Venitem TUL375 Installation Manual

The Power Supply TUL 375 has been designed to be used as a Power Unit with power reserve in Fire Alarm Systems in conformity to regulation (EU)
No 305/2011.
Its mechanical and electrical features make it complying to EN 54-4: 2007 Standard (Fire Alarm detecting and signaling devices. Part 4 : Power
supply devices) which includes A1:2002 and A2:2006 updates.
The power supply unit is made by a linear power supply, series adjustment, with serial voltage regulator, limited in constant precision current
(rectangular limitation), two 12V 17 Ah batteries (not given within) analogical control circuit and micro-controlled supervision circuit.
Supplying is divided on 3 terminal-outputs protected by fuses:
BAT: where the back-up battery will be connected
OUT 1, OUT2 and OUT3: for generic charges
The charge of the battery occurs at constant tension (27,6 V @ 25°C) with temperature compensation and current limitation. Maximum current supplied
by the power is 5 A with 3 A for charge and 2 A for the battery.
The LED on the control board are close to concerned fuses (see pict.1) and show:
- Fuse cut for any of the outputs, with Led off (DL9, DL10, DL11)
-
Current consumed by charge (2 green and one red DL5, DL6, DL7)
-
Mains presence (DL1 RETE)

Check of battery efficiency

The power supply periodically carries out the efficiency of the batteries:
At first activation of the power supply, the microprocessor will carry out the test of battery presence after about 30 seconds. If connected, the test will
be carried out every 10 minutes whilst in case it is not connected, it will continue carry out the test every 20 seconds showing indication FAILURE.
During normal functioning, the efficiency of the battery is checked by controlling the batteries tension. If batteries do not manage to maintain an
acceptable tension during test, there will be the indication FAILURE.
A test of the internal resistance of the battery is carried out during normal functioning, every 1,5 hours (in conformity to attachment EN54-4/A2); if the
internal resistance is over 1 ohm, there will be a FAILURE indication. It will then be necessary to replace the batteries and check that terminals and
Fuses have a good electrical contact. When the battery is replaced, with presence of mains tension, the test of internal resistance is repeated every 5
minutes.
A microcontroller system controls various possible anomalies and gives a FAILURE indication in the following conditions:
1. Output Fuses interruptions
2. Overloaded Battery (> 30 V)
3. Low Battery Tension (< 21 V)
4. Power absence and no battery charge
5. Disconnected Battery
Internal battery resistance >1 Ώ
6.
The indication of failure together with the indication of mains absence are in a connector placed on the control and supervision board.
In order to avoid that a possible failure in the series regulator damages the charges or the battery, a protection circuit has been inserted against over-
tensions, made of a SCR and a fuse. A fuse for mains alternated supplying is also present.
In case of failure in the power supply or of mains missing, supplying of the logic and control circuits occurs by means of battery.
Supplying tension
Ac mains frequency
Current consumption by mains
Output tension
Minimum output tension
Switching-off threshold tension
Output current
Max current for battery recharge
Max current for charges
Regulations towards mains variations at full charge (+10% / -15%)
Regulations towards charge variations (0 to 100%)
Ripple at full charge
Compensation of output tension according to temperature
Protection against battery polarity inversion
Recommended batteries: 2 x 12 V in series, 17 Ah housing with
inflammability class UL-94-V2 or better
Alarm threshold of battery internal resistance
Missing mains and failure output relay – dry contacts
MA-AL-T75E-01-03 Manual TUL375EN eng rev3
POWER SUPPLY TUL375 EN
CERTIFIED UNI EN54-4:2007. Included updating A1:2002 and A2:2006

Electrical Specifications

Installation Manual

GENERAL FEATURES

FUNCTIONAL FEATURES

230 Vac +10% / -15%
50 Hz sinusoidal
1,1 A max. ( full load )
27,6 Vdc ( -15% / +10%)
20 Vdc at max charge, with mains absence and battery
discharged
20 Vdc
5 A max. (see pict.4)
3 A
2 A
Better than 1%
Better than 1%
1 Vpp ( at 195,5 Vac ) 30mVpp ( at 253 Vac )
4 mV/ K
Diode
Type:YUASA NP 17-12 or equivalent.
1Ω
25 Vac or 60 Vdc 1A MAX
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