HAPTER
2 - I
NSTALLATION
BDS4
2-4
2.6.2 Mounting the External
Regeneration Resistor(s)
WARNING
External regenerative
resistors are a shock hazard!
Mount these resistors
properly! Enclose these
resistors to protect personnel
and equipment!
CAUTION
External regeneration
resistors can become
extremely hot!
Allow safe clearance around
the resistor(s) enclosures.
Proper ventilation must be
provided.
Some models of PSR4/5 use an externally mounted
regen (shunt regulator) resistor. The resistor kit
includes mounting hardware and, depending on the
model, a thermal overload relay to be wired in with
the resistors. A suitable enclosed location outside the
equipment cabinet needs to be set aside for mounting
these components while observing the heat and shock
requirements of these resistors.
2.7 ELECTRICAL CONNECTIONS
WARNING
Dangerous voltages,
currents, temperatures, and
energy levels exist in this
product and in the
associated servo motor(s).
Extreme caution should be
exercised in the application
of this equipment. Only
qualified individuals should
attempt to install, set-up,
and operate this equipment.
Ensure that he motor, drive,
and the end-user assembly
are properly grounded per
NEC requirements.
To facilitate wiring, the BDS4 amplifiers must be
mounted next to the PSR4/5 power supply module in
descending order according to their continuous
current ratings. Refer to Section 2.6.
NOTE
In order to adhere to suitable
engineering practice, the AC
control voltage (115 VAC for
the logic bus) must be
applied first to activate the
control and fault logic
circuits prior to applying the
main AC voltage.
Follow these precautions:
1. Observe all notes on the wiring diagram.
2. All motor stator leads, signal input leads,
resolver leads, encoder leads, and tachometer
leads must be shielded.
3. Twist all AC leads to minimize electromagnetic
emissions (noise).
4. Avoid running signal leads (must be shielded)
in close proximity to power leads, motor stator
leads, or other sources of electromagnetic
noise.
5. Minimize lead lengths as much as possible.
6. Connect the BDS4 system according to the
System Wiring Diagram; pay close attention to
the grounding scheme.
7. Provide adequate stress relief for cables.
NOTE
The notes on BDS4 Wiring
Diagram (A-93231) give
specific wiring details.
Thermal overload protection for the motor is not
provided within the PSR4/5 or the BDS4 and must be
provided externally. Refer to the National Electrical
Code for proper sizing of overload protection.
With the exception of the hook-up of the motor, the
main input voltage, and the main Bus+ and Bus- DC
voltage, all interface wiring between the BDS4,
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