Power supplies
2.
94
Ref.1912
DDS
HARDWARE
· 46 ·
Derating curves
The power these resistors can dissipate depends on the ambient
temperature according to the following derating curves.
Connection terminals for the power DC BUS
At the bottom of the module, covered by a screwed on lid, the power supply
offers the terminal for the power DC BUS. This BUS provides a DC voltage
output of 565 V DC (when the line voltage is 400 V AC) that feeds all the
modular drives that are part of the DDS system.
Two plates are supplied with each module to join them with the adjacent
drives.
FAGOR power supplies have a Soft Start for charging the power DC BUS.
The soft start begins when two necessary and sufficient conditions are
verified:
No errors on any of the modules connected through the internal bus
(connector X1)
Presence of the three mains phases at the input of the module.
This startup process begins when the FAULT indicator stops blinking and
ends when the status indicator DC BUS ON turns on.
F. H2/10
Derating curves of the Ballast dissipation power on non-regenerative power
supplies.
INTERNAL BALLAST
POWER (W)
PS-25B4
400
280
35/95 45/113
°C/°F
INTERNAL BALLAST
POWER (W)
PS-65A
900
600
15/59 45/113
°C/°F
MANDATORY. All the modules powered by the same power supply must be
joined by the same power DC BUS. This condition is a must for the system
to work.
WARNING. Never connect the power DC BUS while the system is running.
There are voltages of about 600 V DC!
WARNING. Please note that the STO (Safe Torque Off) safety function
does not imply an electrical power off. There is still voltage at the DC BUS.
Ignoring this warning may cause electric shock.
MANDATORY. The tightening torque of these terminals must be between
2.3 and 2.8 N·m. This point is very important to ensure good electrical
contact between modules.
INFORMATION. For PS-25B4 power supplies, it is enough to have two
mains phases.
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