Curtiss-Wright | Tritex II DC Rev. J PN49220 2/8/2016
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30 volt limit. Notice there is no external diode, isolating the power supply
from the Bus voltage. For this example, set the User Overvoltage Fault
Limit to 33 V. The Tritex shunt regulator will attempt to limit the Bus
Voltage to 30 volts (90% of 33 V) to protect the power supply from
overvoltage faults & shutdowns and the I/O from overvoltage. If the
regen energy is too large, the shunt regulator will turn off to protect itself
and a high bus voltage fault will occur at 33 V, disabling the drive and
protecting the power supply and I/O circuits.
Unregulated supplies often have very large capacitors that can store
regen energy if allowed to be back driven. This characteristic can be
used in conjunction with the internal shunt resistor and regulator. The
shunt operating point is set to the working voltage of the capacitors.
Regen energy is stored in the capacitor until its voltage rises to the shunt
operating point. Then the internal shunt accepts up to 10 J of additional
energy.
Handling Regen Energy
– External Shunt Resistor and Regulator
For applications lowering vertical loads or decelerating a large inertia
or working to hold back some force, regen energy will exceed the ability
of the internal shunt resistor and power supply to dissipate or store it.
The TTSR1 Shunt Regulator can handle at least two hundred joules of
energy at up to 95 Watt average power. It has a fixed operating voltage
of 77V, so the power supply must be able to be back driven to more than
this voltage or a blocking diode is required. The TDCESF1Power
Distribution and Surge Filter accessory may be used to simplify
wiring when an external shunt regulator is used with single or multiple
Tritex II DC.
Logic Power Supply
A logic power supply can be used to maintain the control and position
information with bus power removed. This power supply is optional and
requires about 2 watts of power. It is wired to the Logic Power terminal
(+) and Power Common terminal (-). if it is not connected the logic power
will come the bus power. Note that the main power and logic power
Fuse
Fuse
AC Input
24V DC
Regulated
Power Supply
+
-
Bus Power
Power Common
GND
Field I/O Common
Fuse
Field I/O Power
Power
Connector
I/O
Connector
Summary of Contents for Tritex II DC Series
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Page 53: ...Curtiss Wright Tritex II DC Rev J PN49220 2 8 2016 53 Cable Shield Grounding Example...
Page 62: ...Curtiss Wright Tritex II DC Rev J PN49220 2 8 2016 62 ACCESSORIES Cables TTIOC xxx I O Cable...
Page 63: ...Curtiss Wright Tritex II DC Rev J PN49220 2 8 2016 63 TTIPC xxx Power Cable...
Page 64: ...Curtiss Wright Tritex II DC Rev J PN49220 2 8 2016 64 TTICO xxx Communications Cable...
