The following are some basic facts about input loop power sources: The input module usually isn't a loop power source. Although 120V is common for digital loops, other voltages are also used. There ...
Designers now have a way to reduce power, system cost, and size for programmable logic controller (PLC) digital-input subsystems, with the Corona (MAXREFDES12#) reference design by Maxim Integrated ...
Industrial digital inputs sample and serialize the state of eight 24-V current-sinking inputs under SPI or pin-based timing control, allowing for readout of the eight states via SPI. Here is an ...
In the previous two issues of this newsletter, we looked at troubleshooting digital input modules. Basically, we looked for the presence or absence of a voltage. With analog modules, it's trickier ...
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