14 Rockwell Automation Publication ENET-UM004B-EN-P - November 2015
Chapter 1 5000 Series EtherNet/IP Communication Module Overview
SA Power
SA power is field-side power that some 5069 Compact I/O module use to power
field-side devices that are connected to them.
5069 Compact I/O System SA Power Bus
When the SA power source is turned on, that is, a 5069 Compact I/O system
receives field-side power, the following occurs.
1. The 5069-AEN2TR EtherNet/IP adapter draws current from the SA
power bus current and passes the remaining current through to the next
module.
2. The next module completes one of the following tasks.
– If the module uses SA power to power a field-side device, the module
draws current from the SA power bus and passes the remaining current
through to the next module.
– If the module does not use SA power bus current, the module passes the
remaining current through to the next module.
3. The process continues until all SA power bus current needs are met for the
modules on the SA power bus.
For more information on the current that the 5069 Compact I/O modules draw
from the SA power bus, see the 5069 Compact I/O Modules Specifications
Technical Data, publication
5069-TD001.
IMPORTANT
Remember the following:
• A 5069 Compact I/O system can use multiple SA power buses. You can use a
5069-FPD field potential distributor to establish additional SA power buses
in a 5069 Compact I/O system, as described on
page 16.
• You must limit SA power sources to the following:
- Up 10 A, max, at 18…32V DC
- Up to 10 A, max, at 0…240V AC
We recommend that you use an external SA power source that is
adequately sized for the total SA power bus current draw. For example, if
the total current draw from an SA power bus is 5 A, you can use an SA
power supply that is limited to 5 A at 18…32V DC or 0…240V AC.
• Connections to the SA power bus use a shared common. All inputs that
draw SA power bus current to power field-side devices have a return
through circuitry to the SA - terminal on the SA power connector.
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