Page 23 - EngineerIT August 2022 Digital

INDUSTRY 4.0

Figure 4: Block diagram of the AD74413R discrete power solution.

These capabilities allow users to remotely troubleshoot any
faults occurring in their system. In many existing systems,
sensors and actuators may be located far away from the
control room and in potentially hazardous areas. In addition,
crowded cabling may also make it difficult to determine which
cables are connected to which sensor or actuator, making it
Figure 2: AD74413R with required external components for all functions.
cost prohibitive and time-consuming to physically rewire these
systems. The AD74413R modules provide configurability and
Fault detection and diagnostic capabilities diagnostics to determine which sensor or actuator is connected
The AD74413R is equipped with automatic fault detection to a particular channel.
and different diagnostic functions to help in fault isolation.
The ALERT pin is asserted and can be used to interrupt the Isolated power and data solution
microcontroller during a fault condition. Then users can Discrete implementation
interrogate an alert register to determine the exact cause of A discrete isolated power solution for the AD74413R requires
the fault. Users can also enable diagnostic signals to further multiple components, as shown in Figure 4. Separate isolators
diagnose the identified fault. are used to provide power and data isolation. This creates the
problem of having a large board area due to the increased
These are the faults that can be detected by the AD74413R: number of components.
• Reset
• Calibration memory error ADP1032 solution
• SPI CRC error Figure 5 shows the block diagram of the AD74413R powered
• ADC error by the ADP1032. The ADP1032 satisfies the requirement for
• Power supply error isolated power and data channels by having two isolated
• Temperature error and regulated rails and seven data isolation channels all
• Open-circuit/short-circuit error in one package. This provides a board area reduction of
~3× compared to having discrete power and data isolation
solutions. This allows customers to increase the overall

Figure 3: Software configurable I/O fault detection. Figure 5: A block diagram of the AD74413R powered by the ADP1032.

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