VESDA VLS-XXX, Руководство по эксплуатации продукта

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VESDA
® LaserSCANNER Product Manual
21
Table 4 - GPI Functions
Note: The signal voltage into the GPI terminals must be between 5 to 30 VDC. The logic
input states are not defined for any voltages >2 to < 5 VDC at the GPI terminals.
Note: When the detector is isolated or de-isolated as a GPI function, the status cannot be
changed through the normal isolate/de-isolate functions of the Display Module or
the LCD Programmer. When using the Standby or Remote Isolate options it is
recommended that all displays on VESDAnet are configured to have the isolate
button disabled.
Note: When the night-time threshold is configured as a GPI function, it overrides the clock
settings for day-start and night-start.
1.5 Mounting the LaserSCANNER
The LaserSCANNER can be mounted onto the wall or on any suitable secure surface using the
mounting bracket. It is
strongly recommended that the detector is mounted on to the mounting
bracket included with the packaging. Determine the cable entry ports and the air exhaust port
before mounting the detector. Consideration should also be given to the positioning of the pipe
inlet ports in relation to the existing pipe network.
Caution: Press out the relevant knockouts taking care not to damage the relays and
terminals on the termination card.
Securing the mounting bracket
The orientation required for the LaserSCANNER will determine how the mounting bracket is
placed. To secure the mounting bracket to the mounting surface place the flat side against the
surface ensuring that the lances do not sit flush to the surface. The figure below illustrates the
bracket position for normal and inverted orientations. Secure the mounting bracket to the surface
using appropriate fasteners, ensuring that the bracket is horizontally straight and sits flush on the
surface.
Figure 10 - The mounting bracket in normal and inverted orientation
Inverted
Reset This is the reverse of the normal
reset function.
≤
2 VDC detector reset
≥
5 VDC normal operating mode
Reset
Function State change
Normal
Inverted