General Purpose Io - Intrepid Control Systems neoVI Hardware Help

Intrepid Hardware Help

General Purpose IO

General Purpose IO
Main
A pplies to
neoVI Red and neoVI FIRE
Overview
neoVI has six general purpose 3.3 VDC IO pins. These are labeled as MISC signals on the neoVI connector. These pins can be used for controlling or m onitoring ex ternal devices.
Basic Setup
The MISC IO are setup in the neoVI 3G Ex plorer. Figure 1 shows the input output configuration. This is done by selecting Initial Values under MISC IO from the tree. O n the panel shown, you can setup the direction, type, and
initial state of each IO pin.
The outputs are capable of LED drive through a current lim iting resistor. The m ax im um current of all outputs should not ex ceed 5 m A. For protection, each IO pin has a series 47 ohm resistor and a transient protection device.
The ground pin on 9 pin connector is a reference pin. This pin is not intended to sink current.
A nalog Inputs
MISC pins 3 through 6 can be setup as analog inputs. To enable an analog input, you can select "Analog inputs" from the "Initial Setup" window.
General IO Reporting
You can setup the general IO to be autom atically reported to the host in neoVI 3G Ex plorer (figure 2). You can setup the general IO to be reported at an interval or based on digital inputs changing (figure 2 : bubble 1). The
report will be sent to the host as a neoVI Device Virtual Network m essage.
W hen reporting based on interval is selected you can select the interval from the drop down box shown in bubble 2 in figure 2. You can select an interval from 1 to 125 m s.
If you selected a report based on digital change, you can select both an interval the inputs are tested (figure 2 : bubble 2) and which digital inputs to test (figure 2 : bubble 3). You can select as m any as are listed.
Figure 1 - neoVI MISC pins can be setup as digital outputs, digital inputs or analog inputs.
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