Fagor CNC 8070, Hardware Configuration, Page: 63 / 276

Hardware configuration.
CNC 8070
CENTRAL
UNIT + MONITO
R (ETX PLATFORM).
5.
Powe
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ply fo
r the modu
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·63·
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: 1911)
5.7.3 Battery-powered RAM memory (non-volatile RAM).
The CNC has battery-powered RAM memory that keeps the information saved in it even
when a power failure occurs. The RAM memory is powered by a battery that may be
accessed from the outside. See
"5.10 housing for the compact flash and battery-powered
RAM memory." on page 78.
The RAM memory with battery always saves the position of the axes, the rest of the data
that it saves is determined by machine parameters, like for example, PLC registers
(parameter BKUPREG), common arithmetic parameters (parameter BKUPCUP), etc.
5.7.4 Central unit protections.
Protection against over-voltage and reverse voltage.
The central unit has a fuse that may be accessed from the outside to protect against over-
voltage (greater than 36 V DC or 25 V AC). The central unit is also protected against reverse
connection of the power supply, preventing it from starting up.
Protection against over-current.
An over-current activates the safety device inside the power supply turns on the external red
LED. The power supply will not be operative while the LED is on. There are two ways to
reactivate the power supply after an over-current.
• Unplug the power supply from mains and wait for about 30 seconds until the red light
turns off.
• Unplug the power supply and press the ·LATCH· button. The red LED will turn off
indicating that the power supply is ready.
If after reactivating the power supply, the LED turns back on, call the Technical Service
Department.
Power outages.
Meets EN 61000-4-11 standard. The central unit is capable of withstanding micro-outages
of up to 10 milliseconds.
Saving data in the battery-powered RAM required version V3.14 or higher.
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