Calculate System Power Consumption; Validate Placement Of I/O Modules - Allen-Bradley 1769 User Manual

Table 19 - I/O Module Power Consumption Calculation Table
Catalog Number Number of
Modules
1769-L31
1769-L32C
1769-L32E
1769-L35CR
1769-L35E
(1) This number must not exceed the power supply current capacity.
Table 20 - Power Supply Current Capacity
Specification
Output Bus Current Capacity 0...55 °C (32...131 °F)
24V DC User Power Capacity 0...55 °C (32...131 °F)

Calculate System Power Consumption

To validate your proposed system, calculate the total 5V DC current and 24V
DC to be consumed.
Module Current Requirements
at 5V DC (in mA) at 24V DC (in mA)
330 40
650 40
660 90
680 40
660 90
Total Current Required
Power Supply and Capacity
1769-PA2
2 A at 5V DC and 0.8 A at 24V DC
250 mA (maximum)

Validate Placement of I/O Modules

The controller you use determines how many local I/O modules you
can configure.
Table 21 - Controller I/O Support
Controller
1769-L35CR
1769-L35E
1769-L32C, 1769-L32E and
1769-L31
To validate the proposed placement of I/O modules in your CompactLogix
system, perform this procedure.
Rockwell Automation Publication 1769-UM011H-EN-P - April 2012
Calculated Current =
(Number of Modules) x (Module Current Requirements)
at 5V DC (in mA)
(1)
:
1769-PB2
NA
Supported Local I/O Modules
30
30
16
Place, Configure, and Monitor I/O Chapter 6
at 24V DC (in mA)
1769-PA4 1769-PB4
4 A at 5V DC and 2 A at 24V DC
I/O Banks
3
3
3
83