
IF303 – Operation and Maintenance Instruction Manual
2.2
Figure 2.1 - LCD Indicator
MAIN CIRCUIT BOARD
INPUT CIRCUIT BOARD
SUPPLY
POWER
SUPPLY
SIGNAL
SHAPING
DISPLAY BOARD
FIRMWARE
DOWNLOAD
INTERFACE
LOCAL ADJUST
CPU
EEPROM
FLASH
RAM
MODEM
POWER
ISOLATION
DISPLAY
CONTROLLER
S
I
G
N
A
L
I
S
O
L
A
T
I
O
N
(*) Resistor Shunt
(3 x 100R)
Figure 2.2 - IF303 Block Diagram
* WARNING
Apply in the inputs of the conversor only current levels.
Don’t apply tension levels
, because the shunt
resistors are of 100R 1W and
tension higher than 10 Vdc can damage them
.