Urmet EASY2 1742 Manual Del Usuario página 15

The distribution boxes are factory-set with the 6
"PP" dip-switches in the 00 position.
DS1742-001D
1742/34
EASY 2 WIRE POWER SUPPLY
Ref. 1042/20
The Easy 2 Wire power supply
required in the case in which optional modules are
installed (electronic repertory or display Module)
combined with the Call Module or when the back-up
power supply with battery is also used in the
installation. The Ref. 1042/20 power supply powers
these optional modules and/or the back-up power
supply Ref. 1042/21.
BACK-UP POWER SUPPLY
Ref. 1042/21
The function of the Ref. 1042/21 back-up power
supply is to power the house phone system in the
case of a blackout. The system will continue to
operate for all the time during which the battery is
able to provide sufficient energy.
As already indicated, the back-up power supply
taps the power for the Easy 2 Wire power supply
Ref. 1042/20. Therefore the back-up power supply
is not connected to the mains.
The back-up power supply also comprises a circuit
required to recharge the battery and is complete
with specific led type indicators for display of the
various operating conditions.
For the characteristics and functioning of the above
power supplies, refer to the instructions handbook
of the power supplies.
Ref. 1042/20 is
15