Actisense QNB-1 Quick Network Block (superseded by the A2K-SBN)

The Actisense QNB-1 (Quick Network Block) is a professional NMEA 2000 network and connection splitter designed to quickly, securely, and clearly set up a marine network. The device makes it easier to connect, power, and protect multiple NMEA 2000 instruments without loose T-connectors or complex wiring.

Key Features

• 6 NMEA 2000 drop connections for instruments, ideal for areas with many devices.
  
• Backbone in/out connections compliant with NMEA 2000 barrier strip specification.
• Dual power supply with separate fuses, allowing the two halves of the network to be powered and protected independently. In case of a blown fuse, the other half remains functional — providing extra redundancy.
• LED diagnostics for:
• power status
• polarity errors
• data activity
• fuse status
• Suitable for NMEA 2000 and NMEA 0183 (as a junction box).

Application

The QNB-1 is designed to:

• Build NMEA 2000 networks faster and more neatly
• Reduce voltage drop in long networks (split power feed)
• Facilitate fuses per segment
• Combine Raymarine STNG networks with standard NMEA 2000 (without adapter cables, depending on version)

This makes the QNB-1 highly suitable for yachts, commercial vessels, and installations with many sensors around one location (e.g., helm, flybridge, engine room).