Ametek AMEVision - EMC Grounding Method; EMC Grounding, Shielding, and Noise Protection

PN 9000-165-VE, Rev P
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 (sensor 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
control 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 (see Figure 1-2). 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.
• Ground Stud Method
Connect all cable shields for that conduit entry to the grounding stud
closest to that conduit entry hole.
Figure 1-2.
Direct shield grounding
methods.
SHIELD RING METHOD
GROUND STUD METHOD
Shield Terminal Ring
Conduit Housing
Cable Shield(s)
Max. Length 1 inch
Conduit Nut
Quick Disconnet (1/4”)
Capacitor
Conduit Nut
Cable Shield(s)
Max. Length 2 inches
Nut
Washer
Ring Terminal
Conduit Housing
Capacitor
1-4 | Thermox
®
AMEVision Display User Interface