The PLC board is a complete Industrial Process Control Demo system. It has four
isolated input channels and four isolated output channels. Total system accuracy
is 0.05%. The input channels have 24 bit resolution (using AD8220 IN-AMP + AD7793 Sigma Delta
ADC), each channel can be configured to accept a wide variety of input signals,
from 4-20ma current loops to to high voltage inputs 0-5, 0-10v, +/-5v, +/-10v.
It can also accommodate RTD/TC inputs. The output module has 16 bit resolution
(AD5422) which has an integrated output driver and built in fault detection and
protection. The AD5422 has the following programmable output ranges, 4-20ma,
0-5v, 0-10v, +/-5v, +/-10v. Each range has 16 bits of resolution. The complete
design uses ADI isolation technology, processors and power management products,
allowing customers to evaluate the whole signal chain.

Features

• Inputs Selectable: 0-20mA, 4-20mA, 0-5V, 0-10V, ±5V, ±10V, RTD, TC
• Outputs Programmable: 0-20mA, 4-20mA, 0-5V, 0-10V, ±5V, ±10V
• FOUR ISOLATED 24 BIT ANALOG INPUT CHANNELS
  
  
  
• AD7793 24 Bit
  Sigma Delta ADC, 40nV Noise
• ADR02 Precision
  5V Ref
• AD8220
  Instrumentation Amplifier, >80db CMRR
• ADUM5401
  isoPower integrated, isolated dc-to-dc converter 500 mW output power

• FOUR ISOLATED 16 BIT ANALOG OUTPUT CHANNELS
  
  
  
  • AD5422 Single
    Channel, 16-Bit, Serial Input, Current Source & Voltage Output DAC
  • 0.05% Total Unadjusted Error (TUE)
  • Single Chip Solution
  • Open and Short Detection and Protection
• POWER/INTERFACE/CONTROL
  
  
  
• ADI ARM 7 ADUC7027
• ADP3339 High
  Accuracy Ultralow Iq, LDO
• ADM3251 Isolated
  Single Channel RS-232 Line Driver/Receiver

PLC Total Solution Diagram

Documentation

The following Technical Note describes the PLC reference
design/evaluation system.
To download the Documentation, select the link
below