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IO116: 16-bit Analog module with Current Loop Inputs and Outputs

16-bit analog module with 8 current loop inputs, 4 current loop outputs, and Simulink driver blocks

The IO116 provides both voltage and current analog input/output capability in a single industry-standard module. Analog inputs can be configured either as eight differential voltage inputs, 16 single-ended voltage inputs, or as current-loop terminations. Four analog output channels provide both voltage and current loop outputs. A 16-bit bidirectional digital port is provided consisting of 16 TTL lines that can be configured as inputs or outputs in groups of eight lines.

Analog inputs are configurable as voltage inputs with unipolar ranges of +10V, +5V or +2.5V, or as current-loop terminators with standard 0-20mA or 4-20mA ranges. A single 16-bit A/D converter scans all analog inputs through a high-speed buffered analog multiplexer. Low-resistance switches connect current-loop terminators across the analog inputs under software control. The input channels can be configured to be all voltage or all current-loop, or half voltage and half current-loop.


  • 4 current-loop output channels
  • 8 scanned analog input channels
  • 16-bit resolution
  • Current-loop outputs have -15 to +11V compliance using internal supplies, or Zero to +31V compliance using an external +34V loop supply
  • 16-bit bi-directional TTL digital port
Form factor PMC
PCI bus 32-bit, 33MHz
Power requirements 3W typical, 4W maximum
EMI EMI shield on component side
Connector 68-Pin SCSI3
Cable connectors: Tyco Electronics
Board connector: Tyco Electronics part no. 5749069-7
Operating temperature 0 to 70°C (extended temperature option: -40°C to +80°C)
Relative humidity 0 to 95%, non-condensing
Analog inputs (at 25°C)  
Configuration 16 input lines, configurable as 16 single-ended or 8 differential voltage channels, or as current-loop termination channels
Software configurable as (a) all voltage, (b) all current-loop, or as (c) four voltage and four current-loop
Resolution 16 bits (0.0015 percent of FSR)
Input Ranges 0 to +10, +5 or +2.5 Volts in voltage mode, or as 0-20mA or 4-20mA in current-loop mode (software configurable)
Input impedance Voltage Mode:
1.0 Megohms line-to-ground, 2.0 Megohms line-to-line, in parallel with 100pfd. Independent of scan rate
Current Mode:
250 Ohms ±0.15% (500 Ohms with 500-Ohm option)
Bias current 80nA maximum
Signal to Noise (SNR) 80dB typical
Common Mode Rejection 60dB typical, DC-60 Hz, differential input mode
Common Mode Range ±12V in differential or current-loop configuration with shorted inputs
Maximum Input Voltage ±12V on either HI or LO input line for specified performance, for both voltage and current-loop modes
Input protection Any input line:
  ±30V with power applied, ±15V with power removed
  Voltage Mode: Same as indicated for "Any input line"
  Current Mode: ±10V for 250 Ohm inputs; ±14V for 500 Ohm inputs
DC accuracy
(max. composite error referred to inputs)
Voltage inputs:
  0-10V range: ±3.2mV (zero scale), ±4.5mV (fullscale)
  0-5V range: ±2.3mV (zero scale), ±3.0mV (fullscale)
  0-2.5V range: ±1.6mV (zero scale), ±2.4mV (fullscale)
Current inputs: (250 Ohm terminators, using the 0 to +5V input range)
  0-20mA range: ±15µA (zero scale), ±50µA (fullscale)
  4-20mA range: ±22µA (zero scale), ±50µA (fullscale)
Crosstalk Rejection 85dB, DC-10kHz
Integral nonlinearity ±0.003 percent of FSR (fullscale range)
Differential nonlinearity ±0.0015 percent of FSR (fullscale range)
Analog outputs (at 25°C)  
Configuration 4 single-ended voltage-output DACs driving 4 current-loop output channels
Resolution 16 bits (0.0015 percent of FSR)
Output range Voltage outputs: Same as selected for the input channels
Current outputs: 0-20mA or 4-20mA (requires 0 to +5V voltage range)
Output resistance Voltage outputs: 1.0 Ohm maximum
Current outputs: 30 Megohms minimum.
Load current
(voltage outputs)
Zero to ±3mA per individual channel
Output protection Voltage outputs withstand sustained short-circuiting to ground
Settling time
(voltage outputs)
8µs typically to 0.01% of halfscale step
Slew rate
(current outputs)
1.5mA per µs typically
Noise 1.0mV-RMS, 10Hz-1MHz typical (voltage outputs)
Digital I/O  
Configuration 16 bidirectional data lines, one auxiliary input line, and one auxiliary output line
Compatibility CMOS / TLL
MTBF (Mean Time Between Failure) - MTBF values shown are based on calculation according to MIL-HDBK-217F and MIL-HDBK-217F Notice 2; Environment: GB 20°C. The MTBF calculation is based on component FIT rates provided by the component suppliers. If FIT rates are not available, MIL-HDBK-217F and MIL-HDBK-217F Notice 2 formulas are used for the FIT rate calculation.
Item ID Product Name Components
20116X IO116
  • 1 x IO116
  • 1 x shielded round 68-pin SCSI3 to 68-pin male MDR cable, 1.82m (6ft) long
  • 1 x 68-pin spring-loaded terminal board with DIN-rail mount
  • Driver block library for Simulink Real-Time™
  • Installation into real-time target machine
201169X IO116-ExtTemp
  • 1 x IO116-ExtTemp with extended temperature range from -40ºC to +80ºC
  • 1 x shielded round 68-pin SCSI3 to 68-pin male MDR cable, 1.82m (6ft) long
  • 1 x 68-pin spring-loaded terminal board with DIN-rail mount
  • Driver block library for Simulink Real-Time™
  • Installation into real-time target machine

Key to X in Item ID
Please replace the X with the code number of the specific target machine into which this I/O module shall be installed:

  • 5 = Mobile real-time target machine
  • 6 = Performance real-time target machine
  • 8 = Baseline real-time target machine

Pricing information
We don't publish pricing information on our website. Upon request by e-mail or phone we can provide a complete price list covering our entire product portfolio in various currencies. We recommend that you get in touch with us to discuss your specific needs. We can then quickly provide you with a tailored quotation including technical and pricing information.


Included in the Delivery

  • I/O module installed into real-time target machine
  • Cable
  • Terminal board
  • Simulink driver blocks
  • Test models
  • Comprehensive documentation


Supported target machines


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