Emerson Process Management CSI 9420 Home Security System User Manual


 
Figure 6-2 shows how to run the accelerometer through a conduit that is grounded on both
ends. As a general rule, the transmitter housing itself is grounded through the base where
it is mounted. Since the conduit is electrically connected to the transmitter housing, this
effectively grounds the conduit at the transmitter end.
Grounding the conduit at the accelerometer end as well significantly reduces the
possibility that energy due to EMI/RFI can be coupled into the accelerometer cable. When
employing this method, minimize the length of cable that is outside of the conduit by
running the conduit as close as reasonably possible to the point where the accelerometer
is mounted to the equipment being monitored.
Grounded conduitFigure 6-2:
Accelerometer EMI and RFI considerations
104 MHM-97408, Rev 15