cFP-2120 Quick Start Guide
14
ni.com
Wire Power to the Compact FieldPoint System
Each cFP-2120 on your network requires an 11–30 VDC power supply.
A.
Connect the positive lead of the
primary power supply to one
of the V1 terminals and the
negative lead to one of the
C terminals.
B.
If you are using a backup power
supply, connect the positive lead
to V2 and the negative lead to
one of the C terminals. The
cFP-2120 uses the power supply
with the higher voltage level.
V2 is isolated from the other V terminals.
C.
Refer to the operating instructions for the power requirements of each I/O
module.
D.
Use a separate power supply for each module that needs external power.
Caution
Cascading power defeats isolation between the cascaded
modules.
6
C
V1
V2
+
–
+
–
11–30 VDC
Primary Power Supply
11–30 VDC Backup
Power Supply
(optional)
