246
Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
Chapter 9
Use I/O Modules with CompactLogix 5370 L3 Controllers
Calculate Power Consumption in Single Bank
Use this table to calculate power consumption in one bank.
IMPORTANT
One bank requires the CompactLogix 5370 L3 controllers to reside in the
leftmost slot. At minimum, you must calculate the power consumption of the
controller on the left side of the power supply.
If more modules are installed on the left side of the power supply, you must
calculate the power consumption for those modules as well.
If more modules are installed to the right of the power supply, you must
calculate the power consumption for that side separately.
Table 29 - Module Power Consumption Calculation for a Local Bank
Side of Power
Supply
Device Cat. No.
Number of
Modules
(3)
Module Current Requirements
Calculated Current =
(Number of Modules) x (Module
Current Requirements)
at 5V DC (in mA)
at 24V DC (in mA)
at 5V DC (in mA)
at 24V DC (in mA)
Left - Required
1769-L30ER
1769-L30ERM
1769-L30ER-NSE
1769-L33ER
1769-L33ERM
1769-L36ERM
1
500
225
500
225
Left - Optional
I/O Module-specific
Up to 3
Module-specific
Module-specific
Total Current Required
(2)
:
Right
I/O Module-specific
IMPORTANT
: Insert a separate row in this
calculation for each I/O module.
Up to 8
Module-specific
Module-specific
Total Current Required
:
Total Current Required for Single Bank if Modules Are Installed on Both Sides of the Power Supply
(1)
:
(1) This number must not exceed the power supply current capacity for the bank.
(2) This number must not exceed the power supply current capacity for this side of the bank.
(3) In the local bank, you can only install up to three modules to the left of the power supply because the CompactLogix 5370 L3 controllers have a power supply distance rating of four and must be within
four slots of the Compact I/O power supply. On the right side of the power supply in the local bank and both sides of the power supply in more banks, you can install up to eight modules if power supply
distance ratings for the modules validate the system design.
