Module types
In general, modules are classified as analog, digital, communication, controller, and specialty. They differ by the number of channels, the ranges of input and output they are capable of handling, and by the special features that are optionally available. In this section, we will explore the base module types and explain the possible feature sets.
Analog modules
The analog modules process the input and output of signals that vary by current and voltage and translate to real-world values such as pressure, temperature, and flow. The analog modules vary by the number channels (4 to 16), the operating temperature range, the maximum isolation voltage they can handle, the range of current (0 mA to 21 mA), and the range of voltage (+/- 25 ...
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