Rockwell Automation Publication 1769-UM021I-EN-P - May 2018 159
Use I/O Modules with CompactLogix 5370 L1 Controllers Chapter 7
– 1734-FPD POINT I/O Field Power Distributor Module - A field
power distributor module can also be installed between embedded
I/O modules and local expansion modules or between local
expansion modules.
The field power distributor module breaks the available field power
current between the modules to its left and right. With the field
power distributor module installed, the modules to its left can draw
up to 3 A of field power current. The modules to the right of the field
power distributor module can draw as much field power current as
allowed by the field power distributor.
For more information on the 1734-FPD POINT I/O Field Power
Distributor module, see the POINT I/O Field Power Distributor
Module Installation Instructions, publication 1734-IN059
.
• You must connect an external 24V DC power source to the FP+ and FP-
terminals on the removable connector on the controller. This
connection provides power to input and output devices that are
connected to the local expansion modules.
– Series A controllers require an extra external 24V DC power source
for the FP+ and FP- terminal connections. For more information on
how to connect an extra external power source for series A L1
controller to the FP+ and FP- terminals, see Appendix C
.
– Series B controllers use the external 24V DC power source that is
connected to the VDC+ and VDC- terminals on the controller for
the FP+ and FP- terminal connections. Series B controllers can also
use an extra external 24V DC power source for the FP+ and FP-
terminal connections.
The field-side power requirement of the local expansion modules of the
controller is 24V DC nominally with an input range of 10…28.8V DC.
For more information on how to connect a power source to the FP+ and
FP- terminals, see page 144
.
IMPORTANT Remember, the field power distributor module changes only the
level of field power current available in the system. It does not affect
the level of POINTBus backplane current available.
IMPORTANT Install a user-replaceable fuse with overcurrent protection of
4…6 A in line between the incoming power and the FP+ terminal.
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