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TQ10X User Guide
Protective Circuits
The TQ10X Drive has several protective circuits, some of which can indicate fault
conditions by illuminating one of the LEDs.
Drive Overtemperature Protection
To protect against damage from high temperatures, the TQ10X Drive has an
internal temperature sensor. If the output stage overheats, the red
DRIVE
OVERTEMP
LED will illuminate, and the drive will shut down. This is a latched
fault. To restart the drive, first allow it to cool, then cycle power. You can prevent
overtemperature faults by heatsinking the drive properly (or adding the -HS3
Heatsink/Fan Unit option), and maintaining ambient temperature at or below 50°C
(122°F).
Short Circuit Protection
The TQ10X Drive has short circuit protection. The drive monitors current in its
motor output terminals. When the drive detects a short circuit in the motor or
motor cabling, it illuminates the
MOTOR FAULT
LED, and stops producing motor
current. This is a latched condition. To restart the drive, first fix the short in the
motor or cable, then cycle power.
Regeneration
The TQ10X Drive has an internal regeneration resistor. If the motor regener-
ates—produces excess energy during deceleration—the drive will automatically
dissipate the excess energy in its regeneration resistor. The power capacity of the
resistor is 1KW for one second, or 10 watts on a continuous basis. If the motor
regenerates more energy than can be dissipated in the regeneration resistor, the
resulting voltage rise on the drive's motor output terminals can cause an overvolt-
age fault (see below).
If excessive regeneration repeatedly causes overvoltage faults, you may need to
alter your move profile, change application conditions, or install an external
regeneration resistor (see Chapter 2—Installation for instructions).
Vertical applications require careful sizing, and should use a mechanical brake to
aid in deceleration.
Overvoltage
The TQ10X Drive monitors the voltage on the motor output terminals. If the
voltage rises above a threshold level, the drive will shut down power output to the
motor, and will illuminate red the bicolor LED labeled
RED = OVERVOLTAGE
.
Excessive regeneration is the primary cause of an overvoltage fault.
This is a latched fault. Cycle power to resume operations.
Undervoltage
The TQ10X Drive monitors the voltage on its AC power input terminals. If the
voltage falls below 80VAC, the drive will shut down and activate its fault output.
When you apply power to the drive, the power-up event is indistinguishable from
an undervoltage; therefore, the undervoltage fault is not latched. Furthermore, an
undervoltage fault will unlatch any other faults that may be present at the time of
the undervoltage.
There is no LED indicator for an undervoltage fault.
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