URPT/MIC & URPR/MIC
ELETTRONICA
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User Manual
Rev. 1.1 - 29/06/12
5.1.2 Mains Power Supply
WARNING: Disconnect mains power supply before beginning these
procedures.
The power supply unit is equipped with own fuses;
check all fuses and voltage
selection block to ensure their are properly rated for the power mains and
change them as required to match mains voltage
.
All mains power supply protection fuses are conveniently located on the rear panel
and on left side, easily accessed from the outside: to check or replace a fuse,
disconnect
equipment from power mains
, unscrew fuse cover and pull fuse out
of socket.
The following fuses are used:
Main Fuses
URPT/MIC (Mic.
Version)
On Mains
(1x) 3.15T 5x20 type
URPT/MIC (Mic.
Version)
On DC Power Input
(1x) 20F automotive
Table 5.1: Fuses
Ensure that the equipment is appropriately set for available mains voltage (supply
voltage rating is reported in the Final Test Table) as follows:
disconnect equipment
from mains
and ensure that the voltage selection block of the power supply,
located under the equipment, is set to the appropriate voltage; change setting as
required.
The exciter, through the ACCESSORY connector, has an input for external power
supply which accepts voltages from about 10,5 to 30 VDC. This source of auxiliary
power supply, which can be used by the user through batteries, has a control
that automatically turns off the power if the voltage falls too much and prevent
irreparable damage: the exciter will turn off when the battery voltage reaches the
10,5 V and will switch on with 11,5 V (by factory).
If you want to use the battery at 24 V is necessary to move the jumper JP7 (on
the card PSDC14URPT) from position 1-2 to position 2-3, in this configuration the
exciter will shut down at 20,5 V and power up again at 22,8 V.
WARNING: If the exciter is used with mains power supply on ACCESSORY
connector pins, dedicated to the entrance with battery, will be present a
voltage of about 29Vcc.
If you want to connect a buffer battery, you must connect a diode (dimensioned for
a forward current of at least 15 A RMS) in series to the battery to avoid damaging
both to the battery and the exciter.
