Johnson Controls VFD67 Series, Getting Started Manual, Page: 16 / 52

16
VFD67 Size A to D Getting Started Guide
www.johnsoncontrols.com Issue Number: 1
W) need to be fed twice through a ferrite ring (provided with the drive), so that the drive
meets the requirements of operating in the second environment.
4.3.2 Removing the internal EMC filter
Figure 4-3 Removal and re-fitting of internal EMC filter
4.3.3 Further EMC precautions
Further EMC precautions are required if more stringent EMC emission requirements
apply:
•
Operation in the first environment of EN 61800-3
• Conformity to the generic emission standards
• Equipment which is sensitive to electrical interference operating nearby
In this case it is necessary to use:
•
The optional external EMC filter
• A shielded motor cable, with shield clamped to the grounded metal panel
• A shielded control cable, with shield clamped to the grounded metal panel
A full range of external EMC filters is also available for use with VFD67.
4.4 Control terminals I/O specification
Internal
EMC filter
Tab fully inserted:
EMC filter fitted
Internal
EMC filter
B
Tab fully extended:
EMC filter disconnected
A
The control circuits are isolated from the power circuits in the drive by basic insulation
(single insulation) only. The installer must ensure that the external control circuits are
insulated from human contact by at least one layer of insulation (supplementary
insulation) rated for use at the AC supply voltage.
WARNING
If the control circuits are to be connected to other circuits classified as Safety Extra Low
Voltage (SELV) (e.g. to personal computer), an additional isolating barrier must be
included in order to maintain the SELV classification.
WARNING
See Pr 05 on page 24 ( Drive configuration ) for terminal connection / set-up diagrams and
details.
NOTE
The digital inputs are positive logic only.
NOTE