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User Manual
Rev. 1.0 - 29/06/09
PJ2500M-C, PJ3000HE, PJ3500M-C,
PJ4000U-K & PJ5000U-K
The PFC can work with input supply voltages from 90 V to 250 V. A rectified voltage
of 350 V is present on the output.
In place of PFC units, can be installed “traditional” rectifiers units (without power
factor corrector). Its task is to rectify and stabilize the shape of the voltage produced
by the power supply modules by fixing the voltage value to the value required by
the internal circuitry.
This card also applies a resistive load when the amplifier is turned on and excludes
said load after a short time to reduce current peaks in the transformer on turning
it on (
SOFT-START
).
8.2.4 PS-RF Interface Board
This interface board is installed at the back of the amplifier for collecting the main
signals of the machine and making them available on the connectors. This interface
is connected to the three rectifiers, the CPU, the fans, the transformer from which
it receives the signals and to which it issues commands.
This interface card is designed to make the PS part communicate with the RF
part and making available the dedicated signals at the specific connector for each
part.
8.2.5 LEDs Board
Three LEDs are present on this board for indicating the operating status of the
three power supply modules.
The lighting up of a LED indicates a malfunction in the associated module.
8.2.6 CPU
This subsystem is made up of three cards: the CPU card, the display card and
the analog card.
The CPU subsystem implements all the software functions (measurements,
protection, control, data display, communications) outlined in the previous
chapters.
This card carries the signals to the DB25 telemetry connector that is on the
machine’s back panel. The connector is fitted with 7 analog outputs, 8 open-
collector digital outputs and 4 digital inputs. It also manages the DB9 signals
associated with the RS232 connector, for interfacing with other equipment and for
the default programming functions, and the DB9 connector for communications
in I
2
C standard.
