Allen-Bradley Logix5000 User Manual

Rockwell Automation Publication ENET-UM004B-EN-P - November 2015 15
5000 Series EtherNet/IP Communication Module Overview Chapter 1
Track SA Power Bus Current Draw
We recommend that you track the SA power bus current draw, max, per module,
and collectively for the 5069 Compact I/O system.
Consider the following with this example:
• The values in this example represent a worst-case calculation. That is, all
modules that draw SA power bus current, draw the maximum available on
the module.
• Not all modules that are shown in
Figure 4 use SA power bus current. For
example, the 5069-ARM and 5069-OW4I modules only pass SA power
bus current to the next module. Other modules that do not use SA power
bus current, but are not shown in the graphic, include the 5069-OB16,
5069-OB16F, and 5069-OX4I modules.
• System SA power bus current, max, is calculated as each module draws SA
power bus current.
In the example in
Figure 4, after the 5069-IB16 module in slot 1 draws SA
power bus current, the system SA power bus current, max, is 138 mA.
After the 5069-IB16 module in slot 2 draws SA power bus current, the
system SA power bus current draw is 266 mA.
This process continues until the system SA power bus current, max,
is 1.222 A.
Figure 4 - 5069 Compact I/O System - Calculate SA Power Bus Current Draw
Continuous MOD Power Bus Limited to 10 A, max
Continuous SA Power Bus Limited to 10 A, max
SA Power Bus Current, max,
Per Module
10 mA
System SA Power Bus Current, max = 1.222 A
128 mA 128 mA 128 mA 128 mA 0 mA 0 mA 100 mA 100 mA 250 mA 250 mA

Allen-Bradley Logix5000 Specifications

General

Brand	Allen-Bradley
Model	Logix5000
Category	Controller
Language	English