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10.4 Power supply
Operation modes
The power supply for the ↑ 'Stations' has the following operation modes:
● Operation with battery backup
– The power supply unit feeds the hardware with system voltage,
continuously charging the batteries. In the event of mains voltage failure,
the batteries take over the power supply of the 'Station' without interruption.
● Operation without battery backup
– The power supply unit feeds the hardware with system voltage. The
emergency power supply is ensured via an externally buffered network.
● Operation with an external DC power supply unit
– The supply comes directly via a 24 V feed line. This is the normal operation
mode for the fire terminal FT724.
● Operation with redundant supply
– The fire terminal can be supplied with a 24 V voltage through a fire control
panel. In accordance with EN 54, a redundant supply source is required in
this case. The fire terminal board is therefore provided with two
independent DC supply inputs.
Features
The following properties can be set for the power supply:
● Mains supervision: Monitoring for power loss.
● Battery supervision: Monitoring switched on or off.
● Converter supervision: Monitoring switched on or off.
● ↑ Emergency power operation: Delay time for fault display in the case of power
loss.
Setting properties
Depending on the operation mode, certain forms of monitoring must be ↑ switched
off. Normally when the station is equipped with a power supply unit and batteries,
no monitorings need deactivating. The configuration of the delay time for the fault
indication in case of a power failure is independent from the operation mode.
Figure 40: Detail editor with settings for the power supply
To set the properties, proceed as follows:
1. Select the 'Hardware' task card.
2. Open a 'Station' in the tree view.
3. Highlight 'Power supply FC' or 'Power supply FT'.
4. Activate/deactivate the checkboxes as indicated in the following table in the
'Overview' tab of the detail editor.
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