Chip Detector and Fuzz Burn


Chip Detector and Fuzz Burn (CD1)

Module CD1 is NAI’s latest generation Chip Detector and Fuzz Burn Module. This module is used on our rugged COTS Multifunction Embedded I/O Boards, Single Board Computers (SBCs), and Configurable Systems offered in OpenVPX, cPCI, VME, and PCI/PCIe configurations, and also for testing and non-critical embedded applications.

Our Smart Function Modules provide uniquely flexible, mix & match customization options for use with our COTS hardware. Learn More

Module CD1

The CD1 provides six Chip Detect and Fuzz Burn interface(s). A Chip Detector (CD) is a magnetic-electrical device that provides a reliable method of detecting impending failure of bearings and gears.

The CD1 is intended to be used as a maintenance time gauge or flag risk of imminent mechanical subsystem failure. As ferrous metallic particles are attracted to the sensor and begin to bridge the gap between the two contacts, the chip sensor circuit detect resistance drops.

The CD1 continuously measures the sensor gap resistance and when the sensor gap resistance falls below the programmable FAULT resistance threshold, the Fuzz Burn charge circuit is triggered (programmable, up to 10x attempts) to ‘burn-off’ normal and typical amounts of metallic sludge (fuzz).

Chip Detector

Operating Features

  • The CD1 provides enhanced and tailored operating parameters.
  • Chip Detect Programable Resistance Thresholds: Provides a universal interface to most industry chip detector sensors.
  • Controlled Charge for Fuzz Burn: Impervious to main generator power fluctuations. Once a discharge determine rate is defined for a particular sensor, a known and consistent charge can be programmed and provided for the fuzz burn (regardless of normal range main generator MIL-STD-704 power supply fluctuations).
  • Automatic Fuzz Burn System Operation: In the automatic fuzz burn mode, any sensor resistance measurement below the programmed FAULT threshold will automatically generate the programmable fuzz burn discharges. Auto fuzz burn reduces or eliminates nuisance spurious chip detect indications.
  • Full contained and Continuous Built-In-Test (CBIT), including fuzz burn discharge path.

Features Summary

  • Chip Detect (CD) Circuit
    • 6 Channels, independent, isolated CD measurement circuits 
    • Repeatable sensor resistance/gap measurement 
      • ±5% resistance tolerance
    • Three programmable sensor resistance detect thresholds
      • OPEN
      • WARN
      • FAULT
    • Open sensor connections are detected  and reported 
  • Fuzz Burn (FB) Circuit
    • Programmable FB capacitor charge
      • SEPIC converter for known and repeatable charge delivery (tolerates and ignores input voltage fluctuations)
    • Automatic FB Charge/Discharge
      • Triggers on R < FAULT
      • Programmable Fuzz Burn-off attempts (up to 10x)
        • Status capture on # of attempts
    • Software trigger (manual control)
  • Standard NAI COSA Smart Function
    • Up to 6 CD/FB channels 
  • Independent Channel Configuration 
    • Programmable for interfacing with different sensor types (parameters) 
  • Isolated Measurement Channels
    • Mitigates false trigger
  • MIL-STD-704 Power Tolerant
    • Programmable FB charge is independent of input voltage
  • Built-In-Test (BIT)


Click below for manuals and specifications:

CD1Six (6) chip detection and burn channelsN/AContact Factory at 1 (631) 567-1100

Function module(s) featured in products below:

ModelBoard TypeBoard ArchitectureFunction Module SlotsSizeEthernetMaster / SlaveOn Board ReferenceOther
75G53U cPCIARM / Xilinx® Zynq3 2 x GbBoth   
64G5VMEARM / Xilinx® Zynq6 2 x GbBoth YUser application ARM processor capability
68G53U OpenVPXDual Core ARM® Cortex® A9 @ 800 MHz3 2 x GbBoth  Slot profile: SLT3-PER-1U-14.3.3 / Module profile: MOD3-PER-1U-16.3.3-2
68G5P3U OpenVPXDual Core ARM® Cortex® A9 @ 800 MHz3 2 x GbE or Base-KXEndpoint  SLT3-PER-1U-14.3.3 / Backplane accessible: 1 x1 PCIe lane to Module-Slot-3 & 1 SATA Interface to Module-Slot-2
79G5PCIe 31/2   N/A 
ModelBoard TypeProcessorFunction Module SlotsMaximum MemoryMaximum StorageVideo OptionsEthernetAvailable O/S
75ARM13U cPCI SBCXilinx® Zynq 7015 with Dual Core ARM® Cortex® A9 @ 800 MHz3512 MB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks®, Xilinx® PetaLinux OS and DDC-I Deos™ support
68ARM13U OpenVPX SBCXlilinx® Zynq 7015 & 7016 w/Dual Core ARM® Cortex®-A9 @800MHz3512 MB DDR3 SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River®, VxWorks® and Xilinx® PetaLinux OS Support
75PPC13U cPCI SBCNXP® QorIQ® P2041 Quad-Core e500mc Processor @ 1.2 GHz28 GB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks®
75INT23U cPCI SBCDual Core Intel® i7 3517UE @ 1.5 GHz28 GB DDR3L SDRAM32 GB SATAII NAND FlashVGA, HDMI, LVDS, or DVI2 x GbCentOS, Red Hat®, Linux®, and Windows® Embedded Standard 7
64ARM16U VME SBCXilinx® Zynq Dual Core ARM® Cortex® A9 @ 800 MHz6 + AC Ref512 MB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks® and Xilinx® PetaLinux OS support
68PPC23U OpenVPX SBCNXP® QorIQ® T2080 Quad Core @1.5 GHz2 8 GB DDR3 SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks®, DDC-I Deos OS Support