'Hardware' task card
C-NET detector line
10
124 | 412
Building Technologies
A6V10210424_j_en_--
Fire Safety
2018-08-29
'EVAC tone'
This setting specifies the tone in the 'Evac' mode.
'Sounder volume'
This setting specifies the sound level in the activated status.
10.3.5 External alarm indicator
Some C-NET devices have an output for an
external alarm indicator. The output
can be used to actuate an external alarm indicator and for controls.
Setting the properties of the external alarm indicator
1. Select the 'Hardware' task card.
2. In the tree view, open the
'Station' > the
line card > the
loop or the
stub.
3. Open the device with one output for an external alarm indicator.
4. Highlight the element 'Ext. AI'.
5. Set the properties you want in the detail editor. The properties are described in
the following sections.
Figure 31: Properties in the detail editor of one output for an external alarm indicator
'Output mode'
Outputs in 'Inactive: On / active: Off' mode are not EN 54-relevant and therefore
are not fail-safe.
The setting defines the behavior of the output signal in the active or inactive status
of the logic. Examples:
●
'Inactive: Off / active: On': The output signal is deactivated when the logic is
inactive and activated when it is active.
●
'Inactive: Off / active: Intermittent, fast (0.25s/0.25s)': The output signal is
deactivated when the logic is inactive. When the logic is active, it is 0.25 s
HIGH and 0.25 s LOW (alternating).
●
'Always Off': The output signal is deactivated when the logic is either inactive or
active.
'Output fail safe position'
This setting specifies the position of the output if the communication between
device and line interface is disrupted or if the line voltage fails.