New RTD Data Acquisition 8-Layer Stackable Card for Raspberry Pi View larger

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Sequent Microsystems RTD Data Acquisition 8-Layer Stackable Card for Raspberry Pi

0104110000076779

New product

  • Two ADS1248 24 bit delta-sigma converters (four channels each)
  • Factory accuracy: 0.1%
  • Maximum accuracy (through calibration): 0.01%
  • Pluggable connectors
  • On-board hardware watchdog
  • On-board resettable fuse
  • Eight Level Stackable
  • Command line, Python drivers
  • Node-Red code examples
  • Optional -50°C to 450°C PT100 thermocouples


See description for more details about the product.

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194,71 lei
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The price includes the costs for collection, treatment and ellimination of WEEE

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Description


RTD Data Acquisition Card for Raspberry Pi


Compatible with all Raspberry Pi versions from Zero to 4, tte RTD Data Acquisition Card offers a compact and inexpensive solution for reading and storing data from up to 64 RTD-100 temperature sensors. Using two ADS1248 24 bit delta-sigma converters with four channels each, the card achieves better than 0.1%. Field calibration with a precision 100Ω resistor can lead to 0.01% precision.

Since temperature measurement using RTD is based on resistance, the resistance in the lead wires and connectors must be taken into account when calculating the overall resistance in the system circuit. Using a 3-wire circuit design allows lead wire resistance to be factored out of the overall calculation. The card is compatible with all Raspberry Pi versions from Zero to 4


COMPATIBILITY


The card is compatible with all Raspberry Pi versions from Zero to 4.. The card share the I2C bus using only two of the Raspberry Pi’s GPIO pins to manage all eight cards. This feature leaves the remaining 24 GPIOs available for the user.


POWER REQUIREMENTS


The Home Automation card needs 5V to operate and can be powered from Raspberry Pi or from it’s own 2.1mm barrel connector. The cards needs 50mA to operate.


SOFTWARE INTERFACES


You can write your own Data Acquisition system in C, C++, PERL or the language of your choice using the Command Line functions or the Python Driver. A browser interface can easily be deployed using Node-Red.


FIELD CALIBRATION


Field calibration to 0.01% precision can be achieved using an external, 100Ω high precision resistor. Software commands permit the user to calibrate the card in two points (zeroΩ and 100Ω). The resulting values are stored in flash and used for subsequent temperature measurements.


STACKING MULTIPLE CARDS


Up to eight RTD Data Acquisition cards can be stacked on your Raspberry Pi. Each card is identified by jumpers you install to indicate the level in the stack. Cards can be installed in any order. For your convenience, two stack jumpers are provided with each card.


OPEN SOURCE HARDWARE


User’s Guide and Schematics of the RTD Data Acquisition card can be downloaded from our website. A simple browser interface can be deployed using the Node Red node provided


DIN-RAIL MOUNTING


Install your Raspberry Pi and up to eight DRT Data Acquisition cards parallel to the DIN-Rail using our DIN-RAIL Kit Type-1. Install the whole assembly perpendicular to the DIN-Rail using the DIN-RAIL Kit Type-2.


WHAT’S IN YOUR KIT


• MEGA-RTD add-on card for Raspberry Pi



8-Channel RTD Data Acquisition Card for Raspberry Pi


Mounting hardware

  • Four Four M2.5x18mm male-female brass standoffs
  • Four M2.5x5mm brass screws
  • Four M2.5 brass nuts



• Two jumpers



• Eight 3-pin female mating connector plugs.



PT100 Thermocouples (optional)



The PT100 thermocouples have 3 wires for precise temperature measurements. They have a range of -50°C to 450°C, 2 meter long wires and a 4mm x 6mm probe.


QUICK STARTUP GUIDE


1. Plug your MEGA-RTD card on top of your Raspberry Pi and power up the system.

2. Enable I2C communication on Raspberry Pi using raspi-config.

3. Install the MEGA-RTD software from github.com:

1. ~$ git clone https://github.com/SequentMicrosystems/megartd-rpi.git

2. ~$ cd /home/pi/megartd-rpi

3. ~/megartd-rpi$ sudo make install

4. ~/megartd-rpi$ megartd


The program will respond with a list of available commands.

Specification
Weight 75 g
Dimensions 10 × 7 × 2 cm
ANALOG INPUTS 8 ea. 100 Ω RTD
POWER SUPPLY 4.75-5.25V/3A


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Sequent Microsystems RTD Data Acquisition 8-Layer Stackable Card for Raspberry Pi

Sequent Microsystems RTD Data Acquisition 8-Layer Stackable Card for Raspberry Pi

  • Two ADS1248 24 bit delta-sigma converters (four channels each)
  • Factory accuracy: 0.1%
  • Maximum accuracy (through calibration): 0.01%
  • Pluggable connectors
  • On-board hardware watchdog
  • On-board resettable fuse
  • Eight Level Stackable
  • Command line, Python drivers
  • Node-Red code examples
  • Optional -50°C to 450°C PT100 thermocouples


See description for more details about the product.

Add to cart now!

Download