Xtralis VESDA VLC-500-EX, Руководство по эксплуатации продукта

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VESDA VLC-EX Product Guide VESDA by Xtralis
12 www.xtralis.com
3.5 Relay settings and conditions to change states
Table 3-4: Default relay settings and conditions to change state
Relay # Relay Condition for relay to change state
1 Fault This relay is de-energized when one of the following
conditions occur:
l
Fault found on detector or on VESDAnet loop
l
Air flow normalization is initiated
l
System isolation is initiated
When the Overlay Alert function has been selected,
this relay is de-energized once the Alert threshold is
initiated
2 Pre-Alarm This relay is energized once the Pre-Alarm
threshold is initiated
3 Fire This relay is energized once the Fire alarm
threshold is initiated
3.6 Auxiliary / GPI Terminals
The Bias, Reset (GPI) and LED terminals are located on the termination card (refer to Figure 6-1 on page 19
and Figure 6-2 on page 20). These terminals have the following functions:
l
Bias Terminals: These output terminals provide a 10 VDC supply to initiate the reset input terminals via
a remote reset/isolate switch.
l
LED Terminals: These output terminals provide a 5 V, 15 mA DC supply via a 220 ohm resistor to power
a remote LED.
l
Reset (GPI) Terminals: These terminals are also known as the General Purpose Input (GPI) and are
used for Reset, Mains OK or Standby functions. The input terminals require a voltage supply between 5
V and 24 VDC to operate. The voltage input to these terminals is isolated from the system by an opto-
coupler device. Connect the Reset (+) terminal to the positive output and the Reset (-) terminal to the
ground output of the external device.
Table 3-5: GPI functions
Function State Change
Mains OK The detector monitors the state of the
external power supply and responds to the
following conditions.
Mains OK ≥ 5 VDC is at this terminal
Mains Fail ≤ 2 VDC is at this terminal
Standby Mode The detector Isolates and the aspirator
turns OFF when ≥ 5 VDC is at this
terminal.
No Alarms can be generated in this state
Reset Isolate While power is applied to the GPI the
detector is isolated. In addition, the
connection of power to the GPI resets the
unit.
≥ 5 VDC Detector Isolates
≤ 2 VDC Detector Reset