IMO i3N Series, Руководство пользователя

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7.3 Digital Inputs
NOTE: The digital inputs on the I3N are designed for low-voltage DC inputs . The inputs are designed to
support both positive and negative input modes. The mode is set by a configuration parameter in I3
configurator. All the inputs on the unit must be configured to the same mode.
Figure 7.1 – Positive and Negative Inputs
In positive logic mode a positive voltage applied to the input will turn the input. The internal design of this
mode is basically a resistor from the input to I/O ground. This mode is sometimes called sourcing.
In negative logic mode, connecting the input to the I/O ground or 0V will turn the input on. The internal
design of this mode is basically a resistor from the input to the positive I/O voltage (usually 12 or 24V).
This mode is sometimes called sinking.
I1
0V
001XLE036
12-24VDC
I1
0V
Positive Logic In Negative Logic In
Positive Logic vs. Negative Logic Wiring
The RCC SERIES CONTROLLER can be wired for Positive Logic
inputs or Negative Logic inputs.