Pepperl+Fuchs NBB20-U1-UU

Inductive sensor

IN STOCK!!!

The Pepperl+Fuchs NBB20-U1-UU is a flexible AC/DC inductive proximity sensor designed for universal power supply applications. With a wide operating voltage range of 20...253 V AC and 20...300 V DC, this sensor is the perfect "all-in-one" solution for maintenance and retrofitting in facilities with mixed power standards.

Featuring a 20 mm flush sensing range and a durable VariKont® housing, the NBB20-U1-UU offers a selectable output function (Normally Open or Normally Closed), configurable via simple wiring in the terminal chamber. Its rotatable sensing head allows for installation in 5 different directions without changing the mounting base.

Key Features & Advantages

• Universal Voltage (UU): Works with almost any industrial power supply, from standard 24V DC control lines to 110V/230V AC mains power.
• Selectable Logic: The output can be wired as Normally Open (NO) or Normally Closed (NC), reducing the need to stock multiple spare parts.
• Rotatable Head: The active sensing face can be rotated up, down, left, right, or front, simplifying installation in tight spaces.
• Tool-Free Maintenance: The terminal compartment allows for direct cable connection (up to 2.5 mm²) without needing soldering or special connectors.

FAQ Section

1. Q: How do I change the NBB20-U1-UU from NO to NC? A: This sensor's logic is determined by the terminal wiring. You do not need a programmer; simply bridge the terminals according to the diagram on the housing to select Normally Open or Normally Closed operation.
2. Q: Can I use this sensor with 110V AC? A: Yes, the "UU" designation means it is rated for 20...253 V AC, so it covers 24V, 110V, and 230V AC applications seamlessly.
3. Q: What is the difference between NBB20-U1-UU and NBB20-U1-E2? A: The UU model is AC/DC 2-wire, whereas the E2 model is strictly DC 3-wire (PNP). Do not interchange them without checking your PLC input type.