Grass Valley SSP-3801 User Guide v.1.3 - Manual (Page 21)

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SSP-3801
User Guide
Configuring the General Purpose Input/Output (GPIO) triggers
The SSP-3801 card has two General Purpose Input/Output (GPIO) connectors offering up to
four opto-isolated, open collector GPIOs. The pinouts are 1|G|2 and 3|G|4. The GPIO pins
function both as inputs and outputs. As inputs they can be used to trigger internal pre-
programmed actions and as outputs they can be used to trigger downstream external
hardware. It is not recommended to use the GPIO pins as both inputs and outputs
simultaneously.
When used as an output, the GPIO operates as follows:
• ON: the GPIO pin is internally driven to ground by an opto-isolated, open collector
transistor (active low is represented by 1V or less) and can sink up to 20mA.
• OFF: the GPIO pin is internally pulled weakly high.
When used as an input, the GPIO input is activated as follows:
• ON: the GPIO pin is connected to 0V.
• OFF: the GPIO pin is not connected (the GPIO signal pin is pulled high).
A change from one state to another when the pin is used as an input can be configured to
trigger an action in the playlist. On the GPI Triggers page, you can configure the SSP-3801
card to perform one of the following actions when an input changes to an On or Off state:
• No Action: a change to the state is not acted upon.
• Take Next: a change to the state triggers a Take Next action, which places the next
event in the playlist on air.
• Cue Next: a change to the state triggers a Cue Next action, which cues the next primary
event, its related secondary events, and any subsequent automatic events so they are
ready to go on air safely when a Take Next action is performed.
• Hold Next: a change to the state triggers a Hold Next action, which prevents the next
events from going on-air.
• Drop Next: a change to the state triggers a Drop Next action, which removes the next
event in the playlist.
To configure the GPI triggers:
1 Select Channel Configuration > GPI Triggers. The GPI Triggers page opens.
Fig. 2-6: GPI Triggers page