DL205 User Manual, 4th Edition, Rev. B
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Chapter 2: Installation, Wiring and Specifications
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Glossary of Specification Terms
Inputs or Outputs Per Module
Indicates number of input or output points per module and designates current sinking,
current sourcing, or either.
Commons Per Module
Number of commons per module and their electrical characteristics.
Input Voltage Range
The operating voltage range of the input circuit.
Output Voltage Range
The operating voltage range of the output circuit.
Peak Voltage
Maximum voltage allowed for the input circuit.
AC Frequency
AC modules are designed to operate within a specific frequency range.
ON Voltage Level
The voltage level at which the input point will turn ON.
OFF Voltage Level
The voltage level at which the input point will turn OFF.
Input impedance
Input impedance can be used to calculate input current for a particular operating voltage.
Input Current
Typical operating current for an active (ON) input.
Minimum ON Current
The minimum current for the input circuit to operate reliably in the ON state.
Maximum OFF Current
The maximum current for the input circuit to operate reliably in the OFF state.
Minimum Load
The minimum load current for the output circuit to operate properly.
External DC Required
Some output modules require external power for the output circuitry.
ON Voltage Drop
Sometimes called “saturation voltage”, it is the voltage measured from an output point to its
common terminal when the output is ON at max. load.
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