VESDA VLI Product Guide VESDA by Xtralis
44 www.xtralis.com
Function State Change
Standby Mode The detector is disabled and the aspirator
switched OFF when ≥ 5 VDC is at this
terminal.
Note: No Alarms can be generated in
this state.
Disable The detector disables when the voltage
rises above 5 VDC and is enabled when
the voltage falls below 5 VDC.
Use Night-time
Threshold
The detector switches over from day-time
to night-time thresholds when ≥ 5 VDC is
at these terminals.
Reset + Disable While power is applied to the GPI the
detector is disabled. In addition, the
disconnection or connection of power to
the GPI resets the unit.
l ≥ 5 VDC detector disables.
l ≤ 2 VDC detector reset.
Inverted Reset
(VLI-885 only)
The detector is reset on falling edge 5
VDC to 0 VDC.
Table 5-3: Unmonitored GPI Operation (continued...)
Notes:
l The signal voltage into the GPI terminals must be between 5 to 30 VDC.
l When the detector is disabled, enabled or set to standby as a GPI function, the status cannot be changed
through the normal enable / disable / standby functions of the Display Module or the LCD Programmer.
l When the night-time threshold is configured as a GPI function, it overrides the clock settings for day-start
and night-start.
When using the standby or remote disable options it is recommended that all displays on VESDAnet are
configured to have the Isolate button locked out. When programming the display through the LCD Programmer
choose Isolate Disabled from the Button Lockout menu.
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