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Chapter 3 – Voltage Selection and Mechanical Installation
Mechanical Installation
NBRA-658/659/669
Installation Site
Mounting Instructions
for NBRA-658/659/669
3-10
WARNING! Before starting the installation work inside the ACS 600:
Switch off the ACS 600 power supply. Wait for five minutes to ensure
that the intermediate circuit is discharged. Switch off dangerous
voltages connected from external circuits to the digital inputs and to the
relay outputs of the ACS 600.
WARNING! Do not touch the printed circuit boards. The integrated
circuits are extremely sensitive to electrostatic discharge.
The dimensional drawing of the NBRA-658/659/669 is presented in
Appendix A.
The degree of protection of the NBRA-658/659/669 is IP00. This must
be taken into account when selecting the installation site. Installation in
a cabinet is highly recommended.
The following restrictions should also be observed:
• Leave 150 mm free space below and above the braking chopper.
• Leave 300 mm free space below and above the ACS 600 unit.
• Leave enough space for the fuses.
• To prevent the chopper from overheating, do not mount it directly
above the braking resistor(s).
• The maximum lengths of the chopper and resistor cables are 5 m
and 10 m respectively.
• Ensure that the chopper voltage level is set correctly (see page 3-1).
• Check the intended installation site for sufficient room. Mark the
locations for the four holes.
• Make holes in the four positions. Ensure that the dust from drilling
does not enter the unit you are installing or other equipment at the
installation site.
• Insert screws in the holes. Use plugs if necessary. Tighten the
screws far enough to be able to carry the weight of the chopper.
• Lift the chopper onto the mounting screws.
• Tighten the screws.
Installation and Start-up Guide for NBRA-6xx
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