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Mechanical Installation
NBRA-653/663
Installation Site
Mounting Instructions
for NBRA-653/663
Installation and Start-up Guide for NBRA-6xx
Chapter 3 – Voltage Selection and Mechanical Installation
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-653/663 is presented in
Appendix A.
The NBRA-653/663 is protected to IP54. This must be considered
when selecting the installation site.
The following restrictions should also be noted:
• Leave 150 mm free space below and above the braking chopper.
• To prevent the chopper overheating, do not mount the chopper
directly above the braking resistor.
• Leave 300 mm free space below and above the ACS 600 unit.
• 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. Make sure 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.
• Lift the chopper onto the screws on the wall.
• Tighten the screws.
3-3
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