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E-AC Drive Hardware Installation Guide Appendix B – Regulatory Compliance: UL and CE

Cable Shielding

All cables must maintain high integrity 360 degree shielding, and be constructed
with at least 85% braid coverage. When you install inputs and outputs, you must
observe proper noise immunity standards. See the EMC Installation drawing at the
end of this appendix.

Ferrite Absorbers

To meet the requirements of the EMC directive, you must add clip-on ferrite
absorbers to all cables. Compumotor recommends a ferrite with at least 200ohm
impedance at 100MHz, such as:
Steward Ferrite part number 28A2024
Fair-Rite part number 0443164151
(These ferrites are available from Compumotor, part number 47-015956-01)
Enclosure Mounting the E-AC Drive
The enclosure must be properly earthed and paint must be removed from drive
mounting and RF earth bonding locations. Proper shield termination of all cables
entering and exiting the enclosure is required. The motor shield (braid) must be
fastened close to the drive’s heatsink. The shield must not make contact with other
conductors, as this will cause common mode drive generated PWM current to flow
where not expected. The shields of all other cables that enter or exit the enclosure
must be RF bonded to the enclosure entrance point via R-Clamp, bulkhead
clamshell clamp, or other 360° bonding technique. This ensures that no stray
noise will enter or exit the enclosure. The next drawing illustrates 360° bonding
techniques.
Remove outer jacket only.
Do not cut braid.
R-Clamp
C
abl
e
En
c
l
osu
r
e
P
a
n
el
B
u
lkh
eak
Clamshell Clam
p
B
u
lkh
eak
Clamshell Clam
p
C
abl
e
En
c
lo
su
r
e
P
a
n
el
360
°
Bonding Techniques
The following clamps and clamp kits are available from Compumotor.
Clamp Type: Compumotor Part Number:
R-Clamp 58-016050-01
R-Clamp Kit (10 per) R CLAMP KIT
Bulkhead Clamshell Clamp 53-016131-01
Clamshell Clamp Kit (2 per) CLAMSHELL KIT