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3U OpenVPX High Density Multifunction I/O Board

The 68CB6 is a Configurable Open Systems Architecture™ (COSA®) 3U OpenVPX™ board that is preconfigured with 10 different “inboard” I/O, measurement and communication functions. This Combination-function Board (CB) provides a full suite of some of the most common & useful function interfaces supporting many different applications. The 68CB6 features a wide but dedicated selection of functions: Standard Functionality Discrete I/O (DT1); Successive Approximation Register (SAR) ±100 V Analog-to-Digital (AD); High Voltage Analog-to-Digital (ADF); ±10 V Digital-to-Analog (DA); Thermocouple (TC1) or Resistance Temperature Detector (RT1); Full-bridge Strain Gauge (SG1); Transmission/gear box Chip Detection and Fuzz Burn (CD1);  LVDT-to-Digital linear (LD6) displacement (position) measurement, AC Reference Source output (AC2); CAN bus communication (CB8). The 68CB6 offers unparalleled programming flexibility, a wide range of operating characteristics, and a unique design that eliminates the need for external intermediate circuit considerations such as pull-up resistors or mechanical configuration jumpers. Inboard functions are software controlled and memory addressed, accessed in similar COSA® modular fashion to maintain seamless common NAI Software Support Kit & API/library structures.

  • 3U OpenVPX Profiles MOD3-PER-1U-16.3.3-2, SLT3-PER-1U-14.3.3
  • 12 channels of Standard Functionality (SF) Discrete I/O functions
  • 16 channels of independent 16-bit Successive Approximation Register (SAR) ±100 V Analog-to-Digital (A/D)
  • 2 channels of isolated High Voltage Analog-to-Digital (A/D) input functions
  • 2 channels of ±10 V Digital-to-Analog (D/A) Output functions
  • 8 channels of Thermocouple (TC) or Resistance Temperature Detector (RTD) measurement interface
  • 5 channels of full-bridge Strain Gauge (SG) measurement
  • 4 channels of transmission/gear box Chip Detection (CD) as well as a Fuzz Burn (FB) circuit interface
  • 2 channels of LVDT-to-Digital linear displacement (position) measurement, including
  • 2 channels of AC Reference Source output
  • 2 channels of CANbus communication with Flexible Data (FD) rate.

68CB6 In Board Functions
Function Inboard
Channels Input Scaling Resolution Accuracy (±) Sampling Rate (max.) Type
A/D Converter ADF 16 ±100, 50, 25,
12.5 or 6.25 VDC
16-Bit 0.1% FSR 200 kSPS SAR
CF1 (A/D High-V) 2 ±240 VDC 24-bit 100mV 8 kHz Sigma-Delta
Function Inboard
Channels Output Range Resolution Accuracy (±) Settling Time Current Output (max.)
D/A Converter CF1 (DA1) 2 ±5, ±10, 0-5, or 0-10 VDC 16-Bit 0.05% FSR 10 µs typical ±25 mA
Function Inboard
Channels Input Range Output Range Programmable Current Out (max.) Comments
I/O, Discrete CF1 (DT1) 12 0-60 VDC N/A Input only N/A Contact or Voltage Sense
Function Inboard
Channels Voltage Output Frequency Range Accuracy (±) Output Drive Regulation
AC Ref (for LVDT) (LD6) 2 1-5 kHz 2-12 Vrms ±1.5% of setting
< 15 kHz; ±3% of setting ≥ 15 kHz
50 mA (max) ±1.5% No Load to Full Load (using sense lines)
Simulation and Measurement
Function Inboard Module-type Channels Input A/D R Accuracy Input A/D R Range Programmable Charge: FB Discharge Inhibit:
Chip Detect / Fuzz Burn (measurement) CD2 4 ±5% FS, repeatable 0 to 100k ohms 0.25 – 2.25 Joules (±10% of setting) Discharge inhibited if measured R ≥ 2kΩ
Function Inboard
Channels Frequency Resolution Accuracy (±) Interface
LD6 2 47 Hz to 20 kHz 16-Bit 0.025% FSR 2, 3 or 4-wire programmable
Function Inboard
Channels A/D Converter Accuracy (±) Output Current (Maximum): Output Data Rate
Strain Gauge
SG2 5 32-bit Delta-Sigma ± 0.1% Full-Scale (FS) range 100 mA / source 2.5 to 38,400 Hz
Function Inboard
Channels Sample Rate Resolution Accuracy (±) Interface Comments
Thermocouple / RTD (measurement) TR1 8 3 – 4800 Hz 24-Bit 0.2-0.9° C (typ.)
0.2% FSR
J, K, T, E, N, B, R, S
Raw A/D input
TC type dependent
±100 mV
Function Module Channels CAN Protocol Message Buffer Data Rate (Prog.) Comments
CAN Bus CF1 (CB8) 2 CAN FD 16K Rx/Tx 1 Mbps (max.) Flexible Data Rate
Block Diagram
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6/30/2022 5:16:40 AM
6/30/2022 5:17:23 AM

The 68CB6 includes SSKs to support multiple operating systems. In addition, SSKs are supplied with source code and board-specific library I/O APIs to facilitate system integration.

Accelerate Your Time-to-Mission™ With COSA®

NAI’s Configurable Open Systems Architecture™ (COSA®) offers a choice of over 70 smart I/O, communication, and Ethernet switch functions, providing the highest package density and greatest flexibility of any multifunction I/O board in the industry. Preexisting, fully-tested functions can be combined quickly and easily in an unlimited number of ways. Choose the ideal platform for your application below. Each I/O function has dedicated processing, unburdening the system Single Board Computer (SBC) from unnecessary data management overhead.

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