SATEL
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5.12 Connecting the power supply and starting the control panel
Do not connect power until all installation operations are completed.
5.12.1 Main power supply
The control panel requires 18 VAC (±10%) power supply. It is recommended that
a transformer with up to 40 VA rating be used.
The transformer should be permanently connected to the 230 VAC mains supply. Before you
make the cabling, familiarize yourself with the electrical installation of the facility. Make sure
that the circuit you choose for powering the control panel will be always alive. The circuit
must be provided with a 2-pole switch disconnector with at least 3 mm contact separation
and/or short-circuit protection with a 16 A time-delay fuse. The owner or user of the alarm
system should be instructed on how to disconnect the transformer from the mains (e.g. by
indicating the fuse which protects the control panel supply circuit).
Do not connect two devices with power supply to one-section transformer.
Before connecting transformer to a circuit from which it will be powered, make
sure the circuit is de-energized.
5.12.2 Backup power supply
A 12 V lead-acid sealed battery should be connected to the control panel as a backup power
source. The battery capacity must be adequately selected to match current consumption in
the system. According to EN 50131 Grade 2, the battery must ensure operation of the system
without mains supply for 12 hours.
If the battery voltage drops below 11 V for longer than 12 minutes (3 battery tests), the
control panel will indicate battery failure. When the voltage goes down to approx. 10.5 V, the
battery will be disconnected.
Do not connect deeply discharged battery to the control panel (with voltage
across unloaded terminals below 11 V). The battery should be precharged with
a proper charger.
The used batteries must not be discarded, but should be disposed of in
accordance with the existing rules for environment protection.
5.12.3 Control panel power-up / start-up procedure
1. De-energize the 230 VAC circuit to which the transformer is to be connected.
2. Connect the 230 VAC wires to the terminals of transformer primary winding.
3. Connect the terminals of transformer secondary winding to the control panel AC
terminals. To make the connection, use flexible conductors with a cross-section of 0.5 –
0.75 mm
2
, or rigid conductors with a cross-section of 1 – 2.5 mm
2
.
4. Connect the battery to the dedicated leads (positive terminal to RED lead, negative
terminal to BLACK lead). If the battery has screw-type cable lugs, use adapters delivered
with the control panel (do not cut off the battery cable lugs).
The control panel will not
start after connecting the battery alone.
5. Turn on 230 VAC power supply in the circuit to which the transformer is connected.
The control panel will start operating.
The above mentioned power-up sequence (first the battery, then the 230 VAC mains)
will ensure proper operation of the power supply unit and the electronic protection
circuits, thus preventing damage to the alarm system components caused by
installation mistakes, if any.
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