Chapter 1 Module
1
56
(4) Cable shield grounding
If the analog signal is unstable due to noise influences, change the grounding for the
shield in the following order for stable operation.
(a)
Internal circuit
External wire
nP
nN
nG
FG
(b)
Internal circuit
External wire
nP
nN
nG
FG
(c)
Internal circuit
External wire
nP
nN
nG
FG
(d)
Internal circuit
External wire
nP
nN
nG
FG
Twisted-pair wire
Cable shield
Twisted-pair wire
Cable shield
Twisted-pair wire
Cable shield
Twisted-pair wire
Cable shield
Load
FG
Load
FG
Load
FG
Load
FG
model 3000 Analog module User's Manual