2 - Fagor Automation

Terminal strip to connect the Ballast resistor
Regenerative power supplies also have a small Ballast Circuit for dissipating
energy in case of an emergency. This emergency is issued when
there is no connection to mains and the Ballast circuit activating voltage is
exceeded. See table T. H2/14 in this chapter. Here are the two possible
configurations:
F. H2/20
Ballast resistor connection configurations.
Removing this jumper between Ri and L+ (factory setting) and not connecting
an external resistor between Re and L+ generates error code E215 or
E304 on the display.
The following table shows the values for gap, tightening torque, sections
and other interesting data of the feed-through terminals blocks for connecting
the ballast resistor:
T. H2/17 Technical data of the feed-through terminal blocks for connecting
the ballast resistor.
Connector data XPS-25 XPS-65
Min/max tightening torque (N·m) 0.6/0.8 0.6/0.8
Screw thread M3 M3
Min./max. section (mm²) 0.2/4 0.2/4
Rated current In (A) 32 32
These power supplies carry a protection against over-temperature which
triggers error E301 on the display when reaching 105 °C (221 °F).
Derating curves
The power that may be dissipated through the internal ballast resistor located
inside the power supply XPS-25 depends on the ambient temperature
as determined by the derating curve.
600
520
Configuration of the
internal resistor
XPS-25
XPS-65
R.int
L-
CONTROL
INTERNAL BALLAST
POWER (W)
L+
F. H2/21
Derating curve of regenerative power supplies XPS-25.
Configuration of the
external resistor
Ri Re L+ Ri Re L+
XPS-25
°C/°F
35/95 45/113
R.ext
ER+TH-X/X
ER+TH-18/X+FAN
XPS-25
XPS-65
R.int
The performance of the internal Ballast resistor of the regenerative power
supply XPS-65 does not suffer at high temperatures.
L-
CONTROL
Power supplies
L+
POWER SUPPLIES
Regenerative power supplies 2.
DDS
HARDWARE
Ref.1307
59