Rockwell Automation 1766-Lxxxx MicroLogix 1400 Programmable Controllers User Manual - Manual (Page 383)

Rockwell Automation Publication 1766-UM001H-EN-P - May 2014 343
Appendix
H
System Loading and Heat Dissipation
System Loading
Calculations The MicroLogix 1400 controller is designed to support up to any seven 1762
expansion I/O modules.
When you connect MicroLogix accessories and expansion I/O, an electrical load
is placed on the controller power supply. This section shows how to calculate the
load of your control system.
The following example is provided to illustrate system loading calculation.
The system calculation procedure accounts for the amount of 5V DC and 24V
DC current consumed by controller, expansion I/O, and user-supplied
equipment. Use the System Loading Worksheet on page 345 to calculate your
controller configuration.
TIP
A maximum of seven 1762 I/O modules, in any combination, can be
connected to a MicroLogix 1400 controller. You can use this appendix
to determine the power supply load and heat dissipation for
your system.