CI867AK01 3BSE092689R1 ABB New imported warehouse spot module

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CI867AK01 3BSE092689R1 ABB New imported warehouse spot module
CI867AK01 3BSE092689R1 ABB New imported warehouse spot module
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The NGC8206 must be properly grounded. The NGC has a grounding lug on the
mounting neck of the enclosure. This lug should be tied to a good earth ground
with no smaller than #12AWG wire. The NGC8206 cannot be connected to any
pipeline where cathodic protection exists. If the system uses cathodic protection,
the NGC must be mounted on a section of pipe that has been electrically isolated
from the cathodic currents (see Figure 1—16).
1.4.1 Power Supply
The power supply for the NGC should have an isolated output (i.e., the negative
side of the 12VDC output should not be electrically connected to chassis or earth
ground). In many instances, the power supply is collocated with a radio. If the
radio is connected to the NGC8206 via RS232/485/422, the communications
should share the power ground. The communication shield should only be
connected at the NGC end. The other end should be left to float (left
unconnected).
1.4.2 Sample Probe
If the sample probe is mounted to a section of pipe where cathodic currents may
exist, the user needs to put isolators in the sample tubing between the sample
probe and the NGC. Any time that the sample probe is on a section of pipe other
than the one where the NGC is directly mounted, tubing isolators should be
employed. It is very important that probe ground and the NGC ground be at the
same potential. If this cannot be insured, tubing isolators must be used.