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Companion IV™ Data Acquisition System
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The Companion IV™ Data Acquisition System is specifically designed to acquire analog signal data for Cell Assistant™ for Windows (DyneSystems dynamometer test data acquisition and control software) or National Instruments LabVIEW™. Once paired with the Companion IV™, Cell Assistant or LabVIEW™ can measure most types of analog signals, including high level voltage, current, and frequency signals - plus signals from thermocouples, thermistors, RTDs, and strain-gage bridges.
I/O Options
Whether Companion II is rack-mounted or panel-mounted, several options exist for accessing its I/O. Standard thermocouple, voltage, and transducer inputs, as well as emergency stop button can be mounted on either a remote stand (shown here with throttle actuator), or on a boom swing arm. Both offer convenient access, with the boom's capacity for inputs being the larger of the two.
Without these options, normal access is either through an I/O panel mounted in the side of the panel-mount enclosure, or direct connections to the inputs on the rear of the rack-mounted Signal Conditioning Unit. Discuss your application with our Sales Representative to determine which configuration will work best for your situation.
Companion IV Offers These Advantages and More

Rear View of the rack-mounted versions of Companion IV Master (upper) and Signal Conditioning Unit (lower)
- Modular construction for easy integration into existing wiring or new construction
- “Off the Shelf” field terminations
- Factory wired and tested with pin/socket connections
- Packaged in several configurations, to integrate with your specific needs
- High quality acquisition of analog signals with true anti-aliased digital filtering for up to 120 channels
- Provides superior deterministic sampling rates and electrical isolation
Companion IV Master Control Unit

Inside view of panel-mounted version of Companion IV
The Master Control Unit (shown, upper) provides all A-D computing for the analog data collection channels of the Signal Conditioning Unit (lower), and communicates with the test cell central data-acquisition PC. The single board computer-based system uses minimal panel space of 3.5" x 14", or 3.5" of standard rack space. The Companion II also includes power supplies for control power, pressure transducer excitation and other data collection hardware.
Companion IV Signal Conditioning Unit (SCU)
The rack mounted Signal Conditioning Unit (lower unit in photo) can be customized per application because it utilizes industry standard 5B signal conditioning modules for each specific channel. The flexibility of 5B conditioners allows a variety of different types of signals to be connected. Analog inputs (in blocks of 6) are easily wired with Sub-D connectors, while thermocouples are connected with the appropriate spade quick-connects dependent on the type of thermocouple specified. Cold junction compensation is installed for each thermocouple channel. Also available in a panel mounted option - see below.
Panel Mounted Signal Conditioning Unit (SCU)
- Requires 3" x 14" of panel space for each unit
- Each Slave unit provides connection for up to 12 channels of analog data from the Device Under Test (DUT)
- Up to 10 SCUs can be panel-mounted for each Master unit, equating to 120 possible channels of DUT data
Rack Mounted SCU

Optional boom arm enables convenient access to Companion IV's I/O
- Requires only 3.5" of standard 19" rack space for each unit
- Each SCU provides connection for up to 24 channels of analog data from the Device Under Test
- Up to 5 SCUs can be rack-mounted for each Master unit, equating to 120 possible channels of DUT data
Specifications
| Maximum Analog Inputs | 120 |
|---|---|
| Panel-mounted Assembly | 12 inputs per assembly (max. 10 units per system) |
| Analog Input Channel Accuracy | ±0.1% of full scale typical (thermocouple accuracy varies by type and range) |
| Analog Input Channel Resolution | 16 bit |
| Maximum Alias Error | 3.9 bits (-73dB) @ 11.5 Hz |
| Isolation | 1,500 volts RMS (typical) |
| Analog Input Signal Types | Consult with Sales Representative |
| Maximum Analog Outputs | 8 |
|---|---|
| Analog Output Channel Accuracy | ±0.1% of full scale typical |
| Analog Output Channel Resolution | 12 bit |
| Isolation | 1,500 Volts RMS (typical) |
| Analog Signal Output Types | Consult with Sales Representative |
| Sample Rate | 20 Hz per Channel |
|---|---|
| CPU | 586 Processor |
| Communication | 115 kBaud RS-232 serial port |
| Filter Method | 5x over sampling with digital filtering |
For More Information
- View and print product brochures in PDF format
- Request a no-obligation quote with our online quote form
- Contact your Regional Sales Manager.
* LabVIEW and VeriStand are trademarks of National Instruments. Neither Dyne Systems, Inc., nor any software programs or other goods or services offered by Dyne Systems, are affiliated with, endorsed by, or sponsored by National Instruments.



