Overview
The Keyence PZ2-51R is a built-in amplifier photoelectric receiver module in Keyence’s PZ2 series. This 12-24VDC sensor operates as the receiver component in a thru-beam photoelectric pair and delivers reliable object detection for industrial automation, packaging, material handling, and assembly line applications. The compact design with integral amplification eliminates the need for external signal conditioning while maintaining high detection accuracy.
Key Features
- Built-in amplifier eliminates external conditioning components
- 7-meter detection distance for thru-beam applications
- NPN transistor output for direct PLC/controller interfacing
- 1-turn trimmer potentiometer for sensitivity adjustment
- Fast 1.5ms maximum response time
- IP67 environmental rating for washdown and dusty environments
- Square transmissive cable connector for quick coupling/decoupling
Technical Specifications
- Supply Voltage: 12-24 VDC
- Current Consumption: 25 mA maximum (receiver)
- Output Type: NPN transistor
- Detection Distance: 7 meters
- Response Time: 1.5 ms maximum
- Sensitivity Adjustment: 1-turn trimmer potentiometer
- Cable Type: Square transmissive (connector type)
- IP Rating: IP67
- Series: PZ2 (thru-beam photoelectric pair)
- Manufacturer: Keyence Corporation
Typical Applications
- Packaging line presence/absence detection
- Conveyor belt object counting and position verification
- Material handling systems and sorting applications
- Assembly line workpiece positioning
- Washdown environments requiring IP67 protection
- High-speed production systems requiring fast response time
Compatibility & Replacements
Compatible With
- Keyence PZ2-51P photoelectric transmitter (forms complete thru-beam pair)
- PLC analog and digital input modules accepting NPN sensor signals
- Industrial control systems with 12-24 VDC supply
- Devices accepting standard NPN transistor output
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering—the PZ2-51R is a specific receiver model designed to pair with the PZ2-51P transmitter.
Works With
- Any PLC or industrial control module with NPN input capability
- Analog and digital input cards from major automation vendors
- Industrial networks accepting discrete sensor inputs
- Thru-beam photoelectric sensing configurations



