MA-AL-T135-01-02 Manual TUL135 eng rev2
Rev.2 Page 1 of 4
POWER SUPPLYING UNIT TUL 135
Installation Manual
FUNCTIONS
The power supply is made of: one linear power supply, with serial voltage regulator, limited in constant precision current (r ectangular
limitation); one analogical control circuit and one microcontroller supervision circuit.
Supplying is shared out among three outputs, on terminals protected by corresponding fuses:
BAT: where the back-up battery will be connected OUT1, OUT2 and OUT3: for general charges
The charge of the battery occurs at constant voltage (13,8 Vdc @ 25°C) with limited current.
Leds in the control board (see Fig. 1) show:
Cut fuse for any of the outputs, with Led off (DL9, DL10, DL11)
Current consumption by the charge (2 green and 1 red, DL5, DL6, DL7)
Mains presence (DL1 RETE)
Failures (DL2)
Control of battery efficiency.
The power supply periodically controls the batteries efficiency:
-
At first power supply activation, the microprocessor carries out the test of battery presence after 30 seconds. If battery is
connected, the test will be carried out periodically every 10 minutes whilst, if not connected, it will continue carrying out the
test every 20 seconds, showing the “POWER-SUPPLY FAILURE” on the panel. This anomaly will be kept in memory until a
battery is connected.
-
During standard operating, the battery efficiency is checked watching batteries voltage. If batteries do not manage to mainta in
an acceptable voltage during test, there will be a “BATTERY FAILURE”.
-
In case of missing mains, if the battery voltage is lower than 9,5Vdc, the battery and the charge are disconnected in order to
avoid malfunctioning of the system and to avoid deep discharge of the battery. The battery will be reconnected in case it is
replaced or in case of mains restore.
-
During standard operating, a test of the battery internal resistance is carried out every 90 minutes; if the internal resista nce
happens to be over 1 ohm, there will be a “BATTERY FAILURE”. It will then be necessary to replace the battery and check
that terminals and fuses have a good electrical contact. When the battery is replaced, having mains presence, the test of the
internal resistance is repeated within 5 minutes.
A microcontroller systems checks all possible anomalies and gi
ves a “POWER-SUPPLY FAILURE” in following cases:
The failure indication together with indication of missing mains are located in a connector under the control and supervision board.
In order to avoid a possible failure damaging the charges or the battery, a protection circuit against over-voltages has been inserted,
made by a SCR and a fuse. There also is a fuse for alternated mains supplying. In case of failure in the power supply or of m ains
absence, the battery will supply the electronic circuits.
Chart. 1
ELECTRICAL SPECIFICATIONS
Supplying voltage
230 Vac + 10% / - 15%
AC mains frequency
50 Hz sinusoidal
Current consumption from the mains
0,5 A max (at full charge)
Output voltage
13,8 Vdc (-15% / + 10%)
Minimum output voltage
9,5 Vdc at max charge, in mains absence and with discharged
battery
Voltage of switching-off threshold
9,5 Vdc
Max current consumption
5 A
Adjustment towards mains variations at full charge (+10% / - 15%)
Better than 1%
Adjustment towards charge variations (0 to 100%)
Better than 1%
Residual ondulation (ripple) at full charge
1Vpp (at 195,5 Vac) 30m Vpp (at 253 Vac)
Protection against inversion of battery polarity
Diodes
Interrupted fuses of the outputs
Output voltage lower than threshold (11 Vdc)
Fuse of battery charge
Battery charge absence
An indication for “HIGH VOLTAGE BATTERY” in following cases:
Too high voltage on output (>14Vdc)
An indication of “BATTERY FAILURE” in the following cases:
Battery with voltage under threshold (10,5Vdc)
Battery not connected
Battery with internal resistance over 1 ohm
An indication for “MISSING MAINS” in following cases:
Missing Mains
