National Instruments FP-PS-4 - Manual (Page 6)

FP-PS-4 Operating Instructions 6 ni.com
needs. Select one or a combination of the methods to power the
signals of each of your I/O modules:
• The signals of the I/O module are powered by an FP-PS-4 that
is connected to only that I/O module.
• The signals of the I/O module share an FP-PS-4 with a
neighboring I/O module or network module. This is called
cascading power.
Caution Cascading power from neighboring bases or
network modules defeats isolation between cascaded
modules.
Figure 6 shows a combination of the two ways to power the
FieldPoint bank.
Figure 6. Wiring Power to Your FieldPoint Bank
In Figure 6, the FP-PS-4 bank provides the power using both of the
methods mentioned previously. The FP-2000 and FP-AO-200 have
their own power supplies. Isolation is maintained because the
FP-AO-200 has its own power supply. The FP-RLY-420 and
FP-DO-400 share a power supply, which provides enough power,
but defeats isolation between the signals of those two modules.
15 16 V
31 32 C
V 1 3 2
C 17 18
CAUTION: Cascading
power defeats isolation.
FP-DO-400 FP-RLY-420 FP-AO-200 FP-2000
FP-PS-4 Bank