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11 Cable Shielding, Segregation &
Noise Immunity
Proper
SMC 3010
Connector Case
a)
Connector Case
b)
Wrong
Connector Case
a)
Connector Case
b)
PROPER
Shield tied back at
terminal block.
WRONG
Shield grounded at
more than one point.
Terminal Block
Shield connected across
terminal block.
Terminal Block
Terminal Block
Terminal Block
Shields tied
back at device
PROPER
Shields tied
back at device
PROPER
Shields of field
cables grounded at
one point
Shields tied
back at device
Shields tied
back at device
WRONG
Shields of field
cables ungrounded
35
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