Ross openGear GPI-8941 Series, User Manual

Page: 52 / 92

52 • Configuring the GPI Outputs GPI-8941 User Guide (v9.0)
4. Use the Type menu to specify whether the circuit is Wet or Dry. Choose from the following:
• Contact Closure — When the output is on the output pins are connected together by a pair of relay contacts.
When the output is off the output pins are not connected. The output pins are isolated from the card circuit.
(Dry)
• Voltage Source — When the output is on the + output pin is connected to an in5VDC power supply.
When the output is off the + output pin is not connected. The other output pin is always connected to ground.
(Wet)
5. Use the Polarity menu for level-triggered GPI outputs to set whether triggers are Normal (Active High) or
Inverted (Active Low).
6. Use the Power Up State menu to set the state of the GPI Output after a card power cycle.
7. Use the Pulse Width menu to specify the number of milliseconds (mS) a pulse will be sent.
8. Use the Output menu to specify the behavior of the GPI Output. Choose from the following:
• Pulse — select this option to generate a pulse when triggered. The pulse must be completely finished before
it can be triggered again.
• Maintained — select if the GPI output is level triggered where ON is High and OFF is Low. The Pulse
Width setting is ignored.
• Retrig. Pulse — the card will generate a pulse when triggered. If the card receives anther trigger before the
end of the pulse, the pulse will be extended by the Pulse Width time.
9. Use the Timing menu to specify whether to use the Timing Window options specified in the Config tab.
Choose from the following:
• Immediate — the Timing Window settings are ignored. Commands are executed without pauses.
• Synced — the Timing Window settings are applied. Commands are executed during the Timing Window as
determined by the Start and Stop lines for the reference signal in use.

If the GPI output is set to Synced and if the reference is not configured or invalid, the timing is immediate.