©
National Instruments Corp.
9
FP-TB-1/2/3 Operating Instructions
Figure 10.
Connecting Power for Current Draws Below and Above 3 A
•
You need to wire power to the terminal bases only if you want
to use the terminal bases to route power to field devices or if
the I/O module requires it. FieldPoint I/O modules get their
power from the network module through the backplane and,
in most cases, require no external power for proper operation.
Refer to your I/O module operating instructions for details. In
Figure 11, shades of gray indicate differing voltage potentials.
Figure 11.
Different Voltage Potentials
Caution
Cascading power from neighboring bases or
network modules defeats isolation between cascaded
modules.
•
You may want to use separate power supplies for I/O modules
both to prevent power dips caused by field devices from
disrupting the operation of the network module and to maintain
1
When total current draw is
less than 3 A
2
When total current draw is
greater than 3 A
1
2
FP-TC-120
FP-AO-200
FP-AI-110
Live (V)
Ground
Neutral (C)
FP-RLY-420
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com