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Signal Conditioning Card
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Data Acquisition / Signal Conditioning Card

Overview

Dexcel’s Multifunction Signal Conditioning Card offers 16 analog and 20 digital isolated channels along with 4 isolated Analog Outputs and 8 Potential Free Digital Outputs. Analog Outputs and Inputs are capable of source and measure 4 – 20 mA of current. This card can be interfaced to the PC or data logging equipment using redundant RS-232 interfaces. This card is also capable of doing 4 channels RS232 to RS485 conversion.

Functionality

The Altera Cyclone – III FPGA present on this card configures and captures the data on every channel. The data captured by the Signal Conditioning card is fed to the data-logger via RS485 interface. Redundancy is provided on the RS485 Interface for a reliable data transfer. The data-logger can also control the Analog and Digital Outputs using same RS485 port.

A high precision Sigma Delta ADC and current output DACs are present on this card for measuring and sourcing the 4-20mA current on AI and AO channels. The data acquisition of all the 16 AI channels is done at the rate of 12.5Hz. The Digital Outputs of the card are provided with Potential Free Relay Contacts. Isolated digital Inputs can sense the states of 20 input channels.

Four Isolated RS485 ports are available on card for the user applications. Isolation is provided on each I/O channels of the signal conditioning card as a safety measure against the transients. This card supports redundant arrangement in the input 24VDC Power Supply.

Signal Conditioning Card

Application

  • Signal Conditioning and Data Acquisition in Industrial Applications.
  • Industrial Control Systems.

Customization

  • PC communication data format and number of channels can be customized.
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