Product Description

The Keyence PZ-51LT is a high-performance photoelectric transmitter designed for use in conjunction with compatible receivers in industrial automation applications. As part of the PZ series, it operates on the principle of through-beam sensing, utilizing an infrared LED light source to detect objects within a specified range. This transmitter is engineered for precise and reliable detection, offering features such as adjustable sensitivity, selectable operation modes, and robust environmental resistance. Its compact design and built-in amplifier facilitate easy integration into various systems, making it suitable for applications requiring accurate object detection over a distance.​

Technical Specifications

• Feature Specification
• Model PZ-51LT
• Type Thrubeam model, L model
• Light Source Infrared LED
• Detecting Distance 7 meters
• Detectable Object Opaque material with an area of 8 mm² or more
• Sensitivity Adjustment 1-turn trimmer (240°)
• Response Time 1.5 ms max.
• Operation Mode LIGHT-ON/DARK-ON (switch-selectable)
• Indicator Lamp Output and power: red LED; stable operation: green LED
• Control Output Maximum NPN open-collector output: 100 mA or less (40 V or less)
• Stability Output Maximum NPN open-collector output: 50 mA or less (40 V or less)
• Protection Circuit Reversed polarity, overcurrent protection, surge absorber
• Power Supply Voltage 12 to 24 VDC ±10 %, Ripple (P-P) 10 % or less
• Current Consumption Transmitter: 20 mA or less, Receiver: 25 mA or less
• Enclosure Rating IP67
• Ambient Light Resistance Incandescent lamp: 5,000 lux or less, Sunlight: 20,000 lux or less
• Ambient Temperature -20 to +55 °C (No freezing)
• Relative Humidity 35 to 85 % RH
• Vibration Resistance 10 to 55 Hz, Double amplitude 1.5 mm, 2 hours in each of the X, Y, and Z directions
• Case Material Fiberglass reinforced plastic
• Weight Transmitter: Approx. 60 g, Receiver: Approx. 70 g (including 2-m cable)