SATEL MICRA 9
3.7 CONNECTING POWER SUPPLY AND STARTING THE MODULE
It is not advisable to power up the device if the antenna is not connected.
Never connect two devices with power supply unit to one transformer.
Before adding transformer to a circuit from which it will be powered, make sure
the circuit is de-energized.
It is not allowed to connect a fully discharged battery (with voltage across
unloaded terminals less than 11 V) to the module. In order to avoid any damage
to the equipment, if the battery is fully discharged, precharge it by means of
a suitable charger.
The MICRA module must be supplied with 18 V (±10%) alternating voltage. Use the
transformer secondary winding to power the module. It is recommended that a transformer
with at least 40 VA output current be used. The transformer should be permanently
connected to the 230 V AC mains. Hence, before you begin the cabling work, make yourself
familiar with the electric system in the building. A circuit which is always alive should be
selected for power supply. The power supply circuit should be protected with a proper safety
device. Let the owner / user of the security system to know how the transformer should be
disconnected from the mains supply (e.g. by indicating the fuse which protects the module
supply circuit).
A 12 V / 7 Ah battery should be connected to the MICRA module as backup power supply.
Note: If the battery voltage drops below 11 V for longer than 12 minutes (3 battery tests), the
module will indicate battery failure. When the voltage goes down to approx. 10.5 V, the
battery will be disconnected.
The module should be started in the following order:
1. Make sure that the antenna is connected to its socket on the electronics board.
2. Deenergize the 230 V AC circuit to which the transformer is to be connected.
3. Connect the 230 V alternating voltage wires to the terminals of transformer primary
winding.
4. Connect the terminals of transformer secondary winding to the AC terminals on module
electronics board.
5. Connect the battery to the dedicated leads (red one to the battery “plus”, black one to
“minus”). The module will not start after connecting the battery alone. The battery
cable ends must not be cut off.
6. Turn on 230 V AC power supply in the circuit to which the transformer is connected. The
module will start operating.
Note: The above mentioned power-up sequence (battery first, 230 V AC mains after) will
permit proper operation of the power supply unit and electronic protection circuits, thus
preventing defects which might be caused by possible installation errors. Should
a situation occur when the power supply has to be entirely disconnected, disconnect
first the AC voltage and then the battery.
7. Connect the computer to the module RS-232 (TTL) port (see: section "Local programming
through RS-232 (TTL) port").
8. Turn on the module power supply.
9. Using the GPRS-S
OFT program, define PIN code for the SIM card (if the card requires
entering the PIN code) to be installed in the module.
10. Turn off the module power supply.
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