Ametek WDG-V, User Manual

Page: 54 / 131

PN 9000-133-VE, Rev U
EMC Grounding, Shielding and Noise Protection
For EMC purposes, under no circumstances should you leave cable
shields disconnected at one end or both ends of the cable (analyzer or
control unit, or other device).
You must use twisted-pair cable in rigid metal conduit or use twisted pair cable
with an overall braided shield. All cable shields or conduits connecting to the
analyzer unit must be chassis grounded.
EMC Grounding Method
• Shield Ring Method
Connect all shields for that conduit entry (other than power) to a supplied
shield terminal ring (Figure 2-14.1). This shield ring is a stainless steel ring
with a metal tab. Place the shield ring under the conduit nut. Crimp the
shields from all cables for that conduit entry to a 1/4" female quick discon-
nect, then push it onto the tab that sticks out of the conduit shield ring.
Keep shields as short as possible.
SHIELD RING METHOD
GROUND STUD METHOD
Shield Terminal Ring
Conduit Housing
Cable Shield(s)
Max. Length 1 inch
Conduit Nut
Quick Disconnect (1/4”)
Capacitor
Conduit Nut
Cable Shield(s)
Max. Length 2 inches
Nut
Washer
Ring Terminal
Conduit Housing
Capacitor
Figure 2-14.1.
EMC Grounding, shield ring
method.
Figure 2-14.2.
EMC Grounding, ground stud
method.
SHIELD RING METHOD
GROUND STUD METHOD
Shield Terminal Ring
Conduit Housing
Cable Shield(s)
Max. Length 1 inch
Conduit Nut
Quick Disconnect (1/4”)
Capacitor
Conduit Nut
Cable Shield(s)
Max. Length 2 inches
Nut
Washer
Ring Terminal
Conduit Housing
Capacitor
•
Ground Stud Method
Connect all cable shields for that conduit entry to the grounding stud clos-
est to that conduit entry hole (Figure 2-14.2).
2-28 | Thermox
®
WDG-V / VC / VCM / VM