92 Rockwell Automation Publication 1769-UM022C-EN-P - June 2018
Chapter 6 Add and Configure Standard I/O Modules
Local Bank
To validate the local bank design, confirm that the design meets these
requirements:
• The controller is the left-most device in the local bank.
• No more than three modules are installed between the controller and
the left side of the power supply.
• No more than eight modules are installed to the right of the power
supply.
• The power consumption of the modules on each side of the power
supply does not exceed the capacity of the power supply for that side.
• The total power consumption by all modules in the bank does not
exceed the capacity of the power supply for the entire bank.
• Modules are installed such that all power supply distance rating and
system power consumption requirements are met.
For example, the 1769-SDN scanner has a power supply distance rating
of four. If the design includes the installation of a 1769-SDN scanner
with greater than three modules between it and the power supply, the
design is invalid.
The following example graphic shows a local bank.
IMPORTANT Regarding power supply distance ratings, if you install a module
that violates its power supply distance rating specification, the
system can appear to operate normally for a time, but could
experience operational issues over time, such as I/O faults.
1769-L36ERMS
Controller
1769 Compact I/O
Power Supply
End Cap
Compact I/O Modules
Compact I/O Modules
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