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© Sealevel Systems, Inc. 8012e Manual | SL9225 12/2022
Negative Logic
PIO cards
Inputs: If the threshold voltage has not been met the API
returns a 1.
If the input threshold voltage has been met the API
returns a 0.
Outputs: If a 0 is written to the port the output is 3-5v.
If a 1 is written to the port the output is 0v.
DIO cards
Inputs:
If the input threshold voltage has not been met the
API returns a 1.
If the input threshold voltage has been met the API
returns a 0.
Outputs:
If a 0 is written to the port the relay is energized.
If a 1 is written to the port the relay is de-
energized.
Additional information for Positive and Negative logic choices can be located in the SeaIO Software
Information Help file found here: Start – All Programs – SeaIO – SeaIO Help - Logic States.
