanical and Environmental Parameters

Housing and Mounting

The housing uses glass-fiber reinforced PBT, and the lens cover is polyarylate (PAR). The rectangular shape simplifies mounting on brackets and fixtures. Mounting torque must not exceed 0.5 N·m at the mounting hole part. This M12 pigtail model weighs approximately 30 g. PZ-G61EN dimensions (H×W×D) are not available in the source data. Please confirm the drawing with our sales team before final design work.

Environmental Ratings

The operating temperature range runs from -20 to +55 °C with no freezing. Relative humidity must stay between 35 and 85 % RH with no condensation. The protection rating covers IEC IP67, NEMA 4A, 6, 12, and DIN IP69K. Ambient light resistance reaches 5,000 lux maximum for incandescent lamps and 20,000 lux maximum for sunlight. Furthermore, vibration resistance covers 10 to 55 Hz with 1.5 mm double amplitude for 2 hours in each X, Y, Z direction. Shock resistance reaches 1,000 m/s², 6 times in each X, Y, Z direction.

Installation Guide

First, mount the R-2L reflector opposite the sensor and align both units on the same axis. Confirm the supply voltage and wiring polarity before powering the sensor. Next, connect the M12 pigtail to the matching extension cable and tighten the coupling nut by hand.

Then, set the operation mode switch to LIGHT-ON or DARK-ON as your control logic requires. Rotate the 1-turn trimmer until the orange output LED responds reliably at the target distance. Meanwhile, watch the green stable operation LED to confirm margin. Finally, test the sensor across the full 0.1 to 4.2 m range and at production speed. For multi-unit installations, use the polarization filter option or the automatic different frequency function to limit interference to 2 units.

Packaging List

• 1 × Keyence PZ-G61EN photoelectric sensor

• 1 × Mounting bracket set (as supplied)

• 1 × Installation and operation manual

• 1 × Protective carton packaging

Shipping: Fedex, UPS, DHL.

FAQ

Q1: What is the detecting range of the PZ-G61EN?
A: The sensor reaches 0.1 to 4.2 m when paired with the R-2L reflector. Range depends on the reflector size and alignment.

Q2: Does the PZ-G61EN use a cable or a connector?
A: This model uses an M12 pigtail connector instead of a fixed cable. You need a matching M12 extension cable to complete wiring.

Q3: What output type does this sensor provide?
A: It provides an NPN open collector output rated at 30 V and 100 mA maximum. Residual voltage is 1 V maximum.

Q4: What is the P.R.O. function on this sensor?
A: The P.R.O. function improves detection stability for shiny or transparent targets. It helps cut false triggering in retro-reflective setups.

Q5: Can I use the PZ-G61EN in washdown areas?
A: The sensor carries IP67, NEMA 4A/6/12, and DIN IP69K ratings. It suits washdown and dusty areas when mounted correctly.