More options for strain gauge convertors
A
Mantracourt Electronics product story
Edited by the Engineeringtalk editorial team
May 30, 2005
Mantracourt has once again built on the success of its Digital Strain Card and launched two additional protocols to the existing range of ASCII, Modbus and Mantrabus protocols.
The DCell and DSC are miniature, high-precision strain gauge convertors or digitisers that convert a strain gauge sensor input to a specific output.
They allow multiple high precision measurements to be made over a low-cost two-wire link.
Outputs can be accessed directly by PLCs or computers, or connected via various types of network, all without compromising accuracy.
Mantracourt has once again built on the success of its Digital Strain Card and launched two additional protocols to the existing range of ASCII, Modbus and Mantrabus protocols.
The MantraCAN device is configurable via a proprietary MantraCAN protocol but is able to stream data in a customisable manner to suit most CAN networks, ie CANOpen or J1939.
This streamed data does not support any interaction, parameter writing or action commands.
However all this can be achieved using the MantraCAN protocol.
Customisable start and stop messages allow the instrument streaming to be controlled via the host CAN network.
The CANopen protocol is configurable using a CANopen configuration tool and will enable customers to add these modules effortlessly to their existing CANopen networks.
Both packages whether it is the "in-cell" DCell or the card format DSC offer impressive specifications with bitrates of up to 1Mbit/s and sampling rates to 200Hz can now be achieved with extreme noise immunity - 5x heavy industrial level.
Instead of percentage full scale, the base measurement is in millivolts per volt and is factory calibrated to within 0.1% of full-scale output.
A diagnostic LED is used to indicate that the device is powered and working correctly.
The LED is also used to indicate which protocol the device is using.
The operating voltage of both products is 5.5 to 18V, allowing the device to be powered from a wider range of available system supplies.
DC excitation has also now been employed allowing longer cable lengths for the load cells which is particularly useful for DSC.
This is a four-wire measurement.
Peak and Trough measurements are available to allow the faster rates to hold a peak or trough readings.
These are stored in volatile memory and are therefore reset on power up.
Evaluation kits are available for all protocols and Instrument Explorer, Mantracourt's freeware software, is available with these products to assist in the evaluation and calibration allowing immediate communication with a range of Mantracourt instruments.
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